Digital signatures verify the integrity of the data, verify the identity of the sender, and:

Question

Options

• AProvide data confidentiality.
• BEnforce non-repudiation.
• CSign digitalcertificaterequests.
• DCreate certificate requests.

• A
  4% (1)
• B
  88% (21)
• D
  8% (2)

Explanation

Non-repudiation is the third pillar of digital signatures: because a sender's private key is uniquely theirs, they cannot later deny having signed the data - the signature mathematically binds the action to their identity, making it legally and technically undeniable. A is wrong because digital signatures provide authentication and integrity, not confidentiality - encryption handles that. C and D are wrong because signing certificate requests is the role of a Certificate Authority (CA) or the requester using a CSR process, which is distinct from what digital signatures accomplish as a concept.

Memory tip: Think of digital signatures with the acronym NII - Non-repudiation, Integrity, Identity. Confidentiality is the odd one out because it requires encryption, not signatures.

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