I was interested to learn a little history about the breaking of DES. It is clear how hard it is to change the standard in encryption because of the many problems it solves. It is interesting to read about salt and how it can make DES more secure. I understand a little more why my passwords must be secure.
It was difficult to understand the different modes of operation, such as Cipher Feedback and Output feedback. I don't understand how the functions work.
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