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Android Key Attestation Library

This library uses the Bouncy Castle ASN.1 parser to extract information from an Android attestation data structure to verify that a key pair has been generated in a hardware-protected environment of an Android device. It is maintained in tandem with Android's key attestation capabilities and is meant for production use.

This repository contains a server sample code that shows how to validate an Android attestation certificate chain outside the Android framework. This is the recommended best practice, since if the Android device is rooted or otherwise compromised, on-device validation of the attestation may be inaccurate.

The entry point into the library itself is com.google.android.attestation.ParsedAttestationRecord.createParsedAttestationRecord.

For more details, see the documentation and the guide at https://developer.android.com/training/articles/security-key-attestation.html .

Getting Started

See the server sample for details.


If you've found an error in this sample, please file an issue: https://github.com/google/android-key-attestation

Patches are encouraged, and may be submitted by forking this project and submitting a pull request through GitHub. Please see CONTRIBUTING.md for more details.


Copyright 2016, The Android Open Source Project, Inc.

Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at


Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.