Coursera cryptography notes

https://www.coursera.org/learn/crypto

W1S5
1. Problems with RC4 (used in HTTPS/WEP), some bytes have higher prob
of being 0.
2. CSS(Content scrambling system) used for DVDs, Bluetooth, GSM -
implemented in hardware is badly broken. It uses LFSR. US allowed
export of crypto algorithms which weren't more than 40 bits. Hence DVD
manufacturers were constrained.

3. Modern stream ciphers - eStream - Salsa20(elegant) Sosemanuk