"The meaning of the word:"

1.Cyberterrorist-a programmer who breaks into computer system inorder to steal or change or destroy information as a form of cyberterrorism.

2.Perpetrator-The entity from the external environment that is taken to be the cause of a risk.An entity in the external environment that perform and attacks in hacker.

3.CyberCriminal-are persons that committed crime using a computer anf the internet to steal a persons identity or sell contraband or stalk victims or disrupt operations with malevolent programs.
Sourses-http://thefreed dictionary.nom,
www.tsl.state.tx.us/Id/pubs/compsecurity
/glossary.htm,