ITPEC FE Morning October 2023 Question 38
ITPEC FE Morning October 2023 — Question 38 of 80
Digital signature properties — what a digital signature guarantees about transmitted information.
A digital signature provides two key security properties:
- •Authenticity — confirms the message is genuinely from the claimed sender (verified via the signer's public key)
- •Integrity — confirms the message has not been altered or tampered with during transmission (verified via hash comparison)
Why not others:
- (a) Atomicity and consistency — these are ACID database transaction properties, not security properties
- (c) Availability and confidentiality — digital signatures do NOT encrypt content (no confidentiality) and do not guarantee availability
- (d) Durability and isolation — also ACID database properties, unrelated to digital signatures
Key rule: Digital signature = authenticity + integrity. For confidentiality, you need encryption, not a signature.
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