![]() ![]() Whenever possible, use key policies to give users permission to call theĭecrypt operation on a particular KMS key, instead of using &IAM policies. This practice ensures that you use the KMS key that If the ciphertext was encrypted under a different KMS key, When you use the KeyId parameter to specify a KMS key, AWS KMS However, specifying the KMS key is always recommended asĪ best practice. ![]() ![]() This feature adds durability to your implementationīy ensuring that authorized users can decrypt ciphertext decades after it was encrypted, even It adds to the symmetric ciphertext blob. AWS KMS can get this information from metadata that If the ciphertext was encrypted under a symmetric encryption KMS key, the These libraries return a ciphertext format that is incompatible with AWS KMS. However, it cannot decrypt symmetricĬiphertext produced by other libraries, such as the AWS Encryption SDK or Amazon S3 client-side encryption. The Decrypt operation also decrypts ciphertext that was encrypted outside ofĪWS KMS by the public key in an AWS KMS asymmetric KMS key. Must specify the KMS key and the encryption algorithm that was used to encrypt the ciphertext.įor information about asymmetric KMS keys, see Asymmetric KMS keys in theĪWS Key Management Service Developer Guide. You can use this operation to decrypt ciphertext that was encrypted under a symmetricĮncryption KMS key or an asymmetric encryption KMS key. ![]()
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