S-box

//ˈɛsˌbɒks// noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    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."

Example

More examples

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

Etymology

Short for substitution box.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.