ANNOUNCING AWS KMS ECDH SUPPORT

Summary from the TLDR InfoSec newsletter

AWS has announced support in KMS for asymmetric keys using ECDH. Each party generates a key using the same key spec and selects KEY_AGGREEMENT for the usage. The parties then retrieve and exchange their public key from KMS. Each party can then utilize the other party's public key and their KEY_AGREEMENT key to call the new DeriveSharedSecret API to derive an asymmetric key that can be utilized for secure communication. This post provides a walkthrough for a sample use case of end-to-end encryption using the new DeriveSharedSecret API.