SEMICONDUCTOR MEMORY CARD AND DATA READING APPARATUS

摘要

A semiconductor memory card comprising a control IC (302), a flash memory (303), and a ROM (304). The ROM (304) holds information such as a medium ID (341) unique to the semiconductor memory card. The flash memory (303) includes an authentication memory (332) and a non-authentication memory (331). The authentication memory (332) can be accessed only by external devices which have been affirmatively authenticated. The non-authentication memory 331 can be accessed by external devices whether the external devices have been affirmatively authenticated or not. The control IC (302) includes control units (325) and (326), an authentication unit (321) and the like. The control units (325) and (326) control accesses to the authentication memory (332) and the non-authentication memory (331), respectively. The authentication unit (321) executes a mutual authentication with an external device.