Summary for Week 3

• Lecture 5: We finished discussion on modes of operation CBC, OFB, CFB, and CTR. We covered 2DES and 3DES. We discussed "meet-in-the-middle" attack on 2DES. We discussed the extended gcd algorithm.
  Date: Th, 09/25/2007.
  Reading assignment: Read the output feedback mode (mode). Get familiar with the GCD algorithm.
• Note: There was no class on this day. (Instructor was traveling).
  Date: Tu, 09/27/2007.