A-LevelComputer ScienceSecurity, privacy and data integrity9618/31 · May/June 2024 · Q75 Marks

Describe what is meant by a digital certificate.

(a)Describe what is meant by a digital certificate.[3]
(b)Explain the role of a digital certificate in creating a digital signature.[2]

Mark scheme

Marking points from the official mark scheme (May/June 2024). The mark or mark type is shown in brackets.

[3] 7(a) One mark per point (max 3)
7(a) MP1 A digital certificate is an electronic/online document.
7(a) MP2 used to authenticate/prove the identity of a website/the online identity of an individual/organisation
7(a) MP3 typically issued by a CA
7(a) MP4 For example: it contains information identifying a website owner/individual and a public key
[2] 7(b) One mark per point (max 2)
7(b) MP1 The digital certificate provides the public key
7(b) MP2 that can be used to validate the private key associated with the organisation/website/digital signature

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Topic: Security, privacy and data integrity, A-Level Computer Science (syllabus 9618). Structured question, 5 marks.
Source: A-Level Computer Science, May/June 2024 Paper 3 Variant 1, question 7.

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