System and method for protecting use of dynamically linked executable modules
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United States of America Patent
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May 26, 1998
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app pub date -
Oct 26, 1995
filing date -
Oct 26, 1995
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Abstract
A computer system has a program module verifier and at least first and second program modules. Each program module includes a digital signature and an executable procedure The first program module furthermore includes a procedure call to the second procedure module, a procedure call to the program module verifier that is logically positioned in the first program module so as to be executed prior to execution of the procedure call to the second program module, and instructions preventing execution of the procedure call to the second program module when the procedure call to the program module verifier results in a verification denial being returned by the program module verifier. The second program module includes an executable procedure to be performed in response to the procedure call by the first program module to the second program module, a procedure call to the program module verifier that is logically positioned in the second program module so as to be executed prior to completion of execution of the second program module's executable procedure, and instructions preventing completion of execution of that executable procedure when the program module verifier returns a verification denial with respect to the first program module. The program module verifier responds to procedure calls by verifying the authenticity of any specified program module and by returning a verification confirmation or denial. When the program module verifier fails to verify the authenticity of a program module, the calling program module throws an exception and aborts its execution.
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Patent Owner(s)
- ORACLE AMERICA, INC.
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- [Patents Count]
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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McManis, Charles E | Sunnyvale, CA | 11 | 933 |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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