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List of HTTP status codes - Wikipedia List of HTTP status codes Hypertext Transfer Protocol (HTTP) response status codes are issued by a server in response to a client's request made to the server It includes codes from IETF Request for Comments (RFCs), other specifications, and some additional codes used in some common applications of the HTTP
HTTPS - Wikipedia Hypertext Transfer Protocol Secure (HTTPS) is an extension of the Hypertext Transfer Protocol (HTTP) It uses encryption for secure communication over a computer network, and is widely used on the Internet 12 In HTTPS, the communication protocol is encrypted using Transport Layer Security (TLS) or, formerly, Secure Sockets Layer (SSL)
Transport Layer Security - Wikipedia Transport Layer Security Transport Layer Security (TLS) is a cryptographic protocol designed to provide communications security over a computer network, such as the Internet 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
HTTP 1. 1 Upgrade header - Wikipedia The Upgrade header field is an HTTP header field introduced in HTTP 1 1 In the exchange, the client begins by making a cleartext request, which is later upgraded to a newer HTTP protocol version or switched to a different protocol A connection upgrade must be requested by the client; if the server wants to enforce an upgrade it may send a 426 Upgrade Required response The client can then
Version history for TLS SSL support in web browsers Version history for TLS SSL support in web browsers Version history for TLS SSL support in web browsers tracks the implementation of Transport Layer Security protocol versions in major web browsers
HTTP Strict Transport Security - Wikipedia It allows web servers to declare that web browsers (or other complying user agents) should automatically interact with it using only HTTPS connections, which provide Transport Layer Security (TLS SSL), unlike the insecure HTTP used alone HSTS is an IETF standards track protocol and is specified in RFC 6797
Online Certificate Status Protocol - Wikipedia The Online Certificate Status Protocol (OCSP) is an Internet protocol used for obtaining the revocation status of an X 509 digital certificate [4] It was created as an alternative to certificate revocation lists (CRL), specifically addressing certain problems associated with using CRLs in a public key infrastructure (PKI) [5] Messages communicated via OCSP are encoded in ASN 1 and are
Heartbleed - Wikipedia Heartbleed is a security bug in some outdated versions of the OpenSSL cryptography library, which is a widely used implementation of the Transport Layer Security (TLS) protocol It was introduced into the software in 2012 and publicly disclosed in April 2014 Heartbleed could be exploited regardless of whether the vulnerable OpenSSL instance is running as a TLS server or client It resulted