If Keccak isn't vulnerable to a length extension attack, is using it to hash a s... | Hacker News

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andreyf on Oct 3, 2012 | parent | context | favorite | on: NIST Selects Winner of Secure Hash Algorithm (SHA-...

If Keccak isn't vulnerable to a length extension attack, is using it to hash a secret key concatenated with a message a good MAC algorithm? If not, why not?

pjscott on Oct 3, 2012 [–]

According to the Keccak home page, it can be used for "keyed or randomized modes simply by prepending a key or salt to the input message."

http://keccak.noekeon.org/

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