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user 351
History of cryptography and cryptanalysis. Questions that wish to ask about the history of cryptography should use this tag; if you're asking about historical ciphers you may also wish to use the classical-cipher tag.
9
votes
80-bit collision resistance because of 80-bit x87 registers?
The original SHA-1 and Skipjack specifications did not provide a justification for using a 80-bit key size, so we can only speculate about the reasons. However, it is important to understand that fro …
- 36.7k
31
votes
Accepted
What security authorities and standards reject $e=3$ in RSA, when, and with what rationale?
The advice to avoid $e=3$ comes down primarily to superstition, historical inertia, and general caution, rather than anything with a solid technical basis.
Historically, some of the early schemes tha …
- 36.7k