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FIPS 198-1, The Keyed-Hash Message Authentication Code …

FIPS 198-1, The Keyed-Hash Message Authentication Code …

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Approved Hash Algorithms. When an application uses a longer than K B-bytes, then it shall first hash the K using H and then use the resultant L-byte string as the key K0; detail can be found in Table 1 in Section 4 below. 4. HMAC SPECIFICATION . To compute a MAC over the data ‘text’ using the HMAC function, the following operation is performed:

  Table, Fips, Hash

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