Museum Map
13 halls, the Foundations Annex, 169 exhibits — one continuous story: how humanity learned to keep secrets
Suggested route: Start in Hall I (Ancient) 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 Modern Cryptography to see where every classical failure led.
Trust Labels
Cipher and protocol exhibits carry one of four labels indicating their modern security status. People, places, institutions, principles, fiction, cultural exhibits, and mathematical foundations carry no cipher trust label. Click a label on any exhibit to return here.
Cryptographically broken — historically important but unsafe to use today.
Obsolete or historical system; notes distinguish cryptanalysis from capture or other operational compromise.
A didactic construction for learning cryptographic concepts, not for security.
Still considered secure when used correctly with modern key handling.
The Building
Click any hall or exhibit to enter. Your last-visited hall is highlighted.
Complete Cipher Index
The 149 cipher and history exhibits, organized by hall — the annex remains at §141–157.
Continue to §141–157 · Hall of Foundations — the mathematics under the cryptography →