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Server Name Indication. 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 ...
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).
HTTP Public Key Pinning ( HPKP) is an obsolete Internet security mechanism delivered via an HTTP header which allows HTTPS websites to resist impersonation by attackers using misissued or otherwise fraudulent digital certificates. [1] A server uses it to deliver to the client (e.g. web browser) a set of hashes of public keys that must appear in ...
If you're ever concerned about the legitimacy of these emails, just check to see if there's a green "AOL Certified Mail" icon beside the sender name. When you open the email, you'll also see the Certified Mail banner above the message details. When you get a message that seems to be from AOL, but it doesn't have those 2 indicators, and it isn't ...
As of February 2019, 96.6% of web servers surveyed support some form of forward secrecy, and 52.1% will use forward secrecy with most browsers. As of July 2023, 99.6% of web servers surveyed support some form of forward secrecy, and 75.2% will use forward secrecy with most browsers. Certificate revocation
Secure Socket Tunneling Protocol ( SSTP) is a form of virtual private network (VPN) tunnel that provides a mechanism to transport PPP traffic through an SSL/TLS channel. SSL/TLS provides transport-level security with key negotiation, encryption and traffic integrity checking. The use of SSL/TLS over TCP port 443 (by default; port can be changed ...
S/MIME. S/MIME ( Secure/Multipurpose Internet Mail Extensions) is a standard for public-key encryption and signing of MIME data. S/MIME is on an IETF standards track and defined in a number of documents, most importantly RFC 8551. It was originally developed by RSA Data Security, and the original specification used the IETF MIME specification ...
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 ...