Software reverse engineering (SRE) consists of analyzing the design and implementation of software, where, typically, we assume that the executable file is available, but not the source code. SRE has many legitimate uses, including analysis of software when no source code is available and probing code for security vulnerabilities. Attackers also use SRE to search for weaknesses in closed-source software and to hack software activation mechanisms, or otherwise change the intended function of software. There are many tools available to aid the aspiring reverse engineer. For example, there are several tools that recover design patterns from Java byte code or source code. In this project, we develop and analyze a technique to obfuscate design patterns. We show that our technique can defeat design pattern detection tools, thereby making reverse engineering attacks more difficult.