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Computer Science · Oct / Nov 2022 · Paper 11 · Question 4

0478

As printed in the paper

The question as text

Rebekah discovers that her bank details have been used fraudulently. She thinks her bank details were stolen electronically, whilst she was using the Internet.

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

Show the answer and mark scheme

  • 4(a)[6]

    One mark for identification of the method (max 2), two marks for describing how the method could be used

    Phishing
    A legitimate looking email is sent to her, asking her to click a link
    … this takes her to a fake website where she enters her bank details
    Pharming
    She accidentally downloads malicious software onto her computer
    … this redirects her legitimate website requests to a fake website where she enters her bank details
    Hacking
    A person gains unauthorised access to her computer
    .. they steal/view a data file that contains her bank details
    Spyware
    Records the key presses on her computer
    … this data is analysed for patterns and her bank details are identified

  • 4(b)(i)[1]

    The data will be meaningless if it is stolen

  • 4(b)(ii)[4]

    One from:

    Data is encrypted and decrypted using the same key/algorithm

    Any three from:

    Data before encryption is known as plain text
    Data after encryption is known as cypher text
    Key is sent to receiver (to allow data to be decrypted) // Values are sent to receiver that are used to generate key

  • 4(b)(iii)[3]

    Any three from:

    Firewall // proxy server
    Password
    Biometric device
    Virtual measure e.g. onscreen keyboard
    Two-step verification // two factor authentication
    Physical methods
    Antimalware // Antispyware // Antivirus
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