| 摘要 |
A secure memory card includes a microprocessor on a single semiconductor chip which interconnects through an internal bus to a number of non-volatile addressable memory chips (103a, 103b, ...103n). The microprocessor includes an addressable non-volatile memory for storing a number of key values. Each chip's memory (54) is organized into a number of blocks, each block including a number of rows of byte locations. Each row includes a lock bit location, the total number of which provide storage for a lock value. Each memory chip (103a, 103b, ...103n) is constructed to include security control logic circuits (30) arranged to perform a predetermined key validation operation by comparing key values against the bit contents of lock bit locations during an authentication procedure with a host computer.
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