Patent attributes
Methods, systems, and apparatus, including an apparatus for verifying the integrity of requests. In some aspects, a method includes receiving, from an application, a request including an attestation token of the application. The attestation token includes a set of data that includes at least a public key of the application and a token creation time that indicates a time at which the attestation token was created. The attestation also includes a signature of the set of data. The signature is generated using a private key that corresponds to the public key. The integrity of the request is verified using the attestation token. The verification includes determining that the integrity of the request is valid based on a determination that the token creation time is within a threshold duration of the time at which the request was received and a determination that the set of data has not been.