Guest editorial

Are computer and communications networks adequately protected from unauthorized access or misuse? Much information stored in computers and transmitted over the various communications networks that connect them represents valued property that is vulnerable to unauthorized access and disclosure, fraudulent manipulation, and disruption. Also, the expanding scope of networks for data communications includes important functions such as electronic funds transfer, stock transfers, valuable corporate data transfers, and the use of the networks for personal and sensitive data communications. These functions coupled with the advent of the Integrated Service Digital Network, generate an increased awareness of privacy issues, and in particular, information and network security, the topic of this special issue of IEEE Network Magazine. To address these issues, we have invited several authors, all of whom are exceptionally well qualified, to write on several topics in network security.