Device and a method for signing a video segment comprising one or more groups of pictures

A non-transitory computer readable storage medium having stored thereon computer executable instructions for signing a video segment comprising one or more groups of pictures, GOPs, each GOP comprising a header and one or more encoded frame, such that when the instructions are executed on a processor the processor is configured to:

• for each GOP of the one or more GOPs:
• producing a GOP hash;
• and
• digitally sign the GOP hash by means of a digital signature, thereby producing a signed GOP hash;
• for each GOP except a last GOP of the one or more GOPs:
• save the respective signed GOP hash in the header of a subsequent GOP;
• add an additional GOP to the video segment after the last GOP of the one or more GOPs, the additional GOP comprising a header and one or more encoded frames;
• and
• save the signed GOP hash of the last GOP of the one or more GOPs in the header of the additional GOP.

A device for signing a video segment comprising one or more groups of pictures, GOPs, each GOP comprising a header and one or more encoded frames, the device comprising circuitry configured to execute:

• a GOP hash producing function configured to produce a GOP hash for each GOP of the GOPs of the one or more GOPs;
• and
• a GOP hash signing function configured to digitally sign the GOP hash for each GOP of the GOPs of the one or more GOPs, thereby producing a respective signed GOP hash for each GOP of the GOPs of the one or more GOPs;
• a GOP adding function configured to add an additional GOP to the video segment after the last GOP of the one or more GOPs, the additional GOP comprising a header and one or more encoded frames;
• and
• a signed GOP hash saving function configured to, for each GOP of the one or more GOPs, save the respective signed GOP hash in the header of a subsequent GOP, wherein the signed GOP hash for the last GOP of the one or more GOPs is saved in the header of the additional GOP.