HumanCheck

HumanCheck is two-factor authentication for people. Pair with someone you trust using a shared secret. HumanCheck securely derives relationship material on each iPhone. You each choose a different HumanCode, confirm that both phones agree, and save the relationship locally. Later, when you need confidence that you are speaking with the same person, exchange your rotating six-digit HumanCodes. Each phone shows which code to say and which code to expect from the other person. PRIVATE BY DESIGN - No accounts - No phone number or email verification - No backend or cloud synchronization - No advertising, analytics, or tracking - No third-party dependencies - HumanCodes work completely offline after pairing SECURE LOCAL STORAGE Relationship keys are stored in the iPhone Keychain (an encrypted software database stored on your device's file system) and remain bound ONLY to that device. Your…