Trojan Horses, Computer Viruses and Worms
A program which is different from the specified (specs) one, is said to contain a Trojan horse. The Trojan horse may be malicious. It is difficult to decide whether a program is free of Trojan horses.
use digitally signed computer programs. Provided these digitally signed programs were developed in a secure and trusted environment, then one can detect modifications to the digitally signed program . (For implementation issues see .) If the environment was not trusted, known computer viruses may be in the digitally signed program and remain undetected unless virus scanners are used.
use virus scanners. To a known computer virus corresponds a fingerprint(also known as a “signature” in the computer virus literature). Before running a program (e.g., at the start-up of...
- Davida, G.I., Y.G. Desmedt, and B.J. Matt (1989). “Defending systems against viruses through cryptographic authentication.” Proceedings 1989 IEEE Symposium on Security and Privacy, IEEE Computer Society, May 1989, Oakland, CA, 312–318.Google Scholar
- Hoffman, L.J. (ed.) (1990). Rogue Programs: Viruses, Worms and Trojan Horses. Van-Nostrand Reinhold, New York.Google Scholar