To my knowledge, no interoperability testing has been performed of signedData
or envelopedData content types including
ACs. There are no ACs included in the Examples of S/MIME Messages
Internet-Draft. Also, there are no ACs included in the
test messages documented in Jim Schaad's interoperability matrix for RFCs
2630 through 2634 (available from
Well I've never seen any public examples of attribute certificates in
any context. I've been sent a few in private email (on the understanding
that they weren't redistributed) but so far they've all been broken and
would typically cause an ASN1 parser to choke.
Dr Stephen N. Henson. http://www.drh-consultancy.demon.co.uk/
Personal Email: shenson(_at_)drh-consultancy(_dot_)demon(_dot_)co(_dot_)uk
Senior crypto engineer, Celo Communications: http://www.celocom.com/
Core developer of the OpenSSL project: http://www.openssl.org/
Business Email: drh(_at_)celocom(_dot_)com PGP key: via homepage.