The commensurate number of the attacks and infringement targeting a vulnerability of the game service has been increasing constantly, due to the dramatic growth and expansion of the impact of the game industry. However, there exist no subsequent researches for the differentiated technology, which is to prevent the reverse function of the game service. Therefore, in this study, we examined the current status of infringement toward online game services which are provided in the market currently and designed the proper technical measures ('Software Tamper Resistance') for a manipulation of the game service which is the most vulnerable part. In detail, we have encrypted an execution file and decrypted it in real time process. After that we implemented antibebugging, disassemble, and antidump technology.