Information Media Center of Kanazawa University is taking charge of distributing security measures software such as antivirus software. In addition, software asset management is started this fiscal year, and the numbers of PC and software license in all faculties are managed. Due to the software asset management, a unique ID is assigned to a PC. By combining the ID with user authentication, we developed a new software distribution system. In the new system, we can identify PC and installed software which was downloaded through our system. In this paper, we introduce the configuration of the new system, and authentication mechanism implemented in it.