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Computer Science · May / June 2025 · Paper 11 · Question 6

0478

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The question as text

Data can be encrypted using asymmetric encryption.

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  • 6(a)[8]

    One mark for each correct term in the correct position

    algorithm
    plain text
    cipher text
    meaningless
    public/private
    private/public (must be opposite of MP5)
    public
    private

    Data is encrypted using an encryption key. This is a type of algorithm that scrambles the plain text and turns it into cipher text. This makes the data meaningless.

    A public/private key is used to encrypt the data. This key cannot be used to decrypt the data. A private/public key is used to decrypt the data. Any device is able to request the public key, but only your device knows the private key.

  • 6(b)[1]

    Any one from:

    The process is more secure.
    Do not need to worry about key exchange.
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