# Cryptography

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Category: Mathematics
Slides: 32
Updated: 2026-05-15T22:18:38.651Z
Tags: mathematics, cryptography

## Summary

Three thousand years of attempts to make a message readable to its intended recipient and unreadable to anyone else. Until 1976, all of it ran on the same fundamental architecture. Then everything changed. Key sections include: Crypt ography.; // Opening $ what is cryptography; Chapter I $ the shift cipher.; Chapter II $ frequency analysis.; Chapter III $ the polyalphabetic ciphers.; Chapter IV $ the one-time pad.; Chapter V $ the enigma machine.; Chapter VI $ bletchley park.; Chapter VII $ the shannon paper.; Chapter VIII $ the symmetric standards..

## Slide Outline

1. Crypt ography.
2. // Opening $ what is cryptography
3. Chapter I $ the shift cipher.
4. Chapter II $ frequency analysis.
5. Chapter III $ the polyalphabetic ciphers.
6. Chapter IV $ the one-time pad.
7. Chapter V $ the enigma machine.
8. Chapter VI $ bletchley park.
9. Chapter VII $ the shannon paper.
10. Chapter VIII $ the symmetric standards.
11. Chapter IX $ public-key cryptography arrives.
12. Chapter X $ rsa.
13. Chapter XI $ hash functions and digital signatures.
14. Chapter XII $ elliptic-curve cryptography.
15. Chapter XIII $ tls — the internet's plumbing.
16. Chapter XIV $ attacks the algorithm doesn't see.
17. Chapter XV $ what "secure" means.
18. Chapter XVI $ zero-knowledge proofs.
19. Chapter XVII $ compute without revealing.
20. Chapter XVIII $ randomness and the entropy problem.
21. Chapter XIX $ the politics of strong cryptography.
22. Chapter XX $ the quantum threat.
23. Chapter XXI $ post-quantum standardisation.
24. Chapter XXII $ the lattice that is everywhere.
25. Chapter XXIII $ end-to-end messaging.
26. Chapter XXIV $ cryptography in cryptocurrency.
27. Chapter XXV $ twenty-five works.
28. Chapter XXVI $ watch & read.
29. Chapter XXVII $ never roll your own.
30. Chapter XXVIII $ what is not yet known.
31. Chapter XXIX $ the field at present.
32. End of stream.

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