Abstract
We have investigated the technique to improve security on Local Area Network(LAN) in our hospital without expensive software repair of hospital information system. As a result, we found the Virtual Private Network function which is part of the operating system on the hospital terminal provides the required environment.
For a verification, we have introduced a dual Xeon 2.4GHz cpu system, which is much lower than HIS system improvement costs, and confirmed the network bandwidth is approximately 100 Mbps, which is equivalent to the fast Ethernet. Furthermore, the response time of the HIS application is not influenced as much as network bandwidth decrease, since the data transfer time is small comparing to time to query database or to display the information.
We think future hospital information system should be constructed on VPN or IPsec environment to handle the data consistency and security.
