[FIG(quote)[
[FIGCAPTION[
[1] [CITE@en[RFC 5246 - The Transport Layer Security (TLS) Protocol Version 1.2]]
([TIME[2015-02-19 08:58:15 +09:00]] 版)
<http://tools.ietf.org/html/rfc5246#page-79>
]FIGCAPTION]

> client
>       The application entity that initiates a TLS connection to a
>       server.  This may or may not imply that the client initiated the
>       underlying transport connection.  The primary operational
>       difference between the server and client is that the server is
>       generally authenticated, while the client is only optionally
>       authenticated.

]FIG]


[FIG(quote)[
[FIGCAPTION[
[2] [CITE@en[RFC 6125 - Representation and Verification of Domain-Based Application Service Identity within Internet Public Key Infrastructure Using X.509 (PKIX) Certificates in the Context of Transport Layer Security (TLS)]]
([TIME[2015-03-13 22:27:53 +09:00]] 版)
<https://tools.ietf.org/html/rfc6125#section-1.8>
]FIGCAPTION]

> TLS client:  An entity that assumes the role of a client in a
>       Transport Layer Security '''['''TLS''']''' negotiation.  In this specification
>       we generally assume that the TLS client is an (interactive or
>       automated) application client; however, in application protocols
>       that enable server-to-server communication, the TLS client could
>       be a peer application service.

]FIG]