Applied Information Security : 07 Cryptography Confidentiality

Preparation

History (before XOR):

History of Cryptography, by Thawte Consulting (archived), sections 2-4 (6 pages)

Perfect Secrecy (one-time pad):

Crypto101, by van Houtven, Chapter 5 (11 ½pages, ~5 pages)

Key generation:

Crypto101, by van Houtven, Chapter 14 sections 14.1-14.3 but skip Nyquist (4 ½pages, ~2 pages)

Enrypt & Decrypt

a block (AES)
- Crypto101, by van Houtven, Chapter 6 (15 ½pages, ~7 pages)
a stream of blocks (CBC)
- Crypto101, by van Houtven, Chapter 7 sections 7.1-7.9 and 7.14-7.16 (30 ½pages, ~15 pages)
a stream (Salsa20)
- Crypto101, by van Houtven, Chapter 7 sections 7.10-7.13 and 7.17 (16 ½pages, ~8pages)

Key Exchange (Diffie-Hellman)

Crypto101, by van Houtven, Chapter 8 but skip 8.4 (7 ½pages, ~4 pages)

Lecture

Slides
Video

Exercise

Exercise 3 is meant for the next session.

Further Reading

Crypto in 45 minutes, by Laurens Van Houtven (lvh) (45:38)
Cryptography: Crash Course Computer Science (12:32)
Crypto Museum
One-Time Pad (2:55)
Pseudorandom Number Generators (6:40)
AES - a Stick-Figure Guide
AES, by Computerphile (14:13)
CBC-mode (1:57)
CTR-mode ("jump"-able) (3:12)
Key Exchange: Diffie-Hellman (8:37)