Trojan Horse
Concise Oxford English Dictionary © 2008 Oxford University Press:
Trojan Horse
▶noun something intended to undermine or secretly overthrow an enemy or opponent.
■ a program designed to breach the security of a computer system while ostensibly performing an innocuous function.
– origin from the hollow wooden statue of a horse in which a number of Greeks are said to have concealed themselves in order to enter Troy.
'Trojan Horse' also found in these Oxford entries:
