Method for authenticating and verifying a security document based on measuring relative position variations in different processes involved in the creation of the security document

摘要

A method for authenticating a security document includes: a) selecting a set of unique features resulting from variations in the production process and supplies; and b) obtaining a digital image of the security document from different production processes. Obtaining data of the relative position (registration) between the selected features; c) measuring the registration of the selected features from the document and building the message from the document ID data And d) constructing a hash message, which is a message obtained after being encoded with a one-way cryptographic hash function, and e) encrypting the hash message with a private key using a public key encryption system. F) storing the digital certificate in an external database; Including. [Selection] Figure 1