A method for proving and authenticating secure documents based on measurements of relative position changes of different processes involved in manufacture

摘要

A method for proving a secure document comprises the steps of: a) selecting a set of unique properties obtained as a result of a change in the manufacturing process and supplies, b) obtaining a digital image of the secure document, C) constructing a message by measuring a register of features selected from the secure document and the document ID data, d) constructing the hashed message, E) encrypting the hashed message by a private key using a public key cryptographic system to obtain a digital certificate; and e. G. And f) storing the digital certificate in an external database.