Method of implementing a secure program in a microprocessor card

Details Method of implementing a secure program in a microprocessor card Method of implementing a secure program in a microprocessor card

1997-01-16

1999-04-13

Le, Dieu-Minh T.

Excavating

39518305, 395186, 371 4011, G06F 1214

Patent

active

058945504

ABSTRACT:
A program is made secure relative to a CPU by storing in a first memory zone a series of predetermined-address functions that are directly executable by the CPU, by write protecting said first memory zone, and by storing the program in a second memory zone in the form of a series of instructions that are executable within the second memory zone or that activate functions contained in the first memory zone.

REFERENCES:
patent: 4184201 (1980-01-01), Melberg et al.
patent: 4875156 (1989-10-01), Tanagawa et al.
patent: 5452431 (1995-09-01), Bournas
patent: 5500949 (1996-03-01), Saito
patent: 5542081 (1996-07-01), Geronimi
patent: 5630057 (1997-05-01), Hait
patent: 5675645 (1997-10-01), Schwartz et al.

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