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When I use HMAC-RIPEMD-160, is the size of the header encryption key only 160 bits?

April 26, 2017Bits encryption header hmac-ripemd-160 key size

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When I use HMAC-RIPEMD-160, is the size of the header encryption key only 160 bits?

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No, TrueCrypt never uses an output of a hash function (nor of a HMAC algorithm) directly as an encryption key. See the section Header Key Derivation, Salt, and Iteration Count in the documentation for more information.