Semiconductor device

摘要

A semiconductor device in related art has a problem that security on confidential information stored is insufficient. A semiconductor device of the present invention has a unique code which is unique to a device and generates unique code corresponding information from the unique code. The semiconductor device has a memory region in which specific information obtained by encrypting confidential information is stored in a region associated with the unique code corresponding information. The specific information read from the memory region is encrypted with the unique code corresponding information to generate the confidential information.

主权项

1. A semiconductor device comprising:
a unique code generating unit comprising a static random access memory and which generates a unique code using an initial value at a time of start of the static random access memory, the unique code being unique to a device; a unique code corresponding information generating unit which generates unique code corresponding information from the unique code; a memory region comprising a plurality of storing regions each of which is assigned to a predetermined address, wherein specific information obtained by encrypting confidential information with the unique code is stored in one of said storing regions whose assigned address is indicated by the unique code corresponding information, and wherein dummy data is stored in others of said plurality of storing regions; and a decrypting unit which decrypts, with the unique code, the specific information which is read from said one storing region by using the unique code corresponding information to generate the confidential information.