5. Using software to protect systems

firewall A business can also use software to help protect their systems.

Some of these methods include:

- Data encryption - data is 'scrambled' before being transmitted through a network. Only the authorised recipient has the 'key'.

- Firewalls - software to block access from outside (and to prevent data being sent out in some cases)

- Activity or Audit logs - to track who has been doing what on the system

- User IDs and Passwords

- Access rights

Challenge see if you can find out one extra fact on this topic that we haven't already told you

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