Ass.

1. Definition of Perpetrator?
- One who perpetrates; esp., one who commits an offense or crime.
Source: http://www.allwords.com/word-perpetrator.html
- Is the robber, assailant, counterfeiter, etc. -the person who actually committed the crime. The suspect may be a different person from the perpetrator, or there may have been no actual crime, which would mean there is no perpetrator.

2. Definition of Cyber Criminals?
- A person who gains illegal entrance into a computer system or who diverts financial transfers into his or her own account.
Source: http://www.pcmag.com/encyclopedia_term/0,2542,t=cybercriminal&i=40630,00.asp

Cybercrime can take the form of cyber stalking, where they follow you around into various chatrooms and harass you online. Everything can be destroy by cybercriminals. They can wipe entire hard drives, steal your entire life and everything about it and essentially just mess your entire world.
Source: http://www.articlebase.com/internet-articles/cyber-crime-criminals-and-prevention-575109.html

3. Definition of Cyberterrorist?
-Hacker-- a programmer who breaks into computer systems in order to steal or change or destroy information as a form of cyber-terrorism.
Source: http://wordnetweb.princeton.edu/perl/webwn?s=cyber-terrorist
- is a controversial term. Some authors choose a very narrow definition, relating to deployments, by known terrorist organizations, of disruption attacks against information systems for the primary purpose of creating alarm and panic.
Source: http://en.wikipedia.org/wiki/Cyberterrorism