| Substitution-permutation Network |
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Information AboutSubstitution-permutation Network |
| CATEGORIES ABOUT SUBSTITUTION-PERMUTATION NETWORK | |
| cryptographic algorithms | |
| block ciphers | |
| permutations | |
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These networks consist of S-box es and P-boxes that transform blocks of input Bit s into output bits. It is common for these transformations to be operations that are efficient to perform in hardware, such as Exclusive Or (XOR). S-boxes substitute or transform input bits into output bits. A good S-box will have the property that changing one input Bit will change about half of the output bits. It will also have the property that each output bit will depend on every input bit. P-boxes permute or transpose bits across S-box inputs. In addition, at each round the Key is combined using some group operation, typically XOR. See also |
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