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Attestation Date: Defines the date on which the attestation task was initiated, and the point in time with respect to the attestation data that the user must attest to. Note that the reviewer does not attest to what the user has today. They attest to what the user had on the date specified in the attestation task.

Kritis Signer is an open source command-line tool that can create Binary Authorization attestations based on a policy that you configure. You can also use Kritis Signer to create attestations after checking an image for vulnerabilities identified by Artifact Analysis.

A single attestation can authorize identical images that are stored in multiple different locations or different registries, such as Artifact Registry, Container Registry, or an external container registry. At deploy time, Binary Authorization uses attestors to verify attestations.

Generally speaking, attestation is designed to prove a property of a system to a third party. In the case of confidential computing, this generally means a proof that the execution environment can be trusted before starting to execute code or before delivering any secret information.

Attestation is a confidential computing keystone. With attestation, workload owners can fully assert the trustworthiness of the hardware and software environment their workload is running in, regardless of the security posture of the underlying infrastructure provider.

Attestation is the act of witnessing the signing of a formal document and then also signing it to verify that it was properly signed by those bound by its contents. Attestation is a legal acknowledgment of the authenticity of a document and a verification that proper processes were followed.

The attestation process uses a series of measurements that are unique to an enclave. You can use these measurements to create access policies in external services to grant the enclave access to special cryptographic operations.