Systems for encoding, decoding and validing the integrity of a security document with a steeganography encoded image and methods, security document, computer devices, computer programs and associated reading media

The invention comprises an encoding system for a security document with a printer-proof steganography-encoded image and a decoding and integrity validation system for a security document with a printer-proof steganography-encoded image, wherein the said systems operate based on a generator generative adversarial neural network and a discriminative generative adversarial neural network.The invention comprises an encoding method, a decoding method, security documents, computing devices, computer programs and reading means (scanner) by an associated computing device.The invention applies to image encoding in general, and is particularly useful for concealing a secret message in facial images, also called portraits, in the context of security documents with a printer-proof steganography-encoded image-such as civil identification documents and personal machine-readable documents.