Abstract

The recent assault by a computer virus on the Internet system of defense and research computers has forced a re-evaluation of network vulnerabilities. It has also sparked debate on the tradeoffs involved in implementing better protection measures. The latest virus did not destroy data and so was relatively benign. Nevertheless, the incident raised considerable anxiety in the user community and forced systems personnel to waste valuable time restarting the shut-down network, checking files for damage, and closing software holes. A computer virus is a program that enters a computer system, reproduces itself, and initiates unauthorized operations, ranging from display of on-screen messages to destruction of files. This virus was allegedly sent out on Nov. 2 from Cornell University by computer science graduate student Robert T. Morris Jr. Cornell is a backbone site on NSFnet, a part of Internet that connects over 200 research facilities. From Cornell, the virus spread across Internet, infecting VAX and Sun ...

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