Windows validating on unsecure wireless network
TLS is a proposed Internet Engineering Task Force (IETF) standard, first defined in 1999 and updated in RFC 5246 (August 2008) and RFC 6176 (March 2011).It builds on the earlier SSL specifications (1994, 1995, 1996) developed by Netscape Communications Client-server applications use the TLS protocol to communicate across a network in a way designed to prevent eavesdropping and tampering.Websites are able to use TLS to secure all communications between their servers and web browsers.
Once the client and server have agreed to use TLS, they negotiate a stateful connection by using a handshaking procedure.
According to Netcraft, who monitors active TLS certificates, the market-leading CA has been Symantec since the beginning of their survey (or Veri Sign before the authentication services business unit was purchased by Symantec).
Symantec currently accounts for just under a third of all certificates and 44% of the valid certificates used by the 1 million busiest websites, as counted by Netcraft.
In addition to the properties above, careful configuration of TLS can provide additional privacy-related properties such as forward secrecy, ensuring that any future disclosure of encryption keys cannot be used to decrypt any TLS communications recorded in the past.
TLS supports many different methods for exchanging keys, encrypting data, and authenticating message integrity (see § Algorithm below).TLS typically relies on a set of trusted third-party certificate authorities to establish the authenticity of certificates.