Method and apparatus for verifying the identity of dynamic memor

Details Method and apparatus for verifying the identity of dynamic memor Method and apparatus for verifying the identity of dynamic memor

1986-05-05

1988-06-14

Atkinson, Charles E.

Boots, shoes, and leggings

371 25, G01R 3128

Patent

active

047516674

ABSTRACT:
The refresh cycle for a bank of dynamic memory is inhibited until a predetermined proportion of the data has corrupted. The pattern of cells in which data has corrupted is characteristic of the individual device and is used to determine whether the individual machine is authorized to run protected software.

REFERENCES:
patent: 4245308 (1981-01-01), Hirschman et al.
patent: 4337659 (1982-07-01), Ragle
patent: 4380070 (1983-04-01), Steiner
patent: 4462076 (1984-07-01), Smith, III
patent: 4486828 (1984-12-01), Kitamura et al.
patent: 4622652 (1986-11-01), Zumchak et al.

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