The Proof Engine allows apps and institutions to verify facts about a person without ever accessing their underlying data.

Examples:

• “Is this user over 18?”
• “Does this user live in Portugal?”
• “Does this certificate belong to them?”
• “Does the ID exist and is valid?”
• "Is this person the owner of this document?"
• “Is the state_commitment valid?”

All verification happens without revealing:

• name
• birthday
• address
• document IDs
• certificate numbers
• attributes
• raw identity data

This is the core of LIVRE OS:

verification without exposure.