scottyab/safetynethelper

Create exmaple server side implementation to improve safetynet strength

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#11 opened on Sep 22, 2015

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help wanted

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Description

Based on feedback from Google's security team, for the safetynet to be more secure way of checking device integrity the

  • generate the nonce on the server, and have the server implement anti-replay
  • Verification of nonce performed server side
  • Verification of JWS should also be performed on the server side because the crypto libraries on your device may have been owned and hence it can return verified even if it's not.

Contributor guide

Research direction
Implement server side nonce generation and verification to prevent replay attacks. Move JWS verification from device to server to ensure crypto integrity.
Tech stack
javaandroid
Domain
backend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
JavaAndroidSafetyNet APIServer side programming
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
35