[Smcwg-public] Audit Schem of a S/MIME CA

[陳立群]

I wonder the audit schema of an issuing CA issue S/MIME certificate as the
issuing CA 2 (S/MIME Certificates) in upper diagram of page 10 of WebTrust
for CA 2.2
(https://www.cpacanada.ca/-/media/site/operational/ms-member-services/docs/w
ebtrust/webtrust-for-ca-22.pdf?la=en
<https://www.cpacanada.ca/-/media/site/operational/ms-member-services/docs/w
ebtrust/webtrust-for-ca-22.pdf?la=en&hash=76D4C1F8363D563CE7FC09031E54ACA2EB
FE3E3A> &hash=76D4C1F8363D563CE7FC09031E54ACA2EBFE3E3A) .

 

From the WebTrust for Certification Authorities - Audit Applicability Matrix
(https://www.cpacanada.ca/en/business-and-accounting-resources/audit-and-ass
urance/overview-of-webtrust-services/principles-and-criteria ) or as
attached file, this issuing CA2  (S/MIME Certificates) belong to
“Publicly-Trusted Commercial PKI - All other uses” or  “Publicly-Trusted
Government PKI - All other uses” , so the audit scheme should be RKGC, Key
Protection and WebTrust.

 

But someone may argue as the Root CA in upper diagram of page 10 of WebTrust
for CA 2.2 has website and e-mail trust bits. The issuing CA 2 (S/MIME
Certificates should pass WebTurst for CA-SSL BR with Network Security Audit
Criteria Principles 4.  I see
<https://www.cpacanada.ca/-/media/site/operational/ms-member-services/docs/w
ebtrust/wtbr-241-final--ssl-baseline-with-network-security-june-30-2019.pdf?
la=en&hash=15117D0B4FB70FB113C7D1D88802A26FE820FB60> WebTrust Principles and
Criteria for Certification Authorities – SSL Baseline with Network Security
– Version 2.4.1 page 3. It said that  “However, the Network Security
Requirements (Principle 4) would apply to all CAs – Root CA, CA 1, CA 2, CA
3, and CA 4.”. Note that CA-3 is a S/MIME CA. 

                      

    I wonder to know certificate consumers member and CPA Canada’s opinion.


 

    Thanks.

 

          Li-Chun Chen 

          Chunghwa Telecom 



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