[3] X.400
- [5] RFC 987 - Mapping between X.400 and RFC 822, 2021-01-31T12:05:01.000Z, 2021-03-13T07:30:36.509Z https://tools.ietf.org/html/rfc987#page-20
- [4] RFC 1138 - Mapping between X.400(1988) / ISO 10021 and RFC 822, 2021-01-31T11:41:52.000Z, 2021-03-13T07:30:03.706Z https://tools.ietf.org/html/rfc1138#section-3.3.5
- [6] RFC 1148 - Mapping between X.400(1988) / ISO 10021 and RFC 822, 2021-02-21T20:28:49.000Z, 2021-03-13T07:35:42.733Z https://tools.ietf.org/html/rfc1148#section-3.3.5
- [7] RFC 1327 - Mapping between X.400(1988) / ISO 10021 and RFC 822, 2021-02-21T20:58:05.000Z, 2021-03-13T09:42:54.093Z https://tools.ietf.org/html/rfc1327#section-3.3.5
- [8] RFC 2156 - MIXER (Mime Internet X.400 Enhanced Relay): Mapping between X.400 and RFC 822/MIME, 2021-03-14T09:07:09.000Z, 2021-03-23T12:26:00.379Z https://tools.ietf.org/html/rfc2156#section-3.3.5

[1] RFC 5280 - Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile (2015-02-22 15:44:10 +09:00 版) http://tools.ietf.org/html/rfc5280#section-4.1.2.5.1

[2] RFC 4517 - Lightweight Directory Access Protocol (LDAP): Syntaxes and Matching Rules (2015-03-08 19:15:43 +09:00 版) http://tools.ietf.org/html/rfc4517#section-3.3.34

[9] rfc3852, 2021-07-05T05:43:04.000Z https://datatracker.ietf.org/doc/html/rfc3852#section-11.3

[12]

RFC 5280 - Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile (2015-02-22 15:44:10 +09:00 版) http://tools.ietf.org/html/rfc5280#section-4.1.2.5.1

Conforming systems MUST interpret the year field (YY) as follows:
Where YY is greater than or equal to 50, the year SHALL be interpreted as 19YY; and
Where YY is less than 50, the year SHALL be interpreted as 20YY.