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Liaison statement
LS/r on Cryptographic Message Syntax (reply to IETF Security Area)

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State Posted
Submitted Date 2015-04-22
From Group ITU-T-SG-17
From Contact Martin Euchner
To Group SEC
To Contacts Stephen Farrell <>
Kathleen Moriarty <>
Cc The IETF Chair <>
A Kremer <>
Koji Nakao <>
Anthony Rutkowski <>
Scott Mansfield <>
Response Contact
Technical Contact
Purpose For action
Deadline 2015-08-31 Action Taken
Attachments LS/r on Cryptographic Message Syntax (reply to IETF Security Area)
Liaisons referred by this one Security Area Response to Liaison on Cryptographic Message Syntax
Liaisons referring to this one Follow-up on Cryptographic Message Syntax communications
ITU-T SG17, Security, thanks IETF Security Area for the liaison response about
our draft Recommendation ITU-T X.cms. The main reason for the development of
X.cms is to have an ITU-T Recommendation containing all the ASN.1 modules which
are needed to implement Cryptographic Message Syntax with no obsolete ASN.1
features like “ANY DEFINED BY”. For ITU-T to make references, we need CMS with
ASN.1 specifications conform to the in force Edition of Rec. ITU-T X.680 series.

We decided to postpone the Consent of draft Recommendation ITU-T X.cms to have
the time to investigate the possibility to have an updated IETF RFC that
fulfils our requirements. Our ASN.1 experts offer to participate in the work on
producing that IETF RFC.