Protection of data file contents

Details Protection of data file contents Protection of data file contents

1973-07-09

1979-01-16

Thomas, James D.

Boots, shoes, and leggings

G06F 1110, G06F 1300

Patent

active

041352408

ABSTRACT:
An improved arrangement for controlling access to data files by computer users. Access permission bits are used in the prior art to separately indicate permissions for the file owner and nonowners to read, write and execute the file contents. An additional access control bit is added to each executable file. When this bit is set to one, the identification of the current user is changed to that of the owner of the executable file. The program in the executable file then has access to all data files owned by the same owner. This change is temporary, the proper identification being restored when the program is terminated.

REFERENCES:
patent: RE27239 (1971-11-01), Ulrich
patent: RE27251 (1971-12-01), Amdahl et al.
patent: 3368207 (1968-02-01), Beausoleil et al.
patent: 3377624 (1968-04-01), Nelson et al.
patent: 3469239 (1969-09-01), Richmond
patent: 3576544 (1971-04-01), Cordero et al.
patent: 3599159 (1971-08-01), Creech et al.
patent: 3631405 (1971-12-01), Hoff
patent: 3683418 (1972-08-01), Martin
patent: 3735364 (1973-05-01), Hatta
patent: 3742458 (1973-06-01), Inoue et al.
patent: 3761883 (1973-09-01), Alvarez

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