Azure Attestation - Attestation Services

Overview

Store and process confidential data with confidence

Verify the identity and security posture of a platform before you interact with it. Azure Attestation receives evidence from the platform, validates it with security standards, evaluates it against configurable policies, and produces an attestation token for claims-based applications. The service supports attestation of trusted platform modules (TPMs) and trusted execution environments (TEEs) like Intel® Software Guard Extensions (SGX) and virtualization-based security (VBS) enclaves.

Tap into disruptive business models that require highly scalable compute resources and uncompromising trust with the remote attestation capability. Azure Attestation provides comprehensive attestation services for multiple environments and distinctive use cases such as enclave validation, secure key sharing, and confidential multiparty computation.
Easily access a default provider in your Azure region for attestation services without the need for configuration. Default providers are available for all Azure Active Directory (Azure AD) users.

Learn more about default providers
Create your own attestation provider and configure custom policies to restrict attestation token generation. Azure Attestation evaluates the platform evidence against your policies to ensure that the binaries running inside the platform haven’t been tampered with by external entities. If your attestation provider allows signed policies, Azure Attestation will use your signer certificates to validate the signed policies and authenticate the users.

Learn more about attestation policies

Features

Unified attestation across trusted compute platforms

Pricing

Azure Attestation is free

Azure Attestation services are available at no additional cost. Microsoft Azure Attestation is a free service which offers attestation of multiple TEEs in Azure.

Resources

Azure Attestation resources and documentation

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A public key generated within an enclave can be expressed in the enclave held data (EHD) property of the attestation request object sent to Azure Attestation. Azure Attestation includes EHD as a claim in the attestation token. A relying party can use the EHD from the verified attestation response to encrypt the secrets and share with the enclave. See Azure Attestation concepts for more information.
Attestation token generated by the Azure Attestation is signed using a self-signed certificate. The signing certificates are exposed via an OpenID metadata endpoint. Relying party can retrieve the certificates from this endpoint and perform signature verification of the attestation token.