A New Obfuscation Scheme in Constructing Fuzzy Predicates

Based on the technique of code obfuscation in software protection, a new obfuscation scheme in constructing opaque predicates was proposed, which increased the complexity by employing the pseudo-random sequence and a group of Diophantine equations´ solutions to construct a family of parameterized opaque predicates. To protect the output of the opaque predicates, the data chain list was dynamically generated. Pseudo-random sequence was also used to disturb the attackers´ tracking debug. The complication of decompile was increased through block cryptosystems that convert the output of the opaque predicates into the corresponding judge conditions.