AWS EBS supports encryption of the volume. It also supports creating volumes from existingsnapshots provided the snapshots are created from encrypted volumes. The data at rest, the I/O aswell as all the snapshots of the encrypted EBS will also be encrypted. EBS encryption is based on theAES-256 cryptographic algorithm, which is the industry standard. http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/EBSEncryption.html