MEMORY CHIP

摘要

Disclosed is a semiconductor memory chip (100) that, in order to prevent illicit use of data, via forgery or the like, is provided with: a memory (110) that contains a special region, said special region being a memory region for predetermined data; and a data conversion unit (140). The data conversion unit includes: a key memory unit that stores a second key corresponding to a first key that an external device uses to convert data; a conversion unit that receives write data to be written to the special region, from a controller (200), and uses the second key to convert the write data and generate converted data; and a write unit that writes the converted data to the special region.