1. I have difficulty seeing how errors are generated in the encryption process, for this reason, I have some trouble seeing the difference in the ability of the OFB to be better at error correction than the other modes. To me it seems as though if you program a computer to do something it does it exactly as it was told, so if there were errors, than the encryption prgram needs to be modified. I also had b it of trouble following the password security sections. I think my brain was shot after trying to follow the modes of operation. I think an example would be nice.
2. I found the section about breaking DES interesting, especially that even though it was known that DES was weak and vulnerable, it was still about for over 10 years. It is amazing to see the the difference in technology from when Rocke Verser broke the DES in '97 to the 39 days it took in '98.
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