Concepts

SSL concepts includes supplemental information, providing some basic building blocks for the Secure Sockets Layer (SSL) protocols.

With the SSL protocol, you can establish secure connections between clients and server applications which provide authentication of one or both endpoints of the communication session. SSL also provides privacy and integrity of the data that client and server applications exchange.

• History of SSL
  Netscape developed The Secure Sockets Layer Protocol (SSL) in 1994, as a response to the growing concern over security on the Internet.
• How SSL works
  SSL is actually two protocols. The protocols are the record protocol and the handshake protocol. The record protocol controls the flow of the data between the two endpoints of an SSL session.
• Supported SSL and Transport Layer Security (TLS) protocols
  This topic describes which versions off the SSL and TLS protocols the i5/OS™ implementation supports.
• Server authentication
  With server authentication, the client will ensure that the server certificate is valid and that it is signed by a certificate authority (CA) which the client trusts.
• Client authentication
  Many applications allow the option to enable client authentication. With client authentication, the server will ensure that the client certificate is valid and that it is signed by a Certificate Authority which the server trusts.