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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Museum Map — The Cipher Museum</title>
<link rel="icon" href="favicon.svg" type="image/svg+xml">
<link rel="manifest" href="manifest.webmanifest">
<meta name="description" content="Navigate all 13 exhibit halls, the Hall of Foundations mathematics annex, and 160 exhibits in The Cipher Museum. Find your next cryptographic adventure.">
<meta property="og:title" content="Museum Map — The Cipher Museum">
<meta property="og:description" content="Navigate all 13 exhibit halls, the Hall of Foundations mathematics annex, and 160 exhibits in The Cipher Museum. Find your next cryptographic adventure.">
<meta property="og:type" content="website">
<meta property="og:url" content="https://ciphermuseum.com/museum-map.html">
<meta property="og:image" content="https://ciphermuseum.com/images/og/og-default.png">
<meta property="og:image:width" content="1200">
<meta property="og:image:height" content="630">
<meta property="og:image:alt" content="The Cipher Museum — an interactive history of encryption">
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<meta name="twitter:title" content="Museum Map — The Cipher Museum">
<meta name="twitter:description" content="Navigate all 13 exhibit halls, the Hall of Foundations mathematics annex, and 160 exhibits in The Cipher Museum. Find your next cryptographic adventure.">
<meta name="twitter:image" content="https://ciphermuseum.com/images/og/og-default.png">
<meta name="theme-color" content="#0a0a0f">
<link rel="canonical" href="https://ciphermuseum.com/museum-map.html">
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</head>
<body>
<a class="skip-link" href="#main-content">Skip to main content</a>
<nav class="museum-nav" aria-label="Primary"><div class="nav-inner">
<a href="index.html" class="nav-logo"><svg class="nav-logo-icon" viewBox="0 0 32 32" fill="none"><circle cx="16" cy="16" r="14" stroke="currentColor" stroke-width="1.5"/><circle cx="16" cy="16" r="8" stroke="currentColor" stroke-width="1"/><circle cx="16" cy="16" r="2" fill="currentColor"/><line x1="16" y1="2" x2="16" y2="6" stroke="currentColor" stroke-width="1.5"/><line x1="16" y1="26" x2="16" y2="30" stroke="currentColor" stroke-width="1.5"/><line x1="2" y1="16" x2="6" y2="16" stroke="currentColor" stroke-width="1.5"/><line x1="26" y1="16" x2="30" y2="16" stroke="currentColor" stroke-width="1.5"/></svg><span class="nav-logo-text">The Cipher Museum</span></a>
<ul class="nav-links"><li><a href="index.html">Entrance</a></li><li><a href="museum-map.html" class="active">Museum Map</a></li><li><a href="timeline.html">Timeline</a></li>
<li><a href="challenges.html">Challenges</a></li>
<li><a href="glossary.html">Glossary</a></li>
<li><a href="cryptanalysis.html">Cryptanalysis Techniques</a></li>
<li><a href="further-reading.html">Further Reading</a></li><li><a href="modern.html">Modern Crypto</a></li></ul>
</div></nav>
<main id="main-content" tabindex="-1">
<div class="page-hero">
<div class="breadcrumb"><a href="index.html">Entrance</a><span>›</span>Museum Map</div>
<span class="page-eyebrow">Your Guide to the Collection</span>
<h1 class="page-title">Museum Map</h1>
<p class="page-tagline">13 halls, the Foundations Annex, 160 exhibits — one continuous story: how humanity learned to keep secrets</p>
</div>
<!-- ───────── SUGGESTED ROUTE ───────── -->
<div class="section" style="padding-bottom:0;">
<div class="callout" style="border-color:var(--gold-b);background:var(--gold-glow);max-width:720px;margin:0 auto;">
<span class="callout-icon">🧭</span>
<div class="callout-body">
<p><strong>Suggested route:</strong> Start in <a href="halls/ancient.html">Hall I (Ancient)</a> and walk forward through time. Each hall builds on what came before — substitution leads to polyalphabetic, which leads to machines, which leads to the one cipher that can never be broken. End at <a href="modern.html">Modern Cryptography</a> to see where every classical failure led.</p>
</div>
</div>
</div>
<!-- ───────── TRUST LABEL LEGEND ───────── -->
<div class="section" id="trust-labels" style="padding-top:1rem;">
<div class="section-head">
<span class="section-eyebrow">Reading the Exhibits</span>
<h2 class="section-title">Trust Labels</h2>
<p class="section-sub">Every cipher exhibit carries one of four labels indicating its modern security status. Click a label on any exhibit to return here.</p>
</div>
<div class="trust-legend" role="list" aria-label="Trust label categories">
<div class="trust-legend__item" role="listitem">
<span class="trust-label trust-label--broken" aria-label="Broken">
<svg class="trust-label__icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><rect x="4" y="11" width="16" height="10" rx="2"/><path d="M8 11V7a4 4 0 0 1 7.5-2"/></svg>
<span class="trust-label__text">Broken</span>
</span>
<p class="trust-legend__desc">Historically important and well-studied, but cryptographically broken. Use only for learning — never for real secrets.</p>
</div>
<div class="trust-legend__item" role="listitem">
<span class="trust-label trust-label--historical" aria-label="Historical Only">
<svg class="trust-label__icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M3 7a2 2 0 0 1 2-2h11v12a2 2 0 0 0 2 2H6a3 3 0 0 1-3-3V7z"/><path d="M16 5a2 2 0 0 1 2 2v8h3a0 0 0 0 1 0 0v2a2 2 0 0 1-2 2"/></svg>
<span class="trust-label__text">Historical Only</span>
</span>
<p class="trust-legend__desc">Curiosities, primitive shifts, undeciphered manuscripts, and steganographic devices. Important to the story of cryptography; never serious modern security.</p>
</div>
<div class="trust-legend__item" role="listitem">
<span class="trust-label trust-label--educational" aria-label="Educational">
<svg class="trust-label__icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M4 4.5A2.5 2.5 0 0 1 6.5 2H20v17H6.5A2.5 2.5 0 0 0 4 21.5z"/><path d="M4 19.5A2.5 2.5 0 0 1 6.5 17H20"/></svg>
