Computer system security method and apparatus having program authorization information data structures
INFORMATION PROTECTION AND AUTHENTICATION OF TEXAS, LLCThe holder of the '717 patent has sued Microsoft, Symantec, CA, F-Secure, McAfee, Kaspersky, Sophos, Novell, and PC Tools for infringing this patent.
Last updated: about 1 year ago
Summary / Description
| Summary / Description | An object of the present invention, in view of the above problems, is to provide a memory protection system in which memory protection information can be readily altered with no intervention of a control program. |
Basic Information
| Type of Prior Art | Issued Patents - US |
| Country | United States of America |
| Patent/Application # | 4434464 |
| Kind Code | United States (US) - United STATES Patent - A |
| Patentee Name | Hitachi, Ltd. |
| Relevant Pages, Columns, or Lines | Abstract |
| URL | http://patft.uspto.gov/netacgi/... |
| Publication Date | March 31, 1981 |
| Additional Information | The publication date given is actually the filing date. |
Notes / To Do
| Notes | |
Excerpt
In a memory protection system for a computer, memory protection information provided for each of the memory areas of a memory and memory protection information provided for each of the programs executed by a processor are collated to determine allowance/inhibition of access to the memory. By detecting that an instruction to be executed is an instruction having a particular operation and that an address of the memory to be accessed by the instruction is a particular address, the memory protection information for the program executed by the processor is alterd to allow the memory access. The alteration of memory protection information is carried out with no intervention of a control program.
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
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
Claim Chart
All
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
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
Claim Chart
All
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
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
Claim Chart
All
