ITPEC IP April 2026 Question 35
ITPEC IP April 2026 — Question 35 of 100
A and C — a digital signature authenticates the signer and detects modification, but does not conceal the message.
The sender signs a digest with a private key. Verification with the corresponding public key supports sender authenticity (A); a changed message produces a different digest, revealing tampering (C). Preventing reading in transit (B) requires encryption.
Answer (b)
Why not others: (a) and (d) incorrectly include confidentiality statement B; (c) omits authentication A and still includes B.
Key rule: Digital signature provides authenticity and integrity; encryption provides confidentiality.
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