System and method for static detection and categorization of information-flow downgraders
US10742666B2 · kind B2 · utility
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Key dates
| Filing date | Feb 4, 2016 |
| Grant date | Aug 11, 2020 |
| Priority date | — |
| Expiry date | May 23, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/6218
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system and method for static detection and categorization of information-flow downgraders includes transforming a program stored in a memory device by statically analyzing program variables to yield a single assignment to each variable in an instruction set. The instruction set is translated to production rules with string operations. A context-free grammar is generated from the production rules to identify a finite set of strings. An information-flow downgrader function is identified by checking the finite set of strings against one or more function specifications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.