Security Technology for Open Networks

Ryoichi Sasaki, D.Eng., Systems Development Laboratory, Hitachi, Ltd.
Taketoshi Sakuraba, Systems Development Laboratory, Hitachi, Ltd.
Hideaki Kobayashi, Strategic Business Development Division of the Information Systems Group, Hitachi, Ltd.
Makoto Oya, Software Development Center, Hitachi, Ltd.


Security technology is becoming more important because of the growth of electronic commerce (EC) and increase in the number of corporate information systems connected to the Internet. The loss of security caused by a third party is classified as: (a) a loss of confidentiality resulting from eavesdropping on networks and wrongful reading of stored information; (b) a loss of integrity resulting from the alteration or destruction of stored data; and (c) a loss of availability resulting from the unauthorized use of computer resources.

Access management and cryptography are direct countermeasures against these threats of the loss of security, while security monitoring, security auditing and security education are considered as indirect measures. A digital signature is a countermeasure against threats of loss of evidence such as repudiation by an opposite party during a transaction.

To realize highly secured systems, Hitachi is not only providing security services such as the integration and operation of secure information systems, but it is also developing security hardware products such as encryption LSI circuits and channel-connected cipher equipment for mainframe computers, and security software products such as encryption libraries, digital signature libraries, and firewall systems armed with encryption capability.

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