Amazon RDS for Oracle now supports sqlnet.ora client parameters for the Oracle Native Network Encryption (NNE)option

Amazon Relational Database Service (Amazon RDS) for Oracle now supports four new customer modifiable sqlnet.ora client parameters for the Oracle Native Network Encryption (NNE) option. Amazon RDS for Oracle already supports server parameters which define encryption properties for incoming sessions. These client parameters apply to outgoing connections such as those used by database links.

Source:: Amazon AWS