An apparatus and method for implementing a hash algorithm word buffer. In one embodiment, a cryptographic unit may include hash logic configured to compute a hash value of a data block according to a hash algorithm, where the hash algorithm includes a plurality of iterations, and where the data block includes a plurality of data words. The cryptographic unit may further include a word buffer comprising a plurality of data word positions and configured to store the data block during computing by the hash logic, where subsequent to the hash logic computing one of the iterations of the hash algorithm, the word buffer is further configured to linearly shift the data block by one or more data word positions according to the hash algorithm. The hash algorithm may be dynamically selectable from a plurality of hash algorithms.

 
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