A program that appears to
have a useful function but that contains a
hidden function that presents a security risk
Man-in-the-middle: attacker monitors network
packets, modifies them, and inserts them back
into network
Denial-of-service (DoS) attack: An attack on a
Web site in which an attacker uses specialized
software to send a flood of data packets to the
target computer with the aim of overloading its
resources