Summary for Week 6

• Lecture 10: We discussed the random-oracle model (ROM) for hash functions. In the context of ROM, we covered the birthday attack on hash functions. We discussed MD-5.
  Date: Tu, 10/17/07.
• Lecture 11: We briefly discussed SHA-1. We covered HMAC, which allows one to use any public hash function as a MAC. The last 30 minutes of the lecture were devoted to review for the midterm.
  Date: Th, 10/19/2007.