Computer terminal security system
Security system for data processing
Computer accessing system
Method and apparatus for providing security for computer software
Apparatus and method for preventing unauthorized use of computer programs
Digital processing system with self-test capability
Method for maintaining the integrity of a dual microprocessor multiprocessing computing system Patent #: 4558416
ApplicationNo. 07/065169 filed on 06/17/1987
US Classes:726/7, Usage713/187, COMPUTER PROGRAM MODIFICATION DETECTION BY CRYPTOGRAPHY714/812Specified digital signal or pulse count
ExaminersPrimary: Chan, Eddie P.
International ClassesG06F 11/08 (20060101)
G06F 21/00 (20060101)
AbstractA method of maintaining software program integrity and security in data processing systems through generation of a stored first selective electronic identification indicia that is uniquely characteristic of the total number of binary 1's and binary 0's of a software program in association with a stored plurality of selective third electronic indicia that individually identify authorized users of such program and generating a second electronic identifying indicia in response to a request by a prospective user for access to said program and releasing such requested program only when the first and second electronic identifying indicia are identical and when the requesting user's identification indicia corresponds with one of said third stored electronic indicia.