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Computer Science · May / June 2020 · Paper 12 · Question 3

0478

As printed in the paper

The question as text

A company collects and stores data about its customers. The data is stored on a server in the company’s office. The data is transmitted to cloud storage to create a back-up. The data is encrypted using symmetric encryption before it is sent to the cloud storage.

Read automatically from the paper; the printed page above is exact.

Show the answer and mark scheme

  • 3(a)[4]

    Any four from:

    Encryption key is used
    Encryption algorithm is used
    Encryption key / algorithm is applied to plain text
    … to convert it into cypher text
    Same key is used to encrypt and decrypt the text

  • 3(b)[3]

    Any three from:

    Firewall
    Password
    Proxy server
    Physical methods (by example e.g. CCTV, Locks)
    Access rights
    Asymmetric encryption
    Disconnect from network
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