Method to prevent use of incorrect program version in a computer

Details Method to prevent use of incorrect program version in a computer Method to prevent use of incorrect program version in a computer

1987-06-26

1990-05-29

Williams, Jr., Archie E.

Boots, shoes, and leggings

3642225, 3642466, 3642467, 3642468, 3642327, 350 23, 350 25, G06F 1300, G06F 1100, G06F 1214, H04L 900

Patent

active

049300733

ABSTRACT:
A method prevents an incorrect program version from being executed by a computer system. More specifically, a synchronization key is contained in a load module and is used to encrypt that load module which also contains a protected program. The encrypted load module with the protected program and synchronization key therein is stored in auxiliary storage. The synchronization key and program name are then placed in a table in a secure memory. When the program is requested for execution, the synchronization key in the protected table corresponding to the program name is used to decrypt the load module. The synchronization key in the load module is then extracted and compared with the synchronization key which is stored in a protected table and associated with the protected program. If the two synchronization keys are the same, then the decrypted protected program is loaded into the main memory for execution.

REFERENCES:
patent: 4038645 (1977-07-01), Birney et al.
patent: 4366537 (1982-12-01), Heller et al.
patent: 4375579 (1983-03-01), Davida et al.
patent: 4588991 (1986-05-01), Atalla
patent: 4652990 (1987-03-01), Pailen et al.
patent: 4757534 (1988-07-01), Matyas et al.

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