Research Article
A Very Compact AES-SPIHT Selective Encryption Computer Architecture Design with Improved S-Box
Table 4
The CISA instruction sets break down.
| | Operation | Function code (2-bit MSB) | Instruction format |
| | SBN (Subtract and Branch if Negative) | 00 | (0 at address A), address B, Target | | XOR | 01 | (1 at address A), address B, Target | | Time | 10 | 10 at , address B, Target | | SubBytes | 11 | 11 at , address B, Target |
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