| 摘要 |
A one-way hash algorithm is implemented in hardware and/or software. The hash algorithm creates a message digest from an input message. During one 16-operation round of the hash algorithm, a front computation process (202, Figure 2) computes a portion of a first operation. Then a systolic computation process (204, Figure 2) computes the remainder of the first operation and the next fifteen operations to complete the round. The systolic computation process pre-calculates (325, Figure 3) a portion of the next round in parallel with the completion of the current round. Because the systolic computation process has a shallower logic depth, and because certain calculations are done in parallel, an approximately four times reduction in the time to compute one round algorithm is identical to a message digest computed using a conventional MD5 implementation, when given the same input message. |
