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Crypto U4, Block Cipher, Cipher Feedback Mode (CFB)

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Crypto U6, computing HMAC

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IYM002 Note on Crypto U6, computing HMAC, created by jjanesko on 11/05/2013.

Note by jjanesko, updated more than 1 year ago

	Created by jjanesko about 12 years ago

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How to compute an HMACYou need to keys, let's call them K1 and K2. Concatenate K2 with the message and then compute the hash of this. Then take K1, concatenate it with the result from step 1 and hash this value. Ultimately, it looks like this: h( K1 || h( K2 || m) )

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