Keyusage - Netscape MANAGEMENT SYSTEM 4.5 - PLUG-IN Manual

Reference
http://www.ietf.org/rfc/rfc2459.txt
Criticality
PKIX Part 1 recommends that this extension be marked noncritical.
Discussion
The Issuer Alternative Name extension is used to associate Internet-style identities
with the certificate issuer. Names must use the forms defined for subjectAltName.
CMS Version Support
Refer to "IssuerAltNameExt Plug-in Module" on page 182.
• CMS 4.1: Not supported
• CMS 4.2: Supported
• CMS 4.2-SP2: Supported
Netscape Recommendation
Netscape products do not examine this extension.
Microsoft Recommendation
Microsoft products do not examine this extension. Microsoft recommends that, for
the purposes of building certificate chains, authorityKeyIdentifier be used rather
than issuerAltName or the certificate's issuer name.

keyUsage

OID
2.5.29.15
Reference
http://www.ietf.org/rfc/rfc2459.txt
Criticality
This extension may be critical or noncritical. PKIX Part 1 recommends that it
should be marked critical if it is used.
Standard X.509 v3 Certificate Extensions
4.2.1.8
4.2.1.3
Appendix C Certificate and CRL Extensions 349