Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1992-10-14
1994-03-08
Buczinski, Stephen C.
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
235380, 235382, 380 24, H04K 100, G06K 500, H04L 900
Patent
active
052934241
ABSTRACT:
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.
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Holtey Thomas O.
Wilson Peter J.
Buczinski Stephen C.
Bull HN Information Systems Inc.
Driscoll Faith F.
Solakian John S.
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