Hardcopy Document Authentication Based on Public Key Encryption and 2D Barcodes

In document authentication, the context refers to the ability to trace the origins of a document to a given person, the device that produced it, or the time and/or place it was produced. Forgeries pose significant dangers in terms of authentication and trust. Therefore, it is essential to maintain the integrity of important documents to prevent document content modification by an intruder. Here, we explain the possibility of adding a two-dimensional (2D)barcode that contains the required information to ensure integrity verification, the original authentication, and the confidentiality of documents in the hardcopy formats. We utilize some cryptographic algorithms such as RSA, the ElGamal Cryptosystem, and the Chinese Remainder Theorem, in achieving the required security attributes. We then verify safe and secure document transfer.