SafetyNet Playground consists of an Android application and an associated web service that can be used as a sample for developers attempting to securely implement Google's SafetyNet attestation API.

Google's SafetyNet service can help your app maintain a level of assurance that the device you are executing on has not been tampered with. There are many ways to design how you'll do attestation requests, such as using a client-only or client-server architecture. SafetyNet Playground demonstrates a tamper-resistant client-server attestation flow.

This sample app will attempt to make a REST request to a web service. This request will be successful only if the SafetyNet service attests that your device is CTS compatible.

You can read more on SafetyNet Playground at https://www.cigital.com/blog/using-safetynet-api

You can read a technical analysis of SafetyNet internals at https://koz.io/inside-safetynet

This application and associated web service are released as open source code
Android application: https://github.com/cigital/safetynet-app
Web Service: https://github.com/cigital/safetynet-web-php

Credits:

SafetyNet research: John Kozyrakis, Technical Strategist @Cigital
SafetyNet Playground app and web service development: Georgi Boiko, Security Consultant @Cigital

Step 1. Download SafetyNet Playground Mod () APK file on HappyMod.com.
Step 2. Once it's downloaded, open Downloads, tap on the APK file, and tap Yes when prompted.
Step 3.SafetyNet Playground Mod () APK will begin installing on your device. Simple.

Step 1. Download HappyMod APK file on HappyMod.com.
Step 2. Once it's downloaded, open Downloads, tap on the APK file, and tap Yes when prompted.
Step 3.Search SafetyNet Playground Mod, click Download.
Step 4: You can download 100% working mods on HappyMod with one click.