Secure Sockets Layer <networking, security> (SSL) A {protocol} designed by {Netscape Communications Corporation} to provide secure communications over the {Internet} using {asymmetric key encryption}. SSL is layered beneath application {protocols} such as {HTTP}, {SMTP}, {Telnet}, {FTP}, {Gopher} and {NNTP} and is layered above the connection protocol {TCP/IP}. It is used by the {HTTPS} {access method}. (2007-05-25)