<span class="trust-label__text">Educational</span>
</span>
<p class="trust-legend__desc">Useful for teaching a specific cryptographic concept (substitution, fractionation, key reuse) but not intended for security. Reserved for explicitly didactic constructions.</p>
</div>
<div class="trust-legend__item" role="listitem">
<span class="trust-label trust-label--secure" aria-label="Secure (Modern)">
<svg class="trust-label__icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M12 2 4 5v6c0 5 3.5 9 8 11 4.5-2 8-6 8-11V5z"/><path d="m9 12 2 2 4-4"/></svg>
<span class="trust-label__text">Secure (Modern)</span>
</span>
<p class="trust-legend__desc">Still considered secure when used correctly with modern key handling — AES, RSA, SHA-256, Diffie–Hellman, and the one classical cipher that survives: the one-time pad.</p>
</div>
</div>
</div>
<!-- ───────── VISUAL FLOOR PLAN ───────── -->
<div class="section">
<div class="section-head">
<span class="section-eyebrow">Architectural Floor Plan</span>
<h2 class="section-title">The Building</h2>
<p class="section-sub">Click any hall or exhibit to enter. Your last-visited hall is highlighted.</p>
</div>
<div class="bldg" role="region" aria-label="Interactive museum floor plan showing 13 halls, special exhibitions, the modern cryptography wing, and the Hall of Foundations mathematics annex">
<!-- ── Entrance Portico ── -->
<a href="index.html" class="bldg-entrance" data-hall-id="entrance">
<svg class="bldg-columns" viewBox="0 0 200 32" aria-hidden="true"><rect x="10" y="0" width="6" height="32" rx="2" fill="var(--gold-dim)" opacity=".5"/><rect x="42" y="0" width="6" height="32" rx="2" fill="var(--gold-dim)" opacity=".5"/><rect x="152" y="0" width="6" height="32" rx="2" fill="var(--gold-dim)" opacity=".5"/><rect x="184" y="0" width="6" height="32" rx="2" fill="var(--gold-dim)" opacity=".5"/><rect x="0" y="0" width="200" height="5" rx="2" fill="var(--gold-dim)" opacity=".35"/></svg>
<div class="bldg-entrance-title">The Cipher Museum</div>
<div class="bldg-entrance-sub">ENTRANCE · EST. c. 1900 BC</div>
</a>
<!-- ── Wing A: Ancient & Classical (Halls I–III) ── -->
<div class="bldg-wing">
<div class="bldg-wing-label">ANCIENT & CLASSICAL WING</div>
<div class="bldg-wing-rooms">
<a href="halls/ancient.html" class="bldg-room" data-hall-id="ancient" data-color="#C8845A" style="border-top:2px solid #C8845A">
<div class="bldg-room-num">I</div>
<div class="bldg-room-name">World Origins of Cryptography</div>
<div class="bldg-room-era">c. 1900 BC – 1400 AD</div>
<div class="bldg-room-exhibits">
<span><span class="fp-marker-dot">●</span> <a href="ciphers/atbash.html">Atbash</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/scytale.html">Scytale</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/caesar.html">Caesar</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/rot13.html">ROT13</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/polybius.html">Polybius</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/kama-sutra.html">Kama Sutra</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/egyptian-substitution.html">Egyptian Substitution</a></span>
<span>+ Arabic Nomenclators · Aeneas Tacticus · Histiaeus · Joseon · Ge’ez</span>
</div>
</a>
<div class="bldg-door" aria-hidden="true"><span></span></div>
<a href="halls/substitution.html" class="bldg-room" data-hall-id="substitution" data-color="#C8A85A" style="border-top:2px solid #C8A85A">
<div class="bldg-room-num">II</div>
<div class="bldg-room-name">Classical Substitution</div>
<div class="bldg-room-era">800 – 1929</div>
<div class="bldg-room-exhibits">
<span><span class="fp-marker-dot">●</span> <a href="ciphers/monoalphabetic.html">Monoalphabetic</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/homophonic.html">Homophonic</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/playfair.html">Playfair</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/four-square.html">Four-Square</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/two-square.html">Two-Square</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/hill.html">Hill</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/great-cipher.html">Great Cipher</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/babington.html">Babington Plot</a></span>
</div>
</a>
<div class="bldg-door" aria-hidden="true"><span></span></div>
<a href="halls/polyalphabetic.html" class="bldg-room" data-hall-id="polyalphabetic" data-color="#9FC87A" style="border-top:2px solid #9FC87A">
<div class="bldg-room-num">III</div>
<div class="bldg-room-name">Polyalphabetic Revolution</div>
<div class="bldg-room-era">1553 – 1880</div>
<div class="bldg-room-exhibits">
<span><span class="fp-marker-dot">●</span> <a href="ciphers/vigenere.html">Vigenère</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/beaufort.html">Beaufort</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/porta.html">Porta</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/gronsfeld.html">Gronsfeld</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/running-key.html">Running Key</a></span>
</div>
</a>
</div>
</div>
<!-- Corridor -->
<div class="bldg-corridor" aria-hidden="true">
<svg width="100%" height="16" viewBox="0 0 400 16" preserveAspectRatio="none"><line x1="0" y1="8" x2="400" y2="8" stroke="var(--gold-dim)" stroke-width=".5" stroke-dasharray="6 4" opacity=".4"/><polygon points="200,2 196,8 200,14 204,8" fill="var(--gold-dim)" opacity=".3"/></svg>
</div>
<!-- ── Wing B: Transposition & Military (Halls IV–V + Civil War) ── -->
<div class="bldg-wing">
<div class="bldg-wing-label">MILITARY & TRANSPOSITION WING</div>
<div class="bldg-wing-rooms">
<a href="halls/transposition.html" class="bldg-room" data-hall-id="transposition" data-color="#5A90C8" style="border-top:2px solid #5A90C8">
