* 仕様書

[REFS[
- [4] [CITE@en[RFC 5280 - Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile]] ([TIME[2018-08-26 16:15:03 +09:00]]) <https://tools.ietf.org/html/rfc5280#section-4.1>
-- [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) <https://tools.ietf.org/html/rfc5280#section-4.1.2.7>'''
- [2] [CITE@en[RFC 7468 - Textual Encodings of PKIX, PKCS, and CMS Structures]] ([TIME[2015-04-20 12:22:43 +09:00]] 版) <https://tools.ietf.org/html/rfc7468#section-13>
]REFS]

* 値

[FIG(short list)[ [6] 一般的なアルゴリズム識別子
- [CODE[1.2.840.113549.1.1.5]] ([[RSA]])
- [CODE[1.2.840.10045.2.1]] ([[EC]])
]FIG]

[FIG(short list)[ [8] [CODE[1.2.840.10045.2.1]] ([[EC]]) の時よく指定される [CODE[parameters]] の [[OID]]
- [CODE[1.2.840.10045.3.1.7]] ([[prime256v1]])
- [CODE[1.3.132.0.34]] ([[secp384r1]])
- [CODE[1.3.132.0.35]] ([[secp521r1]])
]FIG]


* 関連

[3] [SEE[ [[SPKI Fingerprint]] ([[PKP]] で使われる)、 [[signatureAlgorithm]] ]]

* メモ

[7] [CITE@ja[自堕落な技術者の日記 : 世の中のDSAやECDSA公開鍵のサーバー証明書の利用状況 - livedoor Blog(ブログ)]]
([TIME[2018-09-06 12:53:01 +09:00]])
<http://blog.livedoor.jp/k_urushima/archives/1764230.html>