Amazon S3 Encryption Client for AWS SDK for C++. This client is compatible with the Amazon S3 Encryption Client from the AWS Java SDK. If features AES 256 GCM, CBC, and CTR modes with AES Key Wrap. AWS SDK for C++ provides a modern C++ (version C++ 11 or later) interface for Amazon Web Services (AWS). It is meant to be performant and fully functioning with low- and high-level SDKs, while minimizing dependencies and providing platform portability (Windows, OSX, Linux, and mobile).