<div class="bldg-room-num">IV</div>
<div class="bldg-room-name">Transposition & Fractionation</div>
<div class="bldg-room-era">19th – 20th Century</div>
<div class="bldg-room-exhibits">
<span><span class="fp-marker-dot">●</span> <a href="ciphers/rail-fence.html">Rail Fence</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/columnar.html">Columnar</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/double-transposition.html">Double Transposition</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/bifid.html">Bifid</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/trifid.html">Trifid</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/fractionated-morse.html">Fractionated Morse</a></span>
</div>
</a>
<div class="bldg-door" aria-hidden="true"><span></span></div>
<a href="halls/military.html" class="bldg-room" data-hall-id="military" data-color="#C85A5A" style="border-top:2px solid #C85A5A">
<div class="bldg-room-num">V</div>
<div class="bldg-room-name">Military & Spy Ciphers</div>
<div class="bldg-room-era">WWI – Cold War</div>
<div class="bldg-room-exhibits">
<span><span class="fp-marker-dot">●</span> <a href="ciphers/nihilist.html">Nihilist</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/adfgx.html">ADFGX</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/adfgvx.html">ADFGVX</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/bazeries.html">Bazeries</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/straddling-checkerboard.html">Straddling Checkerboard</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/vic.html">VIC</a></span>
<span>+ Argenti · Culper Ring · Arnold-André · Diana · IRA Book · Null Cipher</span>
</div>
</a>
<div class="bldg-door" aria-hidden="true"><span></span></div>
<a href="halls/civil-war.html" class="bldg-room bldg-room--special" data-hall-id="civil-war" data-color="#A07FCC" style="border-top:2px solid #A07FCC">
<div class="bldg-room-num">VI</div>
<div class="bldg-room-name">Civil War Gallery</div>
<div class="bldg-room-era">1861 – 1865</div>
<div class="bldg-room-exhibits">
<span><span class="fp-marker-dot">●</span> <a href="ciphers/stager.html">Stager</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/confederate-vigenere.html">Confederate Vigenère</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/dictionary-code.html">Dictionary Code</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/chinese-telegraph.html">Chinese Telegraph</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/zimmermann.html">Zimmermann</a></span>
<span>+ Morse · Slidex · Commercial Codebooks · Latin American Codebooks</span>
</div>
</a>
</div>
</div>
<!-- Corridor -->
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<svg width="100%" height="16" viewBox="0 0 400 16" preserveAspectRatio="none"><line x1="0" y1="8" x2="400" y2="8" stroke="var(--gold-dim)" stroke-width=".5" stroke-dasharray="6 4" opacity=".4"/><polygon points="200,2 196,8 200,14 204,8" fill="var(--gold-dim)" opacity=".3"/></svg>
</div>
<!-- ── Wing C: Machines & Puzzle (Halls VI–VII) ── -->
<div class="bldg-wing">
<div class="bldg-wing-label">MACHINES & CURIOSITIES WING</div>
<div class="bldg-wing-rooms bldg-wing-rooms--duo">
<a href="halls/machines.html" class="bldg-room" data-hall-id="machines" data-color="#C8905A" style="border-top:2px solid #C8905A">
<div class="bldg-room-num">VII</div>
<div class="bldg-room-name">Mechanical Cipher Machines</div>
<div class="bldg-room-era">1467 – 1945</div>
<div class="bldg-room-exhibits">
<span><span class="fp-marker-dot">●</span> <a href="ciphers/alberti-disk.html">Alberti Disk</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/enigma.html">Enigma</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/lorenz.html">Lorenz</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/sigaba.html">SIGABA</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/typex.html">Typex</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/fialka.html">Fialka</a></span>
<span>+ KL-7 · Geheimschreiber · Kryha · M-94 · Red · JN-25 · Purple · Navajo</span>
</div>
</a>
<div class="bldg-door" aria-hidden="true"><span></span></div>
<a href="halls/puzzle.html" class="bldg-room" data-hall-id="puzzle" data-color="#5AC8A0" style="border-top:2px solid #5AC8A0">
<div class="bldg-room-num">VIII</div>
<div class="bldg-room-name">Puzzle & Novelty</div>
<div class="bldg-room-era">1605 – Present</div>
<div class="bldg-room-exhibits">
<span><span class="fp-marker-dot">●</span> <a href="ciphers/pigpen.html">Pigpen</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/bacon.html">Bacon's Cipher</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/tap-code.html">Tap Code</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/zodiac.html">Zodiac Cipher</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/copiale.html">Copiale</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/beale.html">Beale Ciphers</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/kryptos.html">Kryptos</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/voynich.html">Voynich Manuscript</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/bible-code.html">Bible Code (ELS)</a></span>
</div>
</a>
</div>
</div>
<!-- Corridor -->
<div class="bldg-corridor" aria-hidden="true">
<svg width="100%" height="16" viewBox="0 0 400 16" preserveAspectRatio="none"><line x1="0" y1="8" x2="400" y2="8" stroke="var(--gold-dim)" stroke-width=".5" stroke-dasharray="6 4" opacity=".4"/><polygon points="200,2 196,8 200,14 204,8" fill="var(--gold-dim)" opacity=".3"/></svg>
</div>
<!-- ── Wing D: Hall IX Unbreakable + Lab ── -->
<div class="bldg-wing">
<div class="bldg-wing-label">UNBREAKABLE WING & LABORATORY</div>
<div class="bldg-wing-rooms bldg-wing-rooms--duo">
<a href="halls/unbreakable.html" class="bldg-room bldg-room--final" data-hall-id="unbreakable" data-color="#C9A84C" style="border-top:2px solid #C9A84C">
