Tuesday, November 10, 2009

Section 8.3 and 9.5, due November 11

I thought that it was kind of hard to understand how exactly the SHA-1 algorithm works. It reminds me a lot of DES and AES where we are just doing a bunch of operations to make things hard to compute backwards.

The Digital Signature Algorithm was a lot easier and simpler to understand. I was wondering if there are any algorithms for digital signatures that don't depend on modular arithmetic. They also talked about the NIST adopting it as a standard. Did they have one before 1991? This book is three years old, so are there other algorithms being considered to replace it currently?

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