[1] RFC 6797 - HTTP Strict Transport Security (HSTS) ( ( 版)) <http://tools.ietf.org/html/rfc6797#section-11.3>
[2] RFC 5280 - Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile ( 版) <http://tools.ietf.org/html/rfc5280#section-3.2>
Self-
signed certificates are self-issued certificates where the digital
signature may be verified by the public key bound into the
certificate. Self-signed certificates are used to convey a public
key for use to begin certification paths.