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Cambridge AS & A Level Computer Science

17Security

Security in Cambridge AS & A Level Computer Science: what the syllabus expects you to know, the learning objectives and how to practise.
Topic42 practice questions2 lessons

In this topic

Lessons

  • Encryption: symmetric and asymmetric keys

    55 min

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  • SSL/TLS, digital certificates and digital signatures

    55 min

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Sample question

A sample question on this topic. Answer it, check it, then read the worked answer.

Security: sample question

1 mark

Which key does a sender use to encrypt a message so that only the receiver can read it?

Choose one answer

Turn Security into a strength.

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