Science and Development Network (SciDev.Net)
The importance of information management cost has increased because of the increased utilization of electronic information, and it is becoming increasingly difficult to ignore security cost. Generally, the information system means the computer environment based electronic data system, and information security means computer system based electronic information security. Electronic information can be stored on a variety of platforms. Thus, there are various types of information security. Sensitive Information (SI) have a high value among information and need to special measure for communication and management. Special measure means the information encryption, access control, policy control and so on.