HiSign - The New Hello

HiSign replaces "hello" with cryptographic proof of who is on the other end of the line. AI-generated voices have made it trivial for scammers to sound exactly like your bank, your boss, your family. The familiar voice is no longer evidence. HiSign gives you something a faked voice cannot reproduce: a fresh two-word phrase, generated live on both phones, that only you and the other person can see. You can forget the family safe-word. HiSign generates a new phrase every 60 seconds for every contact, automatically. Open the app, read what is on the screen, listen for the matching reply. That is the whole verification. Nothing to remember. Nothing to guess. HOW IT WORKS: 1. Create your encrypted identity card on your phone. 2. Exchange cards with a contact face-to-face - by QR code, NFC tap, or encrypted manual share. 3. On any call, open HiSign and read the phrase next to that contact's name. 4. Your contact reads theirs back. If both phrases match what each of you sees, you know it is really them. 5. The phrases roll over automatically every minute, so a clone that overhears one is already too late to use it. SECURITY BUILT IN: • Encryption protects every contact, profile, and backup on your device. • Face ID, Touch ID, or your device passcode required to unlock. • Phrases rotate every 60 seconds using time-based cryptography. • Per-contact identity keys - each relationship has its own proof. • Encrypted, password-protected backups you can carry to a new phone. PRIVACY FIRST: • No HiSign backend. No accounts. No cloud sync. No tracking. • Zero data collection - we never see your contacts, your phrases, or your calls. • No analytics, no telemetry, no advertising IDs. • Everything stays encrypted on your device. Contact exchange is peer-to-peer, in person.