<div class="bldg-room-num">IX</div>
<div class="bldg-room-name">The Unbreakable</div>
<div class="bldg-room-era">1882 – 1949</div>
<div class="bldg-room-exhibits">
<span><span class="fp-marker-dot">●</span> <a href="ciphers/one-time-pad.html">One-Time Pad</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/vernam.html">Vernam</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/solitaire.html">Solitaire / Pontifex</a></span>
</div>
</a>
<div class="bldg-door" aria-hidden="true"><span></span></div>
<a href="cryptanalysis.html" class="bldg-room bldg-room--lab" data-hall-id="lab" data-color="#5AC8A0" style="border-top:2px solid #5AC8A0">
<div class="bldg-room-num">⚗</div>
<div class="bldg-room-name">Cryptanalysis Techniques</div>
<div class="bldg-room-era">Interactive Research</div>
<div class="bldg-room-exhibits">
<span>10 techniques · 12 famous codebreaks</span>
<span><a href="lab/workbench.html" style="color:var(--gold)">→ Workbench</a></span>
</div>
</a>
</div>
</div>
<!-- Corridor -->
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<svg width="100%" height="16" viewBox="0 0 400 16" preserveAspectRatio="none"><line x1="0" y1="8" x2="400" y2="8" stroke="var(--gold-dim)" stroke-width=".5" stroke-dasharray="6 4" opacity=".4"/><polygon points="200,2 196,8 200,14 204,8" fill="var(--gold-dim)" opacity=".3"/></svg>
</div>
<!-- ── Wing E: Special Exhibitions ── -->
<div class="bldg-wing">
<div class="bldg-wing-label">SPECIAL EXHIBITIONS</div>
<div class="bldg-wing-rooms bldg-wing-rooms--duo">
<a href="halls/codebreakers.html" class="bldg-room bldg-room--special" data-hall-id="codebreakers" data-color="#A07FCC" style="border-top:2px solid #A07FCC">
<div class="bldg-room-num">X</div>
<div class="bldg-room-name">Hall of Codebreakers</div>
<div class="bldg-room-era">850 AD – 2020</div>
<div class="bldg-room-exhibits">
<span>21 stories of codebreaking brilliance</span>
<span>Al-Kindi · Turing · Friedman · Rejewski · Tutte · Clarke</span>
</div>
</a>
<div class="bldg-door" aria-hidden="true"><span></span></div>
<a href="halls/modern-crypto.html" class="bldg-room bldg-room--final" data-hall-id="modern-crypto" data-color="#5A90C8" style="border-top:2px solid #5A90C8">
<div class="bldg-room-num">XI</div>
<div class="bldg-room-name">Modern Cryptography</div>
<div class="bldg-room-era">1976 – Present</div>
<div class="bldg-room-exhibits">
<span><span class="fp-marker-dot">●</span> <a href="ciphers/des.html">DES</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/diffie-hellman.html">Diffie-Hellman</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/rsa.html">RSA</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/aes.html">AES</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/sha256.html">SHA-256</a></span> <span><span class="fp-marker-dot">●</span> <a href="ciphers/ecdsa.html">ECDSA</a></span> <span><span class="fp-marker-dot">●</span> <a href="ciphers/zero-knowledge-proofs.html">Zero-Knowledge</a></span> <span>+ SIGSALY · Bletchley Park · Cabinet Noir · Microdot</span> <span><a href="modern.html" style="color:var(--gold)">→ Wider landscape</a></span>
</div>
</a>
</div>
<div class="bldg-wing-rooms bldg-wing-rooms--duo" style="margin-top:1rem;">
<a href="halls/unsolved.html" class="bldg-room bldg-room--special" data-hall-id="unsolved" data-color="#C8945A" style="border-top:2px solid #C8945A">
<div class="bldg-room-num">XII</div>
<div class="bldg-room-name">Unsolved Ciphers</div>
<div class="bldg-room-era">~1700 BCE – Present</div>
<div class="bldg-room-exhibits">
<span><span class="fp-marker-dot">●</span> <a href="ciphers/voynich.html">Voynich</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/kryptos.html">Kryptos K4</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/beale.html">Beale</a></span>
<span><span class="fp-marker-dot">●</span> <a href="ciphers/dorabella.html">Dorabella</a></span>
<span>+ Phaistos · Shugborough · D'Agapeyeff · Somerton · McCormick · Z-13/Z-32</span>
</div>
</a>
<div class="bldg-door" aria-hidden="true"><span></span></div>
<a href="halls/culture.html" class="bldg-room bldg-room--special" data-hall-id="culture" data-color="#7FA8C8" style="border-top:2px solid #7FA8C8">
<div class="bldg-room-num">XIII</div>
<div class="bldg-room-name">Cipher Culture</div>
<div class="bldg-room-era">pre-79 CE – Present</div>
<div class="bldg-room-exhibits">
<span><span class="fp-marker-dot">●</span> Bach motif · Dancing Men · Gold-Bug</span>
<span><span class="fp-marker-dot">●</span> Cicada 3301 · ARG ciphers · MIT Mystery Hunt</span>
<span><span class="fp-marker-dot">●</span> Sator Square · Freemason pigpen tradition</span>
</div>
</a>
</div>
</div>
<!-- ── Annex: Hall of Foundations ── -->
<div class="bldg-wing">
<div class="bldg-wing-label">FOUNDATIONS ANNEX — THE MATHEMATICS UNDER THE CRYPTOGRAPHY</div>
<div class="bldg-wing-rooms bldg-wing-rooms--solo">
<div class="bldg-room bldg-room--special bldg-room--annex" data-hall-id="foundations" data-color="#2A6F6B" style="border-top:2px solid #2A6F6B">
<a href="hall-of-foundations/index.html" class="bldg-annex-head">
<div class="bldg-room-num">ANNEX</div>
<div class="bldg-room-name">Hall of Foundations</div>
<div class="bldg-room-era">Exhibits 141–156 · Number Theory · Hardness · Structures</div>
</a>
<div class="bldg-room-exhibits">
<span><span class="fp-marker-dot">●</span> <a href="hall-of-foundations/finite-fields.html">Finite Fields</a></span>
<span><span class="fp-marker-dot">●</span> <a href="hall-of-foundations/one-way-function.html">One-Way Functions</a></span>
<span><span class="fp-marker-dot">●</span> <a href="hall-of-foundations/lattices-svp.html">Lattices & SVP</a></span>
<span><span class="fp-marker-dot">●</span> <a href="hall-of-foundations/elliptic-curves-real.html">Elliptic Curves</a></span>
<span><span class="fp-marker-dot">●</span> <a href="hall-of-foundations/entropy.html">Entropy</a></span>
