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RFC 8954: OCSP Nonce Extension. The Online Certificate Status Protocol ( OCSP) is an Internet protocol used for obtaining the revocation status of an X.509 digital certificate. [2] It is described in RFC 6960 and is on the Internet standards track. It was created as an alternative to certificate revocation lists (CRL), specifically addressing ...
Server Name Indication ( SNI) is an extension to the Transport Layer Security (TLS) computer networking protocol by which a client indicates which hostname it is attempting to connect to at the start of the handshaking process. [1] The extension allows a server to present one of multiple possible certificates on the same IP address and TCP port ...
When the site's visitors attempt to connect to the site, this response is included ("stapled") with the TLS/SSL handshake via the Certificate Status Request extension response (note: the TLS client must explicitly include a Certificate Status Request extension in its ClientHello TLS/SSL handshake message).
Transport Layer Security ( TLS) is a cryptographic protocol designed to provide communications security over a computer network. The protocol is widely used in applications such as email, instant messaging, and voice over IP, but its use in securing HTTPS remains the most publicly visible. The TLS protocol aims primarily to provide security ...
Subject Alternative Name. 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).
A number of commercial certificate authorities exist, offering paid-for SSL/TLS certificates of a number of types, including Extended Validation Certificates. Let's Encrypt, launched in April 2016, provides free and automated service that delivers basic SSL/TLS certificates to websites.
The Domain Name System Security Extensions ( DNSSEC) are a suite of extension specifications by the Internet Engineering Task Force (IETF) for securing data exchanged in the Domain Name System ( DNS) in Internet Protocol ( IP) networks. The protocol provides cryptographic authentication of data, authenticated denial of existence, and data ...
Opportunistic TLS. Opportunistic TLS (Transport Layer Security) refers to extensions in plain text communication protocols, which offer a way to upgrade a plain text connection to an encrypted ( TLS or SSL) connection instead of using a separate port for encrypted communication. Several protocols use a command named " STARTTLS " for this purpose.