Methods and apparatus for the protection and control of computer programs
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 10, 1987
Grant Date -
N/A
app pub date -
Apr 30, 1982
filing date -
Apr 30, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Methods and apparatus for the protection and control of computer programs wherein a valid program is modified to provide a furnished program and a corresponding restoration program, one or both of these are modified in accordance with confirmation data, and the furnished program, confirmation data, and restoration program data are supplied to an equipped computer installation in the form of a furnished program medium, a confirmation unit, and a restoration unit, via separate commercial channels.
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