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A study about application to medical information system of electronic authentication technique and encryption technique of medical information

医疗信息电子认证技术和加密技术在医疗信息系统中的应用研究

基本信息

批准号：
09672304
负责人：
KUMAMOTO Ichiro
金额：
$ 2.05万
依托单位：
Kagoshima University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1999
项目状态：
已结题

项目摘要

A mission of information system is turning from stand-alone process into information sharing by Internet. However, we cannot transmit medical information by network easily, because it is private information of a patient.By this study, we developed the network system to make safe sharing of medical information possible between hospitals using Internet. In addition, we inspected that we could share medical information smoothly.The special features of this experimental system are VLAN (Virtual LAN) on duplex ATM switches, two-stage firewall, and VPN (Virtual Private Network). We built VLAN for hospital information system, VLAN for distance diagnosis on the ATM network, and we connected with internal firewall between VLAN for hospital information system and VLAN for distance diagnosis, and connected between Internet and VLAN for distance diagnosis with external firewall. The external firewall has VPN system called "SOCKSVPN". We installed E-mail server, information sharing server, RADIUS a … More uthentication server, key management server, access router on VLAN for distance diagnosis.The assessment of this system went with the following procedure. As medical information testing data, we registered patient information and moving image (MPEG) for education to information sharing server, and we examined file transfer, transmit and receive of E-mail, pictorial image shared system with two kinds of terminal that we assumed to be hospital exterior. One of terminal was connected to the access router using INS64 line, and the another terminal was connected to fire wall from Internet with VPN system.With connection experiment by access router, At first we input the password that Secure ID card displayed, and we could connect to access router. After one minute passed, a password that Secure ID card displayed was changed, we could not connect to access router by using old password. We identified that it was security level the same as physical cipher. The transmission performance by FTP was 62±2kbps.With connection experiment by SOCKSVPN, when we confirmed mail arrival, we needed 12±2s in the first time authentication. It was 3±1s after the second time effective for authentication cache. When it attached graphic file (95 Kbytes) to mail, the transfer time was 27±2s. The transmission rate at having forwarded the same image file with using FTP was 51±4kbps.By this study, this system proved that safe information sharing was possible without big delay. Less

信息系统的一个使命是从独立的过程转变为通过Internet实现信息共享。然而，由于医疗信息是病人的私人信息，不能轻易地通过网络传输，因此，本研究开发了一个网络系统，使医疗信息在医院之间通过Internet安全共享成为可能。本实验系统的特点是在双工ATM交换机上实现了VLAN（虚拟局域网）、两级防火墙和VPN（虚拟专用网）。我们在ATM网络上建立了医院信息系统的VLAN、远程诊断的VLAN，并在医院信息系统的VLAN和远程诊断的VLAN之间连接了内部防火墙，在Internet和远程诊断的VLAN之间连接了外部防火墙。外部防火墙有VPN系统，称为“SOCKSVPN”。我们安装了E-mail服务器、信息共享服务器、RADIUS和 ...更多信息对本系统进行了详细的评估，主要包括：验证服务器、密钥管理服务器、VLAN上的接入路由器等。作为医疗信息测试数据，我们将患者信息和教育用运动图像（MPEG）注册到信息共享服务器，并使用我们假设为医院外部的两种终端来检查文件传输、电子邮件的发送和接收、图像共享系统。其中一台终端通过INS 64线连接到接入路由器，另一台终端通过VPN系统从Internet连接到防火墙，通过接入路由器进行连接实验，首先输入安全ID卡显示的密码，就可以连接到接入路由器。一分钟后，安全ID卡显示的密码被更改，我们无法使用旧密码连接到访问路由器。我们发现它的安全级别与物理密码相同。FTP传输性能为62± 2kbps，SOCKSVPN连接实验表明，当确认邮件到达时，第一次认证时间为12±2s。认证缓存第二次生效后3± 1 s。将95 Kbytes的图形文件附加到邮件中，传输时间为27±2s。利用FTP转发同一图像文件的传输速率为51± 4kbps，证明了该系统可以实现安全的信息共享，且不会产生较大的延迟。少