LLVM Code Obfuscation Skill

This skill provides comprehensive knowledge of LLVM-based code obfuscation frameworks and techniques for software protection and anti-reverse engineering.

Core Obfuscation Techniques

Control Flow Obfuscation

• Control Flow Flattening (CFF): Transform structured control flow into a single dispatcher loop with state machine
• Bogus Control Flow (BCF): Insert opaque predicates and dead code paths
• CFG Randomization: Randomize basic block ordering and add fake edges

Data Obfuscation

• String Encryption: Encrypt string literals at compile-time, decrypt at runtime
• Constant Substitution: Replace constants with complex expressions
• Variable Splitting: Split variables into multiple components