IC memory card with security check

摘要

An IC memory card for use with a host information processing has an interface with the host information processor, a common memory having one or more IC memories and a security circuit for prohibiting access to the common memory if address data input from the host processor does not coincide with preset data. The IC memory card may further provide with an attribute memory which stores a security data and attribute information about the IC card wherein the security circuit checks not only the address data but also the data read out from the attribute memory to enhance the security.