(by extension) A subversive person or device placed within the ranks of the enemy. / (computer security) A malicious program that is disguised as legitimate software.

(Greek mythology) The hollow wooden horse by which the Greeks allegedly gained access to Ilium/Troy during the Trojan War.

Alternative form of Trojan-horse

Alternative form of Trojan horse

(idiomatic) To introduce slyly, to sneak in, to subvert. / (computer security) To install a Trojan horse.

plural of Trojan horse