Maximum Security, Fourth Edition

Chapter 18. Trojans

IN THIS CHAPTER

• What Is a Trojan?

• Where Do Trojans Come From?

• How Often Are Trojans Really Discovered?

• What Level of Risk Do Trojans Represent?

• How Do I Detect a Trojan?

• Resources

	“For they still prefer sheep to thinking men Ah, but men who think like sheep are even better”
	--Brian McNeill, “No Gods and Precious Few Heroes”

	“Beware of geeks bearing gifts”
	--Anonymous

This chapter examines a type of threat to system and Internet security that has been with us almost as long as the computer: Trojan horses, often simply referred to as Trojans.

What Is a Trojan?

Trojan horses present more difficulties in definition than at first appears. Whereas viruses are defined primarily by their capability to replicate, Trojans are primarily defined ...