How computers are used to gain illegal access for personal information?

You can use computers to "hack" into other networks but you must bypass things like firewalls and security systems first. When your in a network if you have all the passWords to people's accounts then you have free access to there information, It's not easy for a person such as myself but it is possible.

But there are professionals who could do it about 20 minutes. The Government even employs people to do such things.