RECEIVING DEVICE FOR PROTECTIVE PRESERVATION OF A UNIT OF CONTENT AND REPRODUCTION DEVICE Russian patent published in 2006 - IPC H04N7/167 G06F1/00 H04L9/00 

FIELD: engineering of systems for loading and reproducing protective unit of content.

SUBSTANCE: in accordance to invention, in receiving device 110 for protected preservation of unit 102 of content on carrier 111 of information unit 102 of content is stored in protected format and has associated license file, file 141 of license being encrypted with usage of open key, associated with a group of reproduction devices 120,121, and, thus, each reproduction device 121 in group can decrypt file 141 of license and reproduce unit 102 of content, and devices not belonging to group can not do that, while device 121 for reproduction may provide the open key, specific for given device, to system for controlling content distribution, and then system for controlling content distribution returns secret key for group, encrypted with open key of device 121 for reproduction, after that device 121 of reproduction by protected method receives secret key of group and may decrypt file 141 of license.

EFFECT: creation of system for loading and reproducing protected unit of content, making it possible to constantly control usage of unit of content.

3 cl, 4 dwg