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substitution box (S-Box)

Substitution box is an encryption method that works according to the substitution cipher. It uses a character list in which an entered character is replaced by another one. This list is also known as substitution box or S-box.

Substitution box S1 of the DES algorithm

Substitution box S1 of the DES algorithm

In the substitution box, matrices of data words with a keyword of the same length as the data word are combined in a logical operation to form a new data word. An XOR operation is usually used as the logical operation.

Depending on the method, the character lists are specified in the standard, as in the DES algorithm.

Englisch: substitution box - S-Box
Updated at: 26.12.2011
#Words: 101
Links: box, encryption method, substitution cipher, also known as (aka), indium (In)
Translations: DE

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