312-76 · Question #103
Which of the following cryptographic system services assures the receiver that the received message has not been altered?
The correct answer is D. Integrity. Integrity guarantees that a message arrives exactly as it was sent - any unauthorized modification, whether accidental or deliberate, is detectable, typically through mechanisms like hash functions or MACs (Message Authentication Codes). Authentication (A) verifies who sent the…
Question
Which of the following cryptographic system services assures the receiver that the received message has not been altered?
Options
- AAuthentication
- BNon-repudiation
- CConfidentiality
- DIntegrity
How the community answered
(28 responses)- A14% (4)
- B4% (1)
- C7% (2)
- D75% (21)
Explanation
Integrity guarantees that a message arrives exactly as it was sent - any unauthorized modification, whether accidental or deliberate, is detectable, typically through mechanisms like hash functions or MACs (Message Authentication Codes). Authentication (A) verifies who sent the message, not whether its contents were tampered with. Non-repudiation (B) prevents the sender from denying they sent the message - it's about accountability, not alteration detection. Confidentiality (C) keeps the message secret from unauthorized parties but says nothing about whether it was changed in transit.
Memory tip: Think of Integrity as keeping the message Intact - if even one bit