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Protecting computer systems against hackers

Protecting computer systems against hackers involves creating  counter-  measures to the three 

main types of hacking outlined above. For gaining access to systems via passwords, policies 

can be developed to reduce the risk of access. One simple approach is to mandate that new 

passwords are required every month and that they contain at least one number and a mix of 

upper and lower case. This prevents users using simple passwords which are easily guessed. 

Education is required to reduce the risk of passwords falsely obtained through ‘social engi-

neering’, but this will never completely remove the threat.