S-box

noun

(cryptography) A basic component of symmetric-key algorithms, which performs substitution, transforming one set of bits into another.

The S-box is a crucial component in modern cryptography.

意味（1）

(cryptography) A basic component of symmetric-key algorithms, which performs substitution, transforming one set of bits into another.

In block ciphers, S-boxes are typically used to obscure the relationship between the key and the ciphertext.