NICOSIA (Reuters) - An online voyeur was jailed for four years in Cyprus on Monday for spying on a teenage girl over a webcam in her bedroom that he switched on remotely.

The 47-year-old was found guilty of installing "Trojan Horse" software in the computer of a 17-year-old he met in an online chatroom. Prosecutors said he sent the girl malware as an email attachment, which he used to switch on her webcam remotely.

The defendant then watched the girl without her knowledge over an extended period of time. She told her parents when he traced her mobile number and started to harass her.

A district court in the capital Nicosia sentenced the man on Monday after a trial held in camera to conceal the identity of the girl, who was under the legal age consent of 18 when the case was reported in 2005.

(Writing by Michele Kambas, editing by Tim Pearce)