Digital authentication with digital and analog documents

This invention describes a system to verify if a digital document is authentic. It works by taking a digital document that has hidden authentication data inside it, along with a special code. The system uses this code to look up a second piece of authentication data from a database, which is derived from the document's content, and compares it to the hidden data to decide if the document is real or fake.

Why it matters: Filed before advanced AI could easily process and interpret semantic information from digital documents. The 'semantic information reader' and 'authentication information maker' described in the claims are now far more powerful and accessible with modern machine learning.

Status: ExpiredProtection ended and was never renewed
How hard to build: ModerateSoftware logic, database, embedding algorithms

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