現行國軍所使用的電子化採購系統雖說已完成電子化的初步目標，但距離真正的全面使用電子化尚有努力的空間，其原因不外乎安全性的考量。由於電子資料必須在網際網路上進行處理、儲存，可能提高資料外洩風險帶來的疑慮，本文以密碼學理論為基礎，強化國軍電子化採購系統的安全性，並導入自我認證之多重文件盲簽章機制來強化目前採購系統上的安全疑慮，避免製發憑證的過程中會有偽冒用戶身分的安全弱點，同時也可以降低公鑰儲存、計算與管理的成本與風險；本研究的具體優點為有效的減少盲簽章次數、簡化傳輸作業時間及多重盲簽章手續，強化廠商身分認證及投標文件內容遭窺探與篡改等安全問題。

Although the military e-procurement system has reached the beginning goal of the electronic, but still have efforts to achieve comprehensive utilizes. The reason is the security consideration. Electronic data processed and stored on the Internet may increase the risk of data leakage. The study based on cryptography theory to enhance the security of military e-procurement system, and further to induce self-certified Multi-document blind signature scheme to mitigate the security concerns on the current procurement system and to avoid the counterfeiting user identity weakness of issue certificate process. At the same time, it can also reduce the cost and risks of public key storage, computation and management. Our study is not only to reduce blind signature times, to simplify the transmission time and multiple blind signature operation, but also solves the snooping and tampering problems of identification and document.