A MAC is a keyed hash -- you can only compute it if you have the MAC key. | Hacker News

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		cperciva on June 25, 2009 \| parent \| context \| favorite \| on: Encrypt-then-MAC A MAC is a keyed hash -- you can only compute it if you have the MAC key.

lisper on June 25, 2009 [–]

Ah. Thanks. I knew I was missing something basic :-)

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