METHOD FOR ENSURING THE ROBUSTNESS OF A DIGITAL WATERMARK EMBEDDED IN A STATIC IMAGE TRASMITTED OVER A NOISY COMMUNICATION CHANEL Russian patent published in 2022 - IPC H04L9/00 G06F11/08 

FIELD: communications.

SUBSTANCE: in the method identifying information is generated by concatenation of the source identifier, service information and signature of the image represented by the hash function from this image, the source identifier and service information, the generalized identifier is over-encoded and then expanded using Barker sequence, the resulting sequence is encrypted with a key, the sequence is keyed into an empty container and the filled container is transferred to the recipient, on the receiving side, using the key, the digital video is extracted from the filled container, the received code word is decrypted with the key, divided into blocks and the scalar product of each block and the direct Barker sequence is calculated; if the product is greater than 0, it is concluded that the transfer is 1, if it is less than 0, it is concluded that the transfer is 0, checking for errors in the received code sequence is carried out based on syndrome, if there are no errors, the resulting sequence is decoded with redundant code, the received source identifier and image signature are compared with the corresponding values. If the received source ID matches the original source ID, if the received image ID is the same as calculated from received container, a conclusion is made about the authenticity of the received static image and the source.

EFFECT: higher level of protection of information embedded in static images from interference when transmitting an image over a communication channel with interference.

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