<span><span class="fp-marker-dot">●</span> <a href="hall-of-foundations/pairings.html">Pairings</a></span>
<span>+ 16 interactive exhibits on the mathematics your keys stand on</span>
</div>
</div>
</div>
</div>
<!-- Compass + Legend -->
<div class="bldg-footer">
<div class="bldg-legend">
<span><span class="fp-marker-dot">●</span> Exhibit</span>
<span><span class="bldg-legend-door"></span> Doorway</span>
<span class="bldg-legend-here" id="youAreHere" style="display:none">📍 <span id="youAreHereLabel">You were last in…</span></span>
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</div>
</div>
<!-- ───────── COMPLETE CIPHER INDEX ───────── -->
<div class="section">
<div class="section-head">
<span class="section-eyebrow">Reference</span>
<h2 class="section-title">Complete Cipher Index</h2>
<p class="section-sub">The 140 cipher exhibits, organized by hall — the annex continues at §141–156.</p>
</div>
<div style="max-width:700px;margin:0 auto;">
<div class="panel">
<div class="panel-head"><span class="panel-icon">📋</span><span class="panel-title">140 Cipher Exhibits</span></div>
<div class="panel-body" style="padding:0;">
<table class="cipher-table" style="font-size:.75rem;">
<thead><tr><th>#</th><th>Cipher</th><th>Hall</th></tr></thead>
<tbody>
<tr><td>01</td><td><a href="ciphers/scytale.html">Scytale</a><span class="trust-label trust-label--historical trust-label--sm" title="Historical Only">Historical Only</span></td><td>I</td></tr>
<tr><td>02</td><td><a href="ciphers/caesar.html">Caesar Cipher</a><span class="trust-label trust-label--historical trust-label--sm" title="Historical Only">Historical Only</span></td><td>I</td></tr>
<tr><td>03</td><td><a href="ciphers/polybius.html">Polybius Square</a><span class="trust-label trust-label--historical trust-label--sm" title="Historical Only">Historical Only</span></td><td>I</td></tr>
<tr><td>04</td><td><a href="ciphers/monoalphabetic.html">Monoalphabetic</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>II</td></tr>
<tr><td>05</td><td><a href="ciphers/homophonic.html">Homophonic</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>II</td></tr>
<tr><td>06</td><td><a href="ciphers/playfair.html">Playfair</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>II</td></tr>
<tr><td>07</td><td><a href="ciphers/hill.html">Hill Cipher</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>II</td></tr>
<tr><td>08</td><td><a href="ciphers/vigenere.html">Vigenère</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>III</td></tr>
<tr><td>09</td><td><a href="ciphers/beaufort.html">Beaufort</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>III</td></tr>
<tr><td>10</td><td><a href="ciphers/porta.html">Porta</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>III</td></tr>
<tr><td>11</td><td><a href="ciphers/gronsfeld.html">Gronsfeld</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>III</td></tr>
<tr><td>12</td><td><a href="ciphers/running-key.html">Running Key</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>III</td></tr>
<tr><td>13</td><td><a href="ciphers/rail-fence.html">Rail Fence</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>IV</td></tr>
<tr><td>14</td><td><a href="ciphers/columnar.html">Columnar Transposition</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>IV</td></tr>
<tr><td>15</td><td><a href="ciphers/double-transposition.html">Double Transposition</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>IV</td></tr>
<tr><td>16</td><td><a href="ciphers/bifid.html">Bifid Cipher</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>IV</td></tr>
<tr><td>17</td><td><a href="ciphers/trifid.html">Trifid Cipher</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>IV</td></tr>
<tr><td>18</td><td><a href="ciphers/fractionated-morse.html">Fractionated Morse</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>IV</td></tr>
<tr><td>19</td><td><a href="ciphers/nihilist.html">Nihilist Cipher</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>V</td></tr>
<tr><td>20</td><td><a href="ciphers/adfgx.html">ADFGX Cipher</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>V</td></tr>
<tr><td>21</td><td><a href="ciphers/adfgvx.html">ADFGVX Cipher</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>V</td></tr>
<tr><td>22</td><td><a href="ciphers/bazeries.html">Bazeries Cipher</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>V</td></tr>
<tr><td>23</td><td><a href="ciphers/vic.html">VIC Cipher</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>V</td></tr>
<tr><td>24</td><td><a href="ciphers/stager.html">Stager Cipher</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>VI</td></tr>
<tr><td>25</td><td><a href="ciphers/confederate-vigenere.html">Confederate Vigenère</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>VI</td></tr>
<tr><td>26</td><td><a href="ciphers/dictionary-code.html">Dictionary Code</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>VI</td></tr>
<tr><td>27</td><td><a href="ciphers/alberti-disk.html">Alberti Cipher Disk</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>VII</td></tr>
<tr><td>28</td><td><a href="ciphers/jefferson-disk.html">Jefferson Disk</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>VII</td></tr>
<tr><td>29</td><td><a href="ciphers/enigma.html">Enigma Machine</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>VII</td></tr>
<tr><td>30</td><td><a href="ciphers/lorenz.html">Lorenz Cipher</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>VII</td></tr>
<tr><td>31</td><td><a href="ciphers/navajo-code-talkers.html">Navajo Code Talkers</a><span class="trust-label trust-label--secure trust-label--sm" title="Secure (Modern)">Secure (Modern)</span></td><td>VII</td></tr>
<tr><td>32</td><td><a href="ciphers/pigpen.html">Pigpen Cipher</a><span class="trust-label trust-label--historical trust-label--sm" title="Historical Only">Historical Only</span></td><td>VIII</td></tr>
