05293424 is referenced by 231 patents and cites 8 patents.

A secure memory card includes a microprocessor on a single semiconductor chip and one or more non-volatile addressable memory chips. The microprocessor chip and non-volatile memory chips connect in common to an internal card bus for transmitting address, data and control information to such non-volatile memory chips. The microprocessor includes an addressable non-volatile memory for storing information including a number of key values, application specific configuration information and program instruction information. Each chip's memory is organized into a number of blocks or banks and each memory chip is constructed to include security control logic circuits. These circuits include a number of non-volatile and volatile memory devices which are loaded with key and configuration information under the control of the microprocessor only after the microprocessor has determined that the user has successfully performed a predetermined authentication procedure with a host computer. Thereafter, the user is allowed to read out information from blocks only as defined by the configuration information.

Title
Secure memory card
Application Number
7/960748
Publication Number
5293424
Application Date
October 14, 1992
Publication Date
March 8, 1994
Inventor
Peter J Wilson
Leander
TX, US
Thomas O Holtey
Newton
MA, US
Agent
John S Solakian
Faith F Driscoll
Assignee
Bull HN Information Systems
MA, US
IPC
H04L 9/00
G06K 5/00
H04K 1/00
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