Method for locking software files to a specific storage device

Details Method for locking software files to a specific storage device Method for locking software files to a specific storage device

1992-11-13

1994-07-05

Chan, Eddie P.

Cryptography

Key management

Having particular key generator

380 4, 395575, 364DIG1, 3642225, 3642866, G06F 1214, H04L 900

Patent

active

053275632

ABSTRACT:
The present invention provides a new and novel method for locking software programs to a particular disk. The method includes the steps of creating several files, one with a fixed name and at least one other file having a random name. Saving the head, cylinder and sector information for each of the files in the corresponding file along with use count information, saving the names of all the files in the first file with the fixed name, and encrypting all the files. This program locking method permits the distribution of trial copies of software programs and limits the risk that the program will be copied or used more than the permitted number of times.

REFERENCES:
patent: 4740890 (1988-04-01), William
patent: 4757533 (1988-07-01), Allen et al.
patent: 4796220 (1989-01-01), Wolfe
patent: 4903296 (1990-02-01), Chandra et al.
patent: 5027396 (1991-06-01), Platteter et al.

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