<tr><td>33</td><td><a href="ciphers/bacon.html">Bacon's Cipher</a><span class="trust-label trust-label--historical trust-label--sm" title="Historical Only">Historical Only</span></td><td>VIII</td></tr>
<tr><td>34</td><td><a href="ciphers/tap-code.html">Tap Code</a><span class="trust-label trust-label--historical trust-label--sm" title="Historical Only">Historical Only</span></td><td>VIII</td></tr>
<tr><td>35</td><td><a href="ciphers/zodiac.html">Zodiac Cipher</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>VIII</td></tr>
<tr><td>36</td><td><a href="ciphers/one-time-pad.html">One-Time Pad</a><span class="trust-label trust-label--secure trust-label--sm" title="Secure (Modern)">Secure (Modern)</span></td><td>IX</td></tr>
<tr><td>37</td><td><a href="ciphers/vernam.html">Vernam Cipher</a><span class="trust-label trust-label--secure trust-label--sm" title="Secure (Modern)">Secure (Modern)</span></td><td>IX</td></tr>
<tr><td>38</td><td><a href="ciphers/great-cipher.html">The Great Cipher (Rossignols)</a><span class="trust-label trust-label--historical trust-label--sm" title="Historical Only">Historical Only</span></td><td>II</td></tr>
<tr><td>39</td><td><a href="ciphers/babington.html">Babington Plot Cipher</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>II</td></tr>
<tr><td>40</td><td><a href="ciphers/voynich.html">Voynich Manuscript</a><span class="trust-label trust-label--historical trust-label--sm" title="Historical Only">Historical Only</span></td><td>VIII</td></tr>
<tr><td>41</td><td><a href="ciphers/atbash.html">Atbash</a><span class="trust-label trust-label--historical trust-label--sm" title="Historical Only">Historical Only</span></td><td>I</td></tr>
<tr><td>42</td><td><a href="ciphers/rot13.html">ROT13</a><span class="trust-label trust-label--historical trust-label--sm" title="Historical Only">Historical Only</span></td><td>I</td></tr>
<tr><td>43</td><td><a href="ciphers/four-square.html">Four-Square Cipher</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>II</td></tr>
<tr><td>44</td><td><a href="ciphers/two-square.html">Two-Square Cipher</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>II</td></tr>
<tr><td>45</td><td><a href="ciphers/straddling-checkerboard.html">Straddling Checkerboard</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>V</td></tr>
<tr><td>46</td><td><a href="ciphers/chaocipher.html">Chaocipher</a><span class="trust-label trust-label--historical trust-label--sm" title="Historical Only">Historical Only</span></td><td>VII</td></tr>
<tr><td>47</td><td><a href="ciphers/m209.html">M-209 (Hagelin C-38)</a><span class="trust-label trust-label--historical trust-label--sm" title="Historical Only">Historical Only</span></td><td>VII</td></tr>
<tr><td>48</td><td><a href="ciphers/copiale.html">Copiale Cipher</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>VIII</td></tr>
<tr><td>49</td><td><a href="ciphers/beale.html">Beale Ciphers</a><span class="trust-label trust-label--historical trust-label--sm" title="Historical Only">Historical Only</span></td><td>VIII</td></tr>
<tr><td>50</td><td><a href="ciphers/kryptos.html">Kryptos</a><span class="trust-label trust-label--historical trust-label--sm" title="Historical Only">Historical Only</span></td><td>VIII</td></tr>
<tr><td>51</td><td><a href="ciphers/solitaire.html">Solitaire / Pontifex</a><span class="trust-label trust-label--historical trust-label--sm" title="Historical Only">Historical Only</span></td><td>IX</td></tr>
<tr><td>52</td><td><a href="ciphers/purple.html">Purple (Type 97)</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>VII</td></tr>
<tr><td>53</td><td><a href="ciphers/autokey.html">Autokey</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>III</td></tr>
<tr><td>54</td><td><a href="ciphers/nomenclator.html">Nomenclator</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>II</td></tr>
<tr><td>55</td><td><a href="ciphers/book-cipher.html">Book Cipher</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>V</td></tr>
<tr><td>56</td><td><a href="ciphers/dorabella.html">Dorabella Cipher</a><span class="trust-label trust-label--secure trust-label--sm" title="Secure (Modern)">Secure (Modern)</span></td><td>VIII</td></tr>
<tr><td>57</td><td><a href="ciphers/sigaba.html">SIGABA (ECM Mark II)</a><span class="trust-label trust-label--secure trust-label--sm" title="Secure (Modern)">Secure (Modern)</span></td><td>VII</td></tr>
<tr><td>58</td><td><a href="ciphers/typex.html">Typex</a><span class="trust-label trust-label--secure trust-label--sm" title="Secure (Modern)">Secure (Modern)</span></td><td>VII</td></tr>
<tr><td>59</td><td><a href="ciphers/des.html">DES (Data Encryption Standard)</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>XI</td></tr>
<tr><td>60</td><td><a href="ciphers/diffie-hellman.html">Diffie-Hellman Key Exchange</a><span class="trust-label trust-label--secure trust-label--sm" title="Secure (Modern)">Secure (Modern)</span></td><td>XI</td></tr>
<tr><td>61</td><td><a href="ciphers/rsa.html">RSA</a><span class="trust-label trust-label--secure trust-label--sm" title="Secure (Modern)">Secure (Modern)</span></td><td>XI</td></tr>
<tr><td>62</td><td><a href="ciphers/aes.html">AES (Advanced Encryption Standard)</a><span class="trust-label trust-label--secure trust-label--sm" title="Secure (Modern)">Secure (Modern)</span></td><td>XI</td></tr>
<tr><td>63</td><td><a href="ciphers/sha256.html">SHA-256</a><span class="trust-label trust-label--secure trust-label--sm" title="Secure (Modern)">Secure (Modern)</span></td><td>XI</td></tr>
<tr><td>64</td><td><a href="ciphers/egyptian-substitution.html">Egyptian Substitution</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>I</td></tr>
<tr><td>65</td><td><a href="ciphers/histiaeus-tattoo.html">Histiaeus Tattoo</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>I</td></tr>
