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Tagged with key-check-value known-plaintext-attack
2 questions
12
votes
1
answer
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Sending KCV (key check value) with cipher text
I was wondering why it is not more common to send the KCV of a secret key together with the cipher text. I see many systems that send cipher text and properly prepend the IV to e.g. a CBC mode ...
- 94.5k
11
votes
2
answers
3k
views
KCV and compatibility with block cipher modes of operation
There has been lately a question on KCV (key check value), value provided by many CRYPTOKI (PKCS#11) implementations. I don't particularly like KCV, but I decided to ask about proper use of KCV.
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