Microprocessor for providing copy protection

Details Microprocessor for providing copy protection Microprocessor for providing copy protection

1990-06-21

1991-07-23

Buczinski, Stephen C.

Cryptography

Cryptanalysis

364200, 364900, 380 25, H04L 900, H04K 100

Patent

active

050349805

ABSTRACT:
A microprocessor is encrypted with a unique code during its manufacture. When copy protection of software designed to operate with the microprocessor is desired, software is encrypted to function uniquely with that microprocessor. The software is ciphered such that only the unique cryptographic code in the microprocessor can decipher it. If the software or its copy is executed on another processor, the deciphering cannot occur. Two-pairs of CMOS transistors form each bit of the code integrated with the microprocessor.

REFERENCES:
patent: 4168396 (1979-09-01), Best
patent: 4278837 (1981-07-01), Best
patent: 4633388 (1986-12-01), Chiu
patent: 4757468 (1988-07-01), Domenik et al.

Affiliated with

Also associated with

Rating

Microprocessor for providing copy protection does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Microprocessor for providing copy protection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microprocessor for providing copy protection will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-438535