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**To verify a digital signature** The following ``verify`` command verifies a cryptographic signature for a short, Base64-encoded message. The key ID, message, message type, and signing algorithm must be same ones that were used to sign the message. In AWS CLI v2, the value of the ``message`` parameter must be Base64-encoded. Or, you can save the message in a file and use the ``fileb://`` prefix, which tells the AWS CLI to read binary data from the file. The signature that you specify cannot be base64-encoded. For help decoding the signature that the ``sign`` command returns, see the ``sign`` command examples. The output of the command includes a Boolean ``SignatureValid`` field that indicates that the signature was verified. If the signature validation fails, the ``verify`` command fails, too. Before running this command, replace the example key ID with a valid key ID from your AWS account. :: aws kms verify \ --key-id 1234abcd-12ab-34cd-56ef-1234567890ab \ --message fileb://EncodedMessage \ --message-type RAW \ --signing-algorithm RSASSA_PKCS1_V1_5_SHA_256 \ --signature fileb://ExampleSignature Output:: { "KeyId": "arn:aws:kms:us-west-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab", "SignatureValid": true, "SigningAlgorithm": "RSASSA_PKCS1_V1_5_SHA_256" } For more information about using asymmetric KMS keys in AWS KMS, see `Using asymmetric keys <https://docs.aws.amazon.com/kms/latest/developerguide/symmetric-asymmetric.html>`__ in the *AWS Key Management Service Developer Guide*.