<tr><td>66</td><td><a href="ciphers/aeneas-tacticus.html">Aeneas Tacticus</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>I</td></tr>
<tr><td>67</td><td><a href="ciphers/kama-sutra.html">Kama Sutra Cipher</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>I</td></tr>
<tr><td>68</td><td><a href="ciphers/arabic-nomenclators.html">Arabic Nomenclators</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>I</td></tr>
<tr><td>69</td><td><a href="ciphers/joseon-yeokhak.html">Joseon Yeokhak</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>I</td></tr>
<tr><td>70</td><td><a href="ciphers/amharic-ge-ez-ciphers.html">Amharic Ge'ez Ciphers</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>I</td></tr>
<tr><td>71</td><td><a href="ciphers/rosetta-stone.html">Rosetta Stone</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>I</td></tr>
<tr><td>72</td><td><a href="ciphers/trithemius.html">Trithemius</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>III</td></tr>
<tr><td>73</td><td><a href="ciphers/affine.html">Affine Cipher</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>III</td></tr>
<tr><td>74</td><td><a href="ciphers/wheatstone.html">Wheatstone Cryptograph</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>III</td></tr>
<tr><td>75</td><td><a href="ciphers/wallis-ciphers.html">Wallis Ciphers</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>III</td></tr>
<tr><td>76</td><td><a href="ciphers/cardano-autokey.html">Cardano Autokey</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>V</td></tr>
<tr><td>77</td><td><a href="ciphers/argenti.html">Argenti Family</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>V</td></tr>
<tr><td>78</td><td><a href="ciphers/cardano-grille.html">Cardano Grille</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>V</td></tr>
<tr><td>79</td><td><a href="ciphers/culper-ring.html">Culper Ring Code</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>V</td></tr>
<tr><td>80</td><td><a href="ciphers/arnold-andre.html">Arnold-André Cipher</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>V</td></tr>
<tr><td>81</td><td><a href="ciphers/ira-book-cipher.html">IRA Book Cipher</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>V</td></tr>
<tr><td>82</td><td><a href="ciphers/che-guevara.html">Che Guevara VIC Variant</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>V</td></tr>
<tr><td>83</td><td><a href="ciphers/diana-cryptosystem.html">Diana Cryptosystem</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>V</td></tr>
<tr><td>84</td><td><a href="ciphers/vietnamese-underground.html">Vietnamese Underground Codes</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>V</td></tr>
<tr><td>85</td><td><a href="ciphers/red-army-faction.html">Red Army Faction OTP</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>V</td></tr>
<tr><td>86</td><td><a href="ciphers/null-cipher.html">Null Cipher</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>V</td></tr>
<tr><td>87</td><td><a href="ciphers/chinese-telegraph.html">Chinese Telegraph Code</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>VI</td></tr>
<tr><td>88</td><td><a href="ciphers/morse.html">Morse Code</a><span class="trust-label trust-label--historical trust-label--sm" title="Historical Only">Historical Only</span></td><td>VI</td></tr>
<tr><td>89</td><td><a href="ciphers/zimmermann.html">Zimmermann Telegram</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>VI</td></tr>
<tr><td>90</td><td><a href="ciphers/commercial-codebooks.html">Commercial Codebooks</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>VI</td></tr>
<tr><td>91</td><td><a href="ciphers/latin-american-codebooks.html">Latin American Codebooks</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>VI</td></tr>
<tr><td>92</td><td><a href="ciphers/slidex.html">Slidex</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>VI</td></tr>
<tr><td>93</td><td><a href="ciphers/fialka.html">Fialka M-125</a><span class="trust-label trust-label--secure trust-label--sm" title="Secure (Modern)">Secure (Modern)</span></td><td>VII</td></tr>
<tr><td>94</td><td><a href="ciphers/kl-7.html">KL-7</a><span class="trust-label trust-label--secure trust-label--sm" title="Secure (Modern)">Secure (Modern)</span></td><td>VII</td></tr>
<tr><td>95</td><td><a href="ciphers/geheimschreiber.html">Geheimschreiber T52</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>VII</td></tr>
<tr><td>96</td><td><a href="ciphers/kryha.html">Kryha</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>VII</td></tr>
<tr><td>97</td><td><a href="ciphers/m-94.html">M-94 / M-138-A</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>VII</td></tr>
<tr><td>98</td><td><a href="ciphers/red-type-a.html">Red (Type A)</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>VII</td></tr>
<tr><td>99</td><td><a href="ciphers/jn-25.html">JN-25</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>VII</td></tr>
<tr><td>100</td><td><a href="ciphers/freemason-pigpen.html">Freemason Pigpen</a><span class="trust-label trust-label--historical trust-label--sm" title="Historical Only">Historical Only</span></td><td>VIII</td></tr>
<tr><td>101</td><td><a href="ciphers/bach-motif.html">Bach BACH Motif</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>VIII</td></tr>
<tr><td>102</td><td><a href="ciphers/sator-square.html">Sator Word Square</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>VIII</td></tr>
<tr><td>103</td><td><a href="ciphers/shugborough.html">Shugborough Inscription</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>XII</td></tr>
<tr><td>104</td><td><a href="ciphers/dagapeyeff.html">D'Agapeyeff Cipher</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>XII</td></tr>
<tr><td>105</td><td><a href="ciphers/somerton-man.html">Somerton Man</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>XII</td></tr>
