Secure Multipurpose Internet Mail Extensions

nouncandidate·updated May 9, 2026

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Provides cryptographic security services for electronic messaging applications: authentication, message integrity and non-repudiation of origin (using digital signatures) and privacy and data security (using encryption) to provide a consistent way to send and receive MIME data. (RFC 2311)

MWE

Classifications

per-axis with provenance

Entity Type

Control85%llm-generatedllm:claude-haiku-4-5

?unassignedlast reviewed —

Sensitivity

unclassified

Information Class

unclassified

Variants

4 surface forms

acronym: S/MIME
plural: Secure Multipurpose Internet Mail Extensionses
possessive: Secure Multipurpose Internet Mail Extensions's
pluralpossessive: Secure Multipurpose Internet Mail Extensionses'

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