Cryptography Pop Sci

A bilingual story of Alice & Bob walking the history of secrets — from ancient roads to getPassKeyS.org.

1. Ch. 1. Alice, Bob, and the Day the Locks Vanished
   Freshmen hurled into a pre-crypto world learn that seals, gossip, and bribes are poor substitutes for confidentiality and authenticity.
2. Ch. 2. Caesar’s Shift and the Stick of Sparta
   Substitution and transposition: clever for a season, fragile against patience and frequency.
3. Ch. 3. The Symmetric Mirror
   Shared secrets scale like shared Rings—fast encryption, impossible key distribution.
4. Ch. 4. Rotors over Europe
   Enigma, operating mistakes, and Turing’s war of probabilities.
5. Ch. 5. Machines that Think in State
   von Neumann’s stored-program world and why algorithms become infrastructure.
6. Ch. 6. A Handshake with No Shared Password
   Diffie–Hellman and the shock of public parameters.
7. Ch. 7. Primes, Envelopes, and RSA
   Trapdoor functions for strangers who must still trust a signature.
8. Ch. 8. Fingerprints of Data
   Hashing, integrity, and why changing one bit should shatter the seal.
9. Ch. 9. The Ledger that Outlived Kings
   Bitcoin’s peer incentives, Merkle commitments, and keys as custody.
10. Ch. 10. Two-Hundred-Fifty-Six Doors
    Adapted cosmos metaphor: planets of coins, private keys as the order of opening doors—retold in our words.
11. Ch. 11. Grandparents and the Inheritance Problem
    Wallets, hardware devices, steel seed plates, and social recovery without fairy tales.
12. Ch. 12. The Forge Named getPassKeyS
    Why the site exists: education, regeneration tools, VIP custody, and keys ordinary people can survive.

Start Chapter 1