The encryption algorithm that will be used to decrypt the ciphertext. This parameter is required only when the ciphertext was encrypted under an asymmetric KMS key. Valid Values: SYMMETRIC_DEFAULT | RSAES_OAEP_SHA_1 | RSAES_OAEP_SHA_256 | SM2PKE
Specifies the KMS key that AWS KMS uses to decrypt the ciphertext. This parameter is required only when the ciphertext was encrypted under an asymmetric KMS key.