Boots – shoes – and leggings
Patent
1981-10-26
1986-06-03
Heckler, Thomas M.
Boots, shoes, and leggings
G06F 1214
Patent
active
045933537
ABSTRACT:
In a method of and apparatus for limiting program execution to only an authorized data processing system, a proprietary program, together with first and second authorization codes, is stored on a magnetic disc or other storage medium. The first and second authorization codes are read. A hardware module containing a pseudorandom number generator unique to the authorized system receives the first authorization code as a key. The resultant number generated by the number generator, which is a function of the key and particular pseudorandom generator algorithm, is compared with the second authorization code in direct or encrypted form. An execution enable signal is generated in response to a positive comparison to enable the stored program to be executed.
REFERENCES:
patent: 3609697 (1971-09-01), Blevins
patent: 3806882 (1974-04-01), Clarke
patent: 3996449 (1976-12-01), Attanasio et al.
patent: 4118789 (1978-10-01), Casto et al.
patent: 4120030 (1978-10-01), Johnstone
patent: 4168396 (1979-09-01), Best
patent: 4238854 (1980-12-01), Ehrsam et al.
patent: 4446519 (1984-05-01), Thomas
IBM Technical Disclosure Bulletin, "Internal Key Generation for Block Ciphers", vol. 23, No. 7B, Dec. 1980.
IBM Technical Disclosure Bulletin, "Data Encryption in a Digital Communication System", vol. 22, No. 2, Jul. 1979.
Heckler Thomas M.
Newman, Jr. David B.
Telecommunications Associates, Inc.
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