<tr><td>106</td><td><a href="ciphers/mccormick.html">McCormick Cipher</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>XII</td></tr>
<tr><td>107</td><td><a href="ciphers/phaistos-disc.html">Phaistos Disc</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>XII</td></tr>
<tr><td>108</td><td><a href="ciphers/venona.html">VENONA</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>IX</td></tr>
<tr><td>109</td><td><a href="ciphers/sigsaly.html">SIGSALY</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>XI</td></tr>
<tr><td>110</td><td><a href="ciphers/microdot.html">Microdot Steganography</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>XI</td></tr>
<tr><td>111</td><td><a href="ciphers/bletchley-park.html">Bletchley Park</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>XI</td></tr>
<tr><td>112</td><td><a href="ciphers/cabinet-noir.html">Cabinet Noir</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>XI</td></tr>
<tr><td>113</td><td><a href="ciphers/kerckhoffs.html">Kerckhoffs's Principle</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>XI</td></tr>
<tr><td>114</td><td><a href="ciphers/station-hypo.html">Station HYPO</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>XI</td></tr>
<tr><td>115</td><td><a href="ciphers/rochefort.html">Joseph Rochefort</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>X</td></tr>
<tr><td>116</td><td><a href="ciphers/beurling.html">Arne Beurling</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>X</td></tr>
<tr><td>117</td><td><a href="ciphers/dilly-knox.html">Dilly Knox</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>X</td></tr>
<tr><td>118</td><td><a href="ciphers/yardley.html">Herbert Yardley</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>X</td></tr>
<tr><td>119</td><td><a href="ciphers/mavis-batey.html">Mavis Batey</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>X</td></tr>
<tr><td>120</td><td><a href="ciphers/gchq-trio.html">GCHQ Trio</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>X</td></tr>
<tr><td>121</td><td><a href="ciphers/kahn.html">David Kahn</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>X</td></tr>
<tr><td>122</td><td><a href="ciphers/dunin.html">Elonka Dunin</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>X</td></tr>
<tr><td>123</td><td><a href="ciphers/lasry.html">George Lasry</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>X</td></tr>
<tr><td>124</td><td><a href="ciphers/field-hollers.html">Field Hollers</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>XIII</td></tr>
<tr><td>125</td><td><a href="ciphers/gold-bug.html">Gold-Bug (Poe)</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>XIII</td></tr>
<tr><td>126</td><td><a href="ciphers/dancing-men.html">Dancing Men (Conan Doyle)</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>XIII</td></tr>
<tr><td>127</td><td><a href="ciphers/da-vinci-code.html">Da Vinci Code</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>XIII</td></tr>
<tr><td>128</td><td><a href="ciphers/national-treasure.html">National Treasure</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>XIII</td></tr>
<tr><td>129</td><td><a href="ciphers/gravity-falls.html">Gravity Falls Ciphers</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>XIII</td></tr>
<tr><td>130</td><td><a href="ciphers/cicada-3301.html">Cicada 3301</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>XIII</td></tr>
<tr><td>131</td><td><a href="ciphers/mit-mystery-hunt.html">MIT Mystery Hunt</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>XIII</td></tr>
<tr><td>132</td><td><a href="ciphers/krypto-arg.html">Krypto ARG</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>XIII</td></tr>
<tr><td>133</td><td><a href="ciphers/agnes-driscoll.html">Agnes Meyer Driscoll</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>X</td></tr>
<tr><td>134</td><td><a href="ciphers/bill-tutte.html">Bill Tutte</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>X</td></tr>
<tr><td>135</td><td><a href="ciphers/elizebeth-friedman.html">Elizebeth Smith Friedman</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>X</td></tr>
<tr><td>136</td><td><a href="ciphers/joan-clarke.html">Joan Clarke</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>X</td></tr>
<tr><td>137</td><td><a href="ciphers/leo-marks.html">Leo Marks</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>X</td></tr>
<tr><td>138</td><td><a href="ciphers/mary-stuart-castelnau-letters.html">Mary Stuart Castelnau Letters</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>X</td></tr>
<tr><td>139</td><td><a href="ciphers/patterson-jefferson-cipher.html">Patterson Cipher for Jefferson</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>II</td></tr>
<tr><td>140</td><td><a href="ciphers/bible-code.html">Bible Code (ELS)</a><span class="trust-label trust-label--broken trust-label--sm" title="Broken">Broken</span></td><td>VIII</td></tr>
<tr><td>158</td><td><a href="ciphers/ecdsa.html">ECDSA</a><span class="trust-label trust-label--secure trust-label--sm" title="Secure (Modern)">Secure (Modern)</span></td><td>XI</td></tr>
<tr><td>159</td><td><a href="ciphers/shamir-secret-sharing.html">Shamir's Secret Sharing</a><span class="trust-label trust-label--secure trust-label--sm" title="Secure (Modern)">Secure (Modern)</span></td><td>XI</td></tr>
<tr><td>160</td><td><a href="ciphers/zero-knowledge-proofs.html">Zero-Knowledge Proofs</a><span class="trust-label trust-label--secure trust-label--sm" title="Secure (Modern)">Secure (Modern)</span></td><td>XI</td></tr>
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<p style="text-align:center;font-size:.82rem;margin-top:.9rem;"><a href="hall-of-foundations/index.html">Continue to §141–156 · Hall of Foundations — the mathematics under the cryptography →</a></p>
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