The computer misuse act is a legislation which defines electronic vandalism, unauthorised access to computer systems and information theft.
Part 1:
Unauthorised access to computer material. For example, accessing data or programs which you should not have access to.
Part 2:
Unauthorised access with intent to commit further offences. For example, accessing someone’s details to commit fraud.
Part 3:
Unauthorised access with intent to impair the operations of a computer. For example, Sending a virus that causes a computer to malfunction.