Apparatus and method for preventing computer access by unauthori

Details Apparatus and method for preventing computer access by unauthori Apparatus and method for preventing computer access by unauthori

1987-08-07

1989-08-15

Chan, Eddie P.

Boots, shoes, and leggings

3642565, 3642864, G06F 1210, G06F 1212, G06F 1214

Patent

active

048581178

ABSTRACT:
The apparatus provides a secure input/output command system by the operating system generating a virtual input/output command including a virtual channel number, verifying that the user has authorization to access the processes and the device, and then generating a physical input/output command for transfer over a system bus to the device addressed by the physical channel number included in the command.

REFERENCES:
patent: 3787813 (1974-01-01), Cole et al.
patent: 4084227 (1978-04-01), Bennett et al.
patent: 4092715 (1978-05-01), Scriver
patent: 4155119 (1979-05-01), De Ward et al.
patent: 4419728 (1983-12-01), Larson

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