Modern Cryptography for the Absolute Beginner
summary
Begins with a vanilla Rails app and runnable Ruby examples that implement bcrypt for passwords, show UPC check digit style hashes, and demonstrate hybrid encryption: RSA 4096‑bit for key exchange plus symmetric AES for bulk data. Explains why passwords use one‑way hashes, why RSA only encrypts short blobs, how TLS sends a random session key via public key crypto, and briefly flags quantum computing as a looming threat.
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chapters (24)
- 0:00Introduction
- 3:54Enigma Machine
- 4:25Credit Cards
- 4:59History
- 5:49Cryptography vs Security
- 6:12Verification
- 7:20Parity Bits
- 7:39Even Parity
- 11:12Hashes
- 11:38Bcrypt
- 12:31symmetric encryption
- 13:03advanced by one
- 13:23symmetric
- 15:01public key cryptography
- 16:03encrypt something
- 17:08send encrypted messages
- 19:21authenticity
- 21:56digest
- 22:47act
- 26:59bit length
- 29:03key length
- 30:51modern cryptography
- 32:25Quantum cryptography
- 35:43Contact Jeffrey
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