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Secure Multipurpose Internet Mail Extensions

nounid 4010·updated May 9, 2026
verified

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

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

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

Sensitivity

unclassified

Information Class

unclassified

Variants

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

Framework definitions

ISACA Cybersecurity Glossary1 senseview framework →
§1
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)
NISTIR 7298: Glossary of Key Information Security Terms, Revision 21 senseview framework →
§1
A set of specifications for securing electronic mail. S/MIME is based upon the widely used MIME standard [MIME] and describes a protocol for adding cryptographic security services through MIME encapsulation of digitally signed and encrypted objects. The basic security services offered by S/MIME are authentication, non-repudiation of origin, message integrity, and message privacy. Optional security services include signed receipts, security labels, secure mailing lists, and an extended method of identifying the signer’s certificate(s).
CNSSI-4009 (Glossary of Information Assurance Terms)1 senseview framework →
§1
A set of specifications for securing electronic mail. S/MIME is based upon the widely used MIME standard [MIME] and describes a protocol for adding cryptographic security services through MIME encapsulation of digitally signed and encrypted objects. The basic security services offered by S/MIME are authentication, non-repudiation of origin, message integrity, and message privacy. Optional security services include signed receipts, security labels, secure mailing lists, and an extended method of identifying the signer’s certificate(s).
NIST SP 800-491 senseview framework →
§1
A set of specifications for securing electronic mail. S/MIME is based upon the widely used MIME standard [MIME] and describes a protocol for adding cryptographic security services through MIME encapsulation of digitally signed and encrypted objects. The basic security services offered by S/MIME are authentication, non-repudiation of origin, message integrity, and message privacy. Optional security services include signed receipts, security labels, secure mailing lists, and an extended method of identifying the signer’s certificate(s).
Legacy lexicon import1 senseview framework →
§1 · legacy_primary
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)
DR-088 backfill from the noun definition column

Outgoing relationships

No outgoing triples
This term is not the subject of any RDF-style relationship yet.

Incoming relationships

No incoming triples
No other term currently asserts a relationship to this one.