What is the difference between SSL/TLS and SSL and TLS ?
Transport Layer Security (TLS) and its predecessor, Secure Sockets Layer (SSL), are cryptographic protocols for encrypting data transfers over networks. There are slight differences between TLS and SSL, but they are substantially the same. (SSL version 1 and version 2 should no longer be used. Most software will automatically negotiate between SSL version 3 and TLS version 1.) Most people are only familiar with the older SSL term. The term SSL/TLS usually means SSL or TLS, especially when the difference is not important. Sometimes people use the term SSL generically, to mean SSL or TLS.