S-box

E663890

cryptographic primitive nonlinear component substitution box

An S-box (substitution box) is a fundamental nonlinear component in many block ciphers that maps input bits to output bits to provide confusion and resist cryptanalysis.

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Observed surface forms (1)

Surface form	Occurrences
S-boxes	1

Statements (50)

Predicate	Object
instanceOf	cryptographic primitive ⓘ nonlinear component ⓘ substitution box ⓘ
canBe	fixed ⓘ key-dependent ⓘ randomly generated ⓘ
canBeRepresentedAs	lookup table ⓘ set of Boolean functions ⓘ truth table ⓘ
componentOf	Feistel network NERFINISHED ⓘ Substitution–Permutation Network NERFINISHED ⓘ
designedTo	resist cryptanalysis ⓘ
fieldOfStudy	cryptanalysis ⓘ symmetric-key cryptography ⓘ
hasDesignCriterion	balanced output bits ⓘ bit independence criterion ⓘ good avalanche effect ⓘ high algebraic degree ⓘ high nonlinearity ⓘ low differential uniformity ⓘ low linear approximation probability ⓘ no fixed points ⓘ no opposite fixed points ⓘ strict avalanche criterion ⓘ
hasInputSize	n bits ⓘ
hasOutputSize	m bits ⓘ
hasProperty	bitwise substitution ⓘ many-to-many mapping ⓘ nonlinear Boolean functions ⓘ nonlinearity ⓘ
maps	input bits to output bits ⓘ
mayBe	bijective ⓘ non-bijective ⓘ
provides	confusion ⓘ
usedFor	resistance to algebraic attacks ⓘ resistance to differential cryptanalysis ⓘ resistance to higher-order differential attacks ⓘ resistance to interpolation attacks ⓘ resistance to linear cryptanalysis ⓘ
usedIn	block cipher ⓘ
usedInCipher	Advanced Encryption Standard NERFINISHED ⓘ Blowfish NERFINISHED ⓘ CAST-128 NERFINISHED ⓘ Camellia NERFINISHED ⓘ Data Encryption Standard NERFINISHED ⓘ GOST 28147-89 NERFINISHED ⓘ KASUMI NERFINISHED ⓘ PRESENT ⓘ Serpent NERFINISHED ⓘ Twofish NERFINISHED ⓘ

Referenced by (2)

Full triples — surface form annotated when it differs from this entity's canonical label.

Substitution–permutation network → hasPart → S-box ⓘ

Data Encryption Standard → designFeature → S-box ⓘ

this entity surface form: S-boxes