Computer systems to inhibit unauthorized copying, unauthorized u

Details Computer systems to inhibit unauthorized copying, unauthorized u Computer systems to inhibit unauthorized copying, unauthorized u

1982-09-20

1985-12-10

Cangialosi, Salvatore

Telegraphy

Systems

Printing

178 2209, 364900, H04K 900

Patent

active

045581762

ABSTRACT:
A method and apparatus are provided for inhibiting unauthorized copying, unauthorized usage and automated cracking of proprietary software used in computer systems. The computer systems execute protected programs, which are protected by encapsulation and/or encryption. To provide security against unauthorized copying of software, means are provided that detect and inhibit automated cracking of protected programs. These means will destroy or make inaccessible information in the CPU during conditions when automated cracking could occur. These means will also store interrupt contexts in secret to prevent implementation of automated cracking. Additional features may be provided to allow operation as a general purpose computer system, where protected programs are distributed using public key cryptography and a means is provided to convert from this distribution form to the protected execution form.

REFERENCES:
patent: 3958081 (1976-06-01), Ehrsam et al.
patent: 3996449 (1976-12-01), Attanasio et al.
patent: 4087856 (1978-05-01), Attanasio
patent: 4120030 (1978-10-01), Johnstone
patent: 4168396 (1979-09-01), Best
patent: 4183085 (1980-01-01), Roberts et al.
patent: 4193131 (1980-03-01), Lennon et al.
patent: 4200770 (1980-04-01), Hellman et al.
patent: 4238854 (1980-12-01), Ehrsam et al.
patent: 4246638 (1981-01-01), Thomas
patent: 4278837 (1981-07-01), Best
patent: 4306289 (1981-12-01), Lumley
patent: 4319079 (1982-03-01), Best
patent: 4446519 (1984-05-01), Thomas
patent: 4454594 (1984-06-01), Heffron et al.
patent: 4458315 (1984-07-01), Uchenick
patent: 4471163 (1984-09-01), Donald et al.
Diffie et al., "Privacy & Authentication: An Introduction to Cryptography", IEEE Trans. Inform. Theory, Mar. 1979, pp. 397-427.
Kunheim, Alan, Cryptograph: A Primer, 1981, pp. 6-8, 285, 286, 294, 334, 335.

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