9 The Oracle Wire Protocol Driver : SSL and Oracle

SSL and Oracle
To enable support for SSL connections to Oracle, the Oracle database must be configured with the Oracle Advanced Security bundle. This is an option available from Oracle as an add-on to Oracle Enterprise Edition Servers.
The following link explains the supported configurations and how to configure Oracle Enterprise servers for SSL:
http://download.oracle.com/docs/cd/B28359_01/network.111/b28530/asossl.htm#i1013323
SSL negotiates the terms of the encryption in a sequence of events known as the SSL handshake. See “Using Security” for more information about SSL data encryption.