Cryptography – Key management – Having particular key generator
Patent
1993-03-05
1995-11-21
Rudolph, Rebecca L.
Cryptography
Key management
Having particular key generator
380 4, G06F 1214, H04L 900
Patent
active
054695570
ABSTRACT:
A semiconductor microcontroller device is adapted to control the operation of an external system. The device includes a CPU, program memory for storing instructions to be executed by the CPU to perform its control functions, and data memory for storing data for selective retrieval by the CPU. The contents of either memory are code protected by an EEPROM fuse, and are automatically erased if the code protect state of the EEPROM fuse is sought to be reset, and the EEPROM fuse is reset only after the erasure of the memory contents.
REFERENCES:
patent: 4590552 (1986-05-01), Guttag et al.
patent: 4890263 (1989-12-01), Little
patent: 5357572 (1994-10-01), Bianco et al.
Drake Rodney
Salt Tom
Microchip Technology Incorporated
Rudolph Rebecca L.
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