* 仕様書

[REFS[
- [1] '''[CITE@en[RFC 5280 - Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile]] ([TIME[2015-02-22 15:44:10 +09:00]] 版) <http://tools.ietf.org/html/rfc5280#section-4.1.2.4>'''
- [5] [CITE@en[RFC 5280 - Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile]] ([TIME[2015-02-22 15:44:10 +09:00]] 版) <http://tools.ietf.org/html/rfc5280#section-4.2.1.6>
]REFS]

* 構文

[2] 値は [[X.501 Name]] です [SRC[>>1]]。

* 文脈

[3] [[証明書]]の [CODE[[[TBSCertificate]]]] の[[欄]]の1つです。

[4] [[インターネット電子メールアドレス]]、[[DNS名]]、[[IPアドレス]]、[[URI]]
を [[subject]] とする時は、 [[SAN]] も使わなければ[['''なりません''']] [SRC[>>5]]。

[FIG(quote)[
[FIGCAPTION[
[6] ([TIME[2014-11-01 05:54:38 +09:00]] 版)
<https://cabforum.org/wp-content/uploads/BRv1.2.3.pdf#page=11>
]FIGCAPTION]

> Issuing CA: In relation to a particular Certificate, the CA that issued the Certificate. This could be either a Root
> CA or a Subordinate CA. 

]FIG]