AWS RDS database encryption

There a couple of ways to encrypt you data at rest when using AWS RDS:

1. Oracle RDS TDE support : http://aws.amazon.com/about-aws/whats-new/2013/04/18/amazon-rds-oracle-encryption
2. Oracle RDS with Ciphercloud : http://www.ciphercloud.com/database-encryption-and-tokenization.aspx.  AWS specific here (and mentions HIPPA) : http://www.ciphercloud.com/aws-encryption-ciphercloud.aspx

Oracle TDE also supports encryption at the network tier.