Ciphered Password, SSL Protocol and Real-time Ciphered Database for Regional Medical Network

Abstract

 【Object】 We have developed some intranet systems for regional medical services with the aim of assisting information sharing and medical cooperation. The systems also support medical education after graduate for general practitioners. We rebuilt these systems which are safe in Internet and have high security to internal attack. 【Methods】 We use a ciphered password which cannot be input by a keyboard as recognition of a user. It is generated in a server computer and delivered to each person with offline media. We compared VPN and SSL for secured data communication and adopted SSL form. The most unique technology of our security system is a real-time ciphered database. Transferred data to the server computer are encoded and stored to the database immediately. 【Results】 We can make three security mechanisms without any other commercial products than Microsoft Windows Server and InterSystems Cache database. A copy of the database cannot be read. Each data will be decoded in real-time for the user who is recognized as the legal user. 【Conclusion】 Almost injustice accesses have been performed by internal staff in Japan. Our security system is very effective also in such situations.