SSL and TLS Protocol Framework
TLS and its predecessor SSL are cryptographic protocols that provide secure transactions on the Internet for things such as e-mail, web browsing, instant messaging, and so on. SSL as a protocol was originally developed by Netscape. Most online transactions that are browser based are secured by SSL or TLS. Both of these protocols provide confidentiality, integrity, and authentication services. These protocols are considered to be operating at the session layer and higher in the OSI logical model. They both can use the public key infrastructure (PKI) and digital certificates for authentication of the VPN endpoints and for establishing encryption keys that may be used. Similar to IPsec, these protocols use symmetric ...
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