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ZIMSEC A-Level Computer Science

4.4Keeping data safe in storage and transmission

Keeping data safe in storage and transmission in ZIMSEC A-Level Computer Science: what the syllabus expects you to know, the learning objectives and how to practise.
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Overview

From the objective 'describe how data is kept safe during storage and transmission' (encryption tools); code ours.

Learning objectives

What the syllabus expects you to be able to do.

  1. 4.4.1Describe how data is kept safe during storage and transmission, including encryption.

Lessons

  • Encryption: symmetric and asymmetric keys

    55 min

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Sample question

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

Keeping data safe in storage and transmission: 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 Keeping data safe in storage and transmission into a strength.

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