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Protocol Action: 'X.509 Certificate Extension for S/MIME Capabilities' to Proposed Standard
The IESG has approved the following document:
- 'X.509 Certificate Extension for S/MIME Capabilities '
<draft-ietf-smime-certcapa-05.txt> as a Proposed Standard
This document is the product of the S/MIME Mail Security Working Group.
The IESG contact persons are Russ Housley and Sam Hartman.
A URL of this Internet-Draft is:
This protocol provides an X.509 public key certificate extension to indicate
the end entity's S/MIME cryptographic capabilities. It is an optional,
Working Group Summary
Initially, the major discussion point was whether this mechanism, which is
considered a "static" mechanism, is better or worse than a more "dynamic"
mechanism, which could change without affecting the public key certificates
contents. The WG decided to allow for the possibility of another editor
could step for to define the "dynamic" mechanism, but that this "static"
mechanism should be allowed to proceed. The other discussions on the draft
were considered minor, mostly dealt with the security considerations
wording, and these issues were resolved quickly.
The protocol is implemented by one vendor already in a number of their
This document was reviewed by Russ Housley for the IESG.