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ITERATIVE CIPHER KEY-SCHEDULE CACHE FOR CACHING ROUND KEYS USED IN AN ITERATIVE ENCRYPTION/DECRYPTION SYSTEM AND RELATED METHODS
ITERATIVE CIPHER KEY-SCHEDULE CACHE FOR CACHING ROUND KEYS USED IN AN ITERATIVE ENCRYPTION/DECRYPTION SYSTEM AND RELATED METHODS
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机译：用于缓存迭代加密/解密系统和相关方法的缓存圆形键的迭代密钥调度缓存
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摘要
A key-schedule cache stores at least one key schedule based on a cipher key for data transformation using a block cipher. To obtain the round key for a data transformation, a key-word set, which may be a cipher key, including at least one round key is received in a round key control-circuit. The round key control-circuit determines whether the plurality of key words is already stored in the key-schedule cache and also determines whether the next round key, based on the key-word set, is also stored in the key-schedule cache. If the next round key is stored in the key-schedule cache, the round key control-circuit reads the next round key from the key-schedule cache and supplies the next round key to a next round key output. The round key control-circuit may also generate the next round key.
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