Data protection method of cnf formula in outsourcing process of sat problem solving

Abstract

The invention discloses a CNF formula data protection method in the SAT problem solving outsourcing process. The method includes the following implementation steps that a Husk formula S2 and a Husk solution Hr are generated; an original CNF formula S1 and an original CNF formula S2 are mixed to generate a novel CNF formula S and a variable mapping table M on the premise that solution space is kept unchanged; data to be solved are converted into CNF formula data through the novel CNF formula S to be outsourced to a far-end server, and the received CNF formula data are solved through the far-end server to acquire a mixed solution Or; the mixed solution Or is de-mapped based on the variable mapping table M, an actual variable which is marked and mapped to the original CNF formula S1 in the variable mapping table M in the de-mapping process is filled into an original solution R to conduct correctness verification, and finally the original solution R corresponding to the mixed solution Or is acquired. By means of the CNF formula data protection method, any CNF formula S1 can be mixed so as to hide the structural information included in the CNF formula S1, it is guaranteed that the mixed CNF formula S can use an original SAT solver for solving, and correctness verification can further be conducted on outsourcing computational results.

Description

technical field [0001] The invention relates to a data privacy protection technology for computing outsourcing in a cloud computing environment, in particular to a CNF formula data protection method in the outsourcing process of solving SAT problems. Background technique [0002] The solution of SAT (Proposition Satisfiable) problem has been widely used in the field of software and hardware verification. In recent years, on the one hand, with the increasing scale of software and hardware, the scale of SAT problems serving hardware verification has also expanded rapidly, thus posing severe challenges to users' computing infrastructure. On the other hand, the current mature cloud computing and grid computing models can provide elastic computing resources according to the application scale, thus becoming an effective means to deal with this challenge. Therefore, it is becoming a new trend to use cloud computing or grid computing to distribute SAT problems on remote multi-compu...

AI Technical Summary

Problems solved by technology

[0043] The technical problem to be solved by the present invention is: in view of the above problems, provide a method that can deform and confuse the CNF formula data before outsourcing it to grid nodes or cloud computing servers to hide the contained structural information without affecting SAT Normal solution, can guarantee the CNF formula after confusion can also use the SAT problem solved by the original SAT solver to calculate the CNF formula data protection method in outsourcing

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