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IETF RFC 5752
[ACTIVE]

Multiple Signatures in Cryptographic Message Syntax (CMS)

Metadata

Publisher
IETF
Doc Type
Standard
Pages
17
Abstract
Cryptographic Message Syntax (CMS) SignedData includes the SignerInfo structure to convey per-signer information. SignedData supports multiple signers and multiple signature algorithms per signer with multiple SignerInfo structures. If a signer attaches more than one SignerInfo, there are concerns that an attacker could perform a downgrade attack by removing the SignerInfo(s) with the \'strong' algorithm(s). This document defines the multiple-signatures attribute, its generation rules, and its processing rules to allow signers to convey multiple SignerInfo objects while protecting against downgrade attacks. Additionally, this attribute may assist during periods of algorithm migration. [STANDARDS-TRACK]
Publication Date
2010-01-01
Status Note
Proposed Standard
DOI
10.17487/RFC5752
Link
https://doi.org/10.17487/RFC5752
Author(s)
Sean Turner
Jim Schaad
Keyword(s)
Downgrade Attack, Algorithm Migration
Latest version of IETF RFC 5752

Document Versions — IETF RFC 5752

  • ▶ IETF RFC 5752 (2010-01-01)
    THIS DOC [ACTIVE] [LATEST VERSION]

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IETF RFC 5752, Multiple Signatures in Cryptographic Message Syntax (CMS). Available at https://doi.org/10.17487/RFC5752
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IETF RFC 5752, Multiple Signatures in Cryptographic Message Syntax (CMS). Available at https://doi.org/10.17487/RFC5752

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IETF RFC 5752, Multiple Signatures in Cryptographic Message Syntax (CMS). Available at https://doi.org/10.17487/RFC5752
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<span class="citation"><cite>IETF RFC 5752</cite>, Multiple Signatures in Cryptographic Message Syntax (CMS). Available at <a href="https://doi.org/10.17487/RFC5752" target="_blank" rel="noopener">https://doi.org/10.17487/RFC5752</a></span>

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IETF RFC 5752, Multiple Signatures in Cryptographic Message Syntax (CMS)
doi: 10.17487/RFC5752
url: https://doi.org/10.17487/RFC5752
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<cite id="bib-rfc5752">IETF RFC 5752</cite>, Multiple Signatures in Cryptographic Message Syntax (CMS)
<span class="doi">10.17487/RFC5752</span>
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