METHOD AND APPARATUS FOR OPTIMIZING ADVANCED ENCRYPTION STANDARD (AES) ENCRYPTION AND DECRYPTION IN PARALLEL MODES OF OPERATION

摘要

A method and an apparatus for optimizing advanced encryption standard encryption and decryption in parallel modes of operation are provided to accomplish reduction of total latency required for performing AES encryption/decryption calculation. A plurality of data blocks to be performed encryption and decryption are stored in a plurality of registers(300). A calculation in round 0 is successively performed about each of the different data blocks of k stored in 128-bit registers of k(302). The AES(Advanced Encryption Standard) round instruction which is identical to the other rounds is dispatched(304). If there is the other round to the AES calculation, the processing step moves forward the third step(306). If there is no other data blocks processed about the AES calculation, the result of the AES calculation is returned(308,310).