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#127Authorization for selective program access to data in multiple address spaces.
Applies to Claims 1,120,61
Last updated: about 1 year ago
Summary / Description
Summary / DescriptionThe multiple address space (MAS) facility of the present invention provides 16 32-bit access registers numbered 0-15. In the access register mode, which results when the DAT is on and PSW bits 16 and 17 are 01 binary, an instruction B or R field that is used to specify the logical address of a storage operand designates not only a general register but also an access register.
 
Basic Information
Type of Prior ArtIssued Patents - US
 
CountryUnited States of America
 
Patent/Application #5023773
 
Kind CodeUnited States (US) - United STATES Patent - A
 
Patentee NameInternational Business Machines Corporation
 
Relevant Pages, Columns, or LinesAbstract
 
URLhttp://patft.uspto.gov/netacgi/...
 
Publication DateFebruary 10, 1988
 
Additional Information
 
Notes / To Do
Notes
 
Excerpt
A program authorization mechanism for authorizing access to an address space in the main memory of a computer system by a program being run under a multiple address space facility. An access-list entry is associated with each address space, each access-list entry being designated by an access-list-entry token contained in an access register. Each access-list entry includes a private indicator which indicates if the associated address space can be accessed by all programs from this access-list entry or if the associated address space can only be accessed by an authorized program. For program to be authorized, an extended authorization index in a control register must match an access-list extended authorization index in the access-list entry, or the extended authorization index value must be authorized in an authority table associated with the address space. An instruction for testing a given extended authorization index for a given access-list-entry is also disclosed.
Relevance
Claims
Claim 120

In a digital computer system having digital data processing means for executing a plurality of digital computer programs for a computer user and memory means for storing digital program instructions and digital data, a method for providing improved computer security comprising the steps of: a) storing digital authorization information in said memory means which restricts an associated program from accessing resources when executed by said digital data processing means which are accessible to said computer user; and b) storing in at least one segment, digital data for associating said authorization information with at least one program to be executed by said processing means for said computer user.
Relevance
a) storing digital authorization information in said memory means which restricts an associated program from accessing resources when executed by said digital data processing means which are accessible to said computer user; and b) storing in at least one segment, digital data for associating said authorization information with at least one program to be executed by said processing means for said computer user.
a) storing digital authorization information in said memory means which restricts an associated program from accessing resources when executed by said digital data processing means which are accessible to said computer user; and b) storing in at least one segment, digital data for associating said authorization information with at least one program to be executed by said processing means for said computer user.
Claim Chart
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Claim 61

In a digital computer system for providing improved computer security having digital data processing means for executing a plurality of digital computer programs for a computer user and memory means for storing digital program instructions and digital data, apparatus for protecting a digital computer user from operations typically performable by a digital computer program executing on behalf of a user comprising: a) means for storing digital authorization information in said memory means which restricts an associated program from performing operations, when executed by said processing means, which are available to said computer user; and b) means for storing in at least one segment digital data for associating said authorization information with at least one program to be executed by said processing means.
Relevance
a) means for storing digital authorization information in said memory means which restricts an associated program from performing operations, when executed by said processing means, which are available to said computer user; and b) means for storing in at least one segment digital data for associating said authorization information with at least one program to be executed by said processing means.
a) means for storing digital authorization information in said memory means which restricts an associated program from performing operations, when executed by said processing means, which are available to said computer user; and b) means for storing in at least one segment digital data for associating said authorization information with at least one program to be executed by said processing means.
Claim Chart
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Claim 1

In a digital computer system having a digital data processing means for executing a plurality of digital programs and a memory means for storing digital program instructions and digital data, apparatus for protecting a digital computer user from operations typically performable by a digital computer program executing on behalf of a user comprising: a) means for storing a plurality of digital authorization entries in said memory means, wherein said entries qualify operations which an associated program is permitted to perform when executed by said processing means; and b) means for storing in at least one segment, digital data for associating said authorization entries with at least one program.
Relevance
a) means for storing a plurality of digital authorization entries in said memory means, wherein said entries qualify operations which an associated program is permitted to perform when executed by said processing means; and b) means for storing in at least one segment, digital data for associating said authorization entries with at least one program.
a) means for storing a plurality of digital authorization entries in said memory means, wherein said entries qualify operations which an associated program is permitted to perform when executed by said processing means; and b) means for storing in at least one segment, digital data for associating said authorization entries with at least one program.
Claim Chart
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