Research Article
A Very Compact AES-SPIHT Selective Encryption Computer Architecture Design with Improved S-Box
Table 5
The comparison of different S-boxes.
| | Basis | Type | XOR | XNOR | NAND/AND | NOT | MUX | Total gates |
| Our work
(straight-line) | Merged | 107 | 4 | 32 | — | 16 | 159 | | — | — | — | — | — | — | — | | — | — | — | — | — | — | — |
| Our work
(alternative block sharing) | Merged | 93 | 4 | 32 | — | 16 | 145 | | — | — | — | — | — | — | — | | — | — | — | — | — | — | — |
| Our work
(independent ALU) | Merged | 93 | 4 | 32 | — | — | 129 | | — | — | — | — | — | — | — | | — | — | — | — | — | — | — |
| | Boyar (single S-box) | — | — | — | — | — | — | — | | S-box | 79 | 4 | 32 | — | — | 115 | | — | — | — | — | — | — | — |
| | Boyar (complete) (newer) | Merged | 144 | 14 | 34 | — | 16 | 208 | | S-box | 90 | 4 | 34 | — | — | 128 | | Inv S-box | 83 | 10 | 34 | — | — | 127 |
| | Edwin | — | — | — | — | — | — | — | | S-box | 193 | — | 45 | — | — | 238 | | — | — | — | — | — | — | — |
| | Canright | Merged | 107 | 0 | 36 | 2 | 16 | 253 | | S-box | 91 | 0 | 36 | 0 | 0 | 195 | | Inv S-box | 91 | 0 | 36 | 0 | 0 | 195 |
| | Mentens | Merged | 118 | 0 | 36 | 0 | 16 | 271 | | S-box | 96 | 0 | 36 | 0 | 0 | 204 | | Inv S-box | 97 | 0 | 36 | 0 | 0 | 206 |
| | Satoh | Merged | 119 | 0 | 36 | 3 | 16 | 275 | | S-box | 100 | 0 | 36 | 0 | 0 | 211 | | Inv S-box | 99 | 0 | 36 | 0 | 0 | 209 |
| | Worst | Merged | 131 | 0 | 36 | 0 | 16 | 293 | | S-box | 107 | 0 | 36 | 0 | 0 | 223 | | Inv S-box | 106 | 0 | 36 | 0 | 0 | 222 |
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