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Block cipher

nounid 1686·updated May 9, 2026
verified

A symmetric key cryptographic algorithm that transforms a block of information at a time using a cryptographic key. For a block cipher algorithm, the length of the input block is the same as the length of the output block.

MWE

Attested in

No recorded attestations. They are written when an MWE tagging stage is completed, stamped with the pack version and the document’s digest.

Classifications

Entity Type

Capability72%llm-generatedllm:claude-haiku-4-5

Sensitivity

unclassified

Information Class

unclassified

Variants

plural
Block ciphers
possessive
Block cipher's
pluralpossessive
Block ciphers'

Framework definitions

SANS Glossary of Security Terms1 senseview framework →
§1
A block cipher encrypts one block of data at a time.
ISACA Cybersecurity Glossary1 senseview framework →
§1
A public algorithm that operates on plaintext in blocks (strings or groups) of bits
NISTIR 7298: Glossary of Key Information Security Terms, Revision 21 senseview framework →
§1
A symmetric key cryptographic algorithm that transforms a block of information at a time using a cryptographic key. For a block cipher algorithm, the length of the input block is the same as the length of the output block.
NIST SP 800-901 senseview framework →
§1
A symmetric key cryptographic algorithm that transforms a block of information at a time using a cryptographic key. For a block cipher algorithm, the length of the input block is the same as the length of the output block.
Legacy lexicon import1 senseview framework →
§1 · legacy_primary
A symmetric key cryptographic algorithm that transforms a block of information at a time using a cryptographic key. For a block cipher algorithm, the length of the input block is the same as the length of the output block.
DR-088 backfill from the noun definition column

Outgoing relationships

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Incoming relationships

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