Computer Science for IGCSE & O level - The Internet And Its Uses (Section 9 - No. 27)
Which of the following would be used to help prevent unauthorized access to data?
Using strong passwords.
Encrypting sensitive files.
Installing a firewall.
Installing spyware.
Explanation
Strong passwords, file encryption and firewalls all protect data against unauthorized access. Spyware is used to collect data by unauthorized means.
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