RFC 3851: Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.1 Message Specification

This document defines Secure/Multipurpose Internet Mail Extensions (S/MIME) version 3.1. S/MIME provides a consistent way to send and receive secure MIME…

Read RFC 3851 on the RFC Editor

Outgoing relationships (18 related RFCs)

Obsoletes — RFC 2633: S/MIME Version 3 Message Specification
Normative reference — RFC 2045: Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies
Normative reference — RFC 2046: Multipurpose Internet Mail Extensions (MIME) Part Two: Media Types
Normative reference — RFC 2047: MIME (Multipurpose Internet Mail Extensions) Part Three: Message Header Extensions for Non-ASCII Text
Normative reference — RFC 3852: Cryptographic Message Syntax (CMS)
Normative reference — RFC 2634: Enhanced Security Services for S/MIME
Normative reference — RFC 3370: Cryptographic Message Syntax (CMS) Algorithms
Normative reference — RFC 2049: Multipurpose Internet Mail Extensions (MIME) Part Five: Conformance Criteria and Examples
Normative reference — RFC 2183: Communicating Presentation Information in Internet Messages: The Content-Disposition Header Field
Normative reference — RFC 1847: Security Multiparts for MIME: Multipart/Signed and Multipart/Encrypted
Normative reference — RFC 3565: Use of the Advanced Encryption Standard (AES) Encryption Algorithm in Cryptographic Message Syntax (CMS)
Normative reference — RFC 3850: Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.1 Certificate Handling
Normative reference — RFC 3274: Compressed Data Content Type for Cryptographic Message Syntax (CMS)
Informative reference — RFC 1750: Randomness Recommendations for Security
Informative reference — RFC 2315: PKCS #7: Cryptographic Message Syntax Version 1.5
Informative reference — RFC 2311: S/MIME Version 2 Message Specification
Informative reference — RFC 2785: Methods for Avoiding the "Small-Subgroup" Attacks on the Diffie-Hellman Key Agreement Method for S/MIME
Informative reference — RFC 3218: Preventing the Million Message Attack on Cryptographic Message Syntax

Incoming relationships (50 related RFCs)

Obsoleted by, Informatively referenced by — RFC 5751: Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.2 Message Specification
Normatively referenced by — RFC 4975: The Message Session Relay Protocol (MSRP)
Normatively referenced by — RFC 3903: Session Initiation Protocol (SIP) Extension for Event State Publication
Normatively referenced by — RFC 5911: New ASN.1 Modules for Cryptographic Message Syntax (CMS) and S/MIME
Normatively referenced by — RFC 3850: Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.1 Certificate Handling
Normatively referenced by — RFC 4976: Relay Extensions for the Message Sessions Relay Protocol (MSRP)
Normatively referenced by — RFC 4661: An Extensible Markup Language (XML)-Based Format for Event Notification Filtering
Normatively referenced by — RFC 3923: End-to-End Signing and Object Encryption for the Extensible Messaging and Presence Protocol (XMPP)
Normatively referenced by — RFC 4660: Functional Description of Event Notification Filtering
Normatively referenced by — RFC 5275: CMS Symmetric Key Management and Distribution
Normatively referenced by — RFC 5547: A Session Description Protocol (SDP) Offer/Answer Mechanism to Enable File Transfer
Normatively referenced by — RFC 4823: FTP Transport for Secure Peer-to-Peer Business Data Interchange over the Internet
Normatively referenced by — RFC 5621: Message Body Handling in the Session Initiation Protocol (SIP)
Normatively referenced by — RFC 4160: Internet Fax Gateway Requirements
Normatively referenced by — RFC 5008: Suite B in Secure/Multipurpose Internet Mail Extensions (S/MIME)
Normatively referenced by — RFC 5432: Quality of Service (QoS) Mechanism Selection in the Session Description Protocol (SDP)
Informatively referenced by — RFC 5652: Cryptographic Message Syntax (CMS)
Informatively referenced by — RFC 4949: Internet Security Glossary, Version 2
Informatively referenced by — RFC 5598: Internet Mail Architecture
Informatively referenced by — RFC 5405: Unicast UDP Usage Guidelines for Application Designers
Informatively referenced by — RFC 4568: Session Description Protocol (SDP) Security Descriptions for Media Streams
Informatively referenced by — RFC 4572: Connection-Oriented Media Transport over the Transport Layer Security (TLS) Protocol in the Session Description Protocol (SDP)
Informatively referenced by — RFC 9052: CBOR Object Signing and Encryption (COSE): Structures and Process
Informatively referenced by — RFC 4408: Sender Policy Framework (SPF) for Authorizing Use of Domains in E-Mail, Version 1
Informatively referenced by — RFC 4412: Communications Resource Priority for the Session Initiation Protocol (SIP)
Informatively referenced by — RFC 4954: SMTP Service Extension for Authentication
Informatively referenced by — RFC 4662: A Session Initiation Protocol (SIP) Event Notification Extension for Resource Lists
Informatively referenced by — RFC 4871: DomainKeys Identified Mail (DKIM) Signatures
Informatively referenced by — RFC 5655: Specification of the IP Flow Information Export (IPFIX) File Format
Informatively referenced by — RFC 4073: Protecting Multiple Contents with the Cryptographic Message Syntax (CMS)
Informatively referenced by — RFC 4870: Domain-Based Email Authentication Using Public Keys Advertised in the DNS (DomainKeys)
Informatively referenced by — RFC 5750: Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.2 Certificate Handling
Informatively referenced by — RFC 5485: Digital Signatures on Internet-Draft Documents
Informatively referenced by — RFC 5703: Sieve Email Filtering: MIME Part Tests, Iteration, Extraction, Replacement, and Enclosure
Informatively referenced by — RFC 4398: Storing Certificates in the Domain Name System (DNS)
Informatively referenced by — RFC 4796: The Session Description Protocol (SDP) Content Attribute
Informatively referenced by — RFC 5039: The Session Initiation Protocol (SIP) and Spam
Informatively referenced by — RFC 5126: CMS Advanced Electronic Signatures (CAdES)
Informatively referenced by — RFC 5536: Netnews Article Format
Informatively referenced by — RFC 5585: DomainKeys Identified Mail (DKIM) Service Overview
Informatively referenced by — RFC 3853: S/MIME Advanced Encryption Standard (AES) Requirement for the Session Initiation Protocol (SIP)
Informatively referenced by — RFC 3926: FLUTE - File Delivery over Unidirectional Transport
Informatively referenced by — RFC 4356: Mapping Between the Multimedia Messaging Service (MMS) and Internet Mail
Informatively referenced by — RFC 4161: Guidelines for Optional Services for Internet Fax Gateways
Informatively referenced by — RFC 4590: RADIUS Extension for Digest Authentication
Informatively referenced by — RFC 7107: Object Identifier Registry for the S/MIME Mail Security Working Group
Informatively referenced by — RFC 9788: Header Protection for Cryptographically Protected Email
Informatively referenced by — RFC 3910: The SPIRITS (Services in PSTN requesting Internet Services) Protocol
Informatively referenced by — RFC 5616: Streaming Internet Messaging Attachments
Informatively referenced by — RFC 7114: Creation of a Registry for smime-type Parameter Values