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Title: US5584023: Computer system including a transparent and secure file transform mechanism
[ Derwent Title ]


Country: US United States of America

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17 pages

 
Inventor: Hsu, Mike S. C.; San Jose, CA 95131

Assignee: None

Published / Filed: 1996-12-10 / 1993-12-27

Application Number: US1993000175192

IPC Code: Advanced: G06F 1/00; G06F 21/00;
IPC-7: G06F 9/44; G06F 12/14; H03M 7/30; H04L 9/32;

ECLA Code: G06F21/62B; S06F221/2107;

U.S. Class: Current: 001/001; 707/999.204; 710/068; 711/164; 712/209; 713/165; 717/136; 718/100;
Original: 395/620; 395/670; 395/701; 395/888; 395/491; 380/004; 380/025;

Field of Search: 395/425,600,650,725,700,404,405,406,412,413,419,438,439,490,888,479,491 380/004,3,23,25

Priority Number:
1993-12-27  US1993000175192

Abstract:     A computer system including a file transform mechanism, such as encryption, compression, encoding, translation and conversion, a file storage subsystem for storing a file composed of one or more blocks of data, a data storage subsystem for storing blocks of data in first and second logical data areas and a processor for executing instructions implementing a computer operating system in the first logical data area and an application program in the second logical data area. The processor is coupled to the file storage subsystem and the data storage subsystem for transferring a predetermined block of data between the file storage subsystem and the data storage subsystem. The processor includes (1) a transform mechanism, defined within the operating system, for transforming the predetermined block of data in the first logical data area separately from any other block of data; (2) a request mechanism, defined by the application program, for selecting the predetermined block of data to be operated on; and (3) an interface that controls the transfer of the predetermined block of data between the file storage subsystem and the data storage subsystem and between the first and second logical data areas. The interface can determine whether the predetermined block of data is transformed. The interface controls the transfer of the predetermined block of data from the file storage subsystem to the data storage subsystem and between the first and second logical data areas, transforming the data as required.

Attorney, Agent or Firm: Fliesler, Dubb, Meyer & Lovejoy ;

Primary / Asst. Examiners: Gossage, Glenn;

INPADOC Legal Status: Show legal status actions          Buy Now: Family Legal Status Report

Designated Country: AU CA EP JP 

Family: Show 3 known family members

First Claim:
Show all 16 claims
I claim:     1. A computer system including a file transform mechanism, said system comprising:
  • a) a file storage subsystem that provides for the storage of a file composed of one or more blocks of data;
  • b) a memory providing for the storage of blocks of data in first and second logical data areas within said memory;
  • c) a processor, including programming, providing for the execution of instructions implementing a computer operating system in said first logical data area and an application program in said second logical data area, said processor being coupled to said file storage subsystem and said memory to permit the transfer of a predetermined block of data between said file storage subsystem and said memory, said processor including
    • i) a transform function, defined by the execution of instructions of said computer operating system, for translating said predetermined block of data between first and second data representations in said first logical data area separately from another block of data;
    • ii) a request function, defined by the execution of instructions of said application program, for selecting said predetermined block of data to be operated on by the execution of instructions of said application program in said second logical data area; and
    • iii) an interface function, defined by the execution of instructions of said computer operating system and coupled to said transform function and said request function, that controls the transfer of said predetermined block of data between said file storage subsystem and said memory and between said first and second logical data areas of said memory, said interface function determining whether said predetermined block of data is in said first or second data representations and wherein said interface function, responsive to said request function, controls the transfer of said predetermined block of data from said file storage subsystem to said memory and from said first logical data area to said second logical data area selectively through said transform function.


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Forward References: Show 185 U.S. patent(s) that reference this one

       
U.S. References: Go to Result Set: All U.S. references   |  Forward references (185)   |   Backward references (7)   |   Citation Link

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PDF
Patent  Pub.Date  Inventor Assignee   Title
Get PDF - 7pp US4588991  1986-05 Atalla  Atalla Corporation File access security method and means
Get PDF - 20pp US4780905  1988-10 Cruts et al.  Nightwatch, Inc. Computer data encryption system
Get PDF - 16pp US5007082  1991-04 Cummins  Kelly Services, Inc. Computer software encryption apparatus
Get PDF - 11pp US5052040  1991-09 Preston et al.  Micronyx, Inc. Multiple user stored data cryptographic labeling system and method
Get PDF - 14pp US5113442  1992-05 Moir  Lachman Associates, Inc. Method and apparatus for providing access control in a secure operating system
Get PDF - 36pp US5175852  1992-12 Johnson et al.  International Business Machines Corporation Distributed file access structure lock
Get PDF - 27pp US5463772  1995-10 Thompson et al.  Hewlett-Packard Company Transparent peripheral file systems with on-board compression, decompression, and space management
       
Foreign References: None

Other Abstract Info: DERABS G1995-246589

Other References:
  • SCO® UNIX® System V1386 Development System, Device Driver Writer's Guide, Santa Cruz Operation, Inc., Santa Cruz, Calif., pp. 1--1 to 4-39 (no date listed).
  • Bach, "The Design of the UNIX® Operating System," Prentice-Hall, Inc. (England Cliffs, NJ), 1986.


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