Patent ID: 7869594

Claim:
A digital broadcasting receiving system, comprising: an information processing device for executing a program file including a loader, a main process that is at least partially encrypted, and a supervisory process that is at least partially encrypted and for supervising main processing according to the main process; and a digital broadcasting receiving device detachably connected to the information processing device and for receiving a broadcast signal of digital broadcasting; wherein the information processing device includes storage section on which the loader is developed in a executable condition, and transmits the main process that is at least partially encrypted and the supervisory process that is at least partially encrypted to the digital broadcasting receiving device, wherein said the digital broadcasting receiving device includes: a receiver for receiving the broadcast signal of the digital broadcasting to generate content data, a decryption key storage section for storing a decryption key, a process decryption section for decrypting the main process and the supervisory process received from the information processing device using the decryption key stored in the decryption key storage section, a protective data adding section for adding protective data to the main process decrypted by the process decryption section, and a first protective data storage section for storing the protective data, the information processing device, in accordance with the loader, receives the decrypted main process and the decrypted supervisory process from the digital broadcasting receiving device, and develops the decrypted main process and the decrypted supervisory process on the storage section included in the information processing device.