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Results tagged with mac
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user 96435
(or message authentication code), a short piece of information used to authenticate a message, and the algorithm to create and check such information, using a secret key.
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Is $H(k || m) \oplus k$ secure?
It is known that $H(k || m)$ (when using SHA1) is an insecure MAC function since it is vulnerable to hash length extension.
But what about $H(k || m) \oplus k$? …
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