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918.txt
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918.txt
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[FIG(quote)[
[FIGCAPTION[
[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-4.1.2.6>
]FIGCAPTION]
> Legacy implementations exist where an electronic mail address is
> embedded in the subject distinguished name as an emailAddress
> attribute '''['''RFC2985''']'''. The attribute value for emailAddress is of type
> IA5String to permit inclusion of the character '@', which is not part
> of the PrintableString character set. emailAddress attribute values
> are not case-sensitive (e.g., "subscriber@example.com" is the same as
> "SUBSCRIBER@EXAMPLE.COM").
> Conforming implementations generating new certificates with
> electronic mail addresses MUST use the rfc822Name in the subject
> alternative name extension (Section 4.2.1.6) to describe such
> identities. Simultaneous inclusion of the emailAddress attribute in
> the subject distinguished name to support legacy implementations is
> deprecated but permitted.
]FIG]