Subject Alternative Name

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An example of a Subject Alternative Name section for domain names owned by the Wikimedia Foundation

Subject Alternative Name (SAN) is an extension to X.509 that allows various values to be associated with a security certificate using a subjectAltName field.[1] These values are called Subject Alternative Names (SANs). Names include:[2]

See also[edit]


  1. ^ "x509v3_config - X509 V3 certificate extension configuration format". OpenSSL. Retrieved 2020-01-16.
  2. ^ RFC 5280: Subject Alternative Name