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Computer Science · May / June 2024 · Paper 12 · Question 2

0478

As printed in the paper

The question as text

Data can be transmitted from one device to another.

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Show the answer and mark scheme

  • 2(a)[1]

    D

  • 2(b)[1]

    Packet

  • 2(c)(i)[4]

    Data is encrypted and decrypted using the same key (1 mark)

    Any three from:

    Plain text is encrypted into cipher text // cipher text is decrypted into plain text
    Data is encrypted using an algorithm …
    … that uses a key
    The key can be generated using an algorithm
    The key is transmitted to the receiver

  • 2(c)(ii)[1]

    Any one from:

    To help keep the data secure
    To make the data meaningless
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