Ballpoint Provenance

Proof of person. Ballpoint Provenance signs what you make on your phone, including writing, photos, videos, voice notes and files, with a key that is created inside your phone's secure hardware and never leaves it. Each signature can be verified independently: that a person was present, that it happened live, on this device, and that the content is intact since it was signed. What you can do • Write - type in the app and sign the text. By default only a fingerprint of the text (a hash) leaves your phone, not your words. • Camera - take a photo or record a video that is hashed and signed as it is captured. Cut a clip from a video later and the clip still checks against the original. • Voice - record a voice note and sign it the same way. • Sign a file - sign any file you already have. • Verify - check a photo, recording, clip, file or piece of text against its record. • Approve - when…