Amazon RDS now supports Secure Sockets Layer (SSL) and Oracle Native Network Encryption (NNE) in all Amazon RDS for Oracle editions

You can now use Secure Sockets Layer (SSL) and Native Network Encryption (NNE) to establish a secure network connection to all editions of Amazon RDS for Oracle. Starting with Oracle database version 11gR2, these features are no longer part of the Oracle Advanced Security option and are available in all Oracle editions supported by Amazon RDS.

from What's New from Amazon Web Services http://ift.tt/1O1XIWv