AWS AppConfig is launching new encryption options for additional security considerations with feature flags and other types of configuration data. Using AWS Key Management Service’s customer managed keys (CMKs), customers can use keys that they themselves manage to encrypt/decrypt configuration data hosted by AWS AppConfig. AWS AppConfig helps engineers move faster and safer by decoupling feature releases from code deployments; with AWS AppConfig, you can change your software’s behavior on production without pushing out new code.
Source:: Amazon AWS