blu-ray disc plus (DRM) (BD+)
BD+(BD plus) is a copy protection and digital rights management( DRM) of Blu-Ray discs. According to the procedure, a virtual machine( VM) is stored on the Blu-Ray discs, which is started by authorized BD players.
The virtual machine (VM) controls all functions with which the Blu-Ray disc is accessed. This includes unauthorized reading, changing the firmware, playing movies in unauthorized periods or after the expiration date, and also any manipulation of the BD player is controlled by this virtual machine. The user decides for himself which of these functions he wants to use.