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Trojan Horses

A trojan horse is a program which hides itself in another apparently benign program. When the victim runs the apparently benign program he or she also ends up running the hidden trojan program.

There are examples of Unix trojan horse programs on the Internet. For example in one incident, a well known anonymous ftp archive was broken into. The attackers modified a popular program available from this site, allowing them to break into computers which subsequently down-loaded and installed this program.

There are a few common sense rules you can use to protect yourself from trojan horses.

Del Armstrong
Fri Oct 25 16:31:41 EDT 1996