1.Cyber terrorist - a programmer who breaks into computer systems in order to steal or change or destroy information as a form of cyber-terrorism.

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 performs an attack, ie hacker.

3. Cyber criminal - are persons that committed crime using a computer and the internet to steal a person's identity or sell contraband or stalk victims or disrupt operations with malevolent programs.


Sources: http://thefreedictionary.com,
www.tsl.state.tx.us/ld/pubs/compsecurity/glossary.html,