The Computer Misuse Act

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The Computer Misuse Act, 1990 was passed to deal with the problem of hacking of computer systems. In the early days of hacking, the problem wasn’t taken very seriously – it was seen as mischievous behaviour, rather than as something which could cause serious loss or problems to companies, organisations and individuals. Before 1990, it was difficult to prosecute people for hacking – existing laws were not written with that in mind. However, it became increasingly clear that hacking should be against the law, and that the laws should be effective and enforceable. As a result, the Computer Misuse Act was passed in 1990.

The Act created three new offences:

• Unauthorised access to computer material

• Unauthorised access with intent to commit or facilitate commission of further offences

• Unauthorised modification of computer material.

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Unauthorised access to computer material

This is the lowest level of offence. It includes, for example, finding or guessing someone’s password, then using that to get into a computer system and have a look at the data it contains. This is an offence even if no damage is done, and no files deleted or changed. The very act of accessing materials without authorisation is illegal. This offence carries a penalty of imprisonment up to six months and/or a fine.

Unauthorised access with intent to commit or facilitate commission of further offences

This builds on the previous offence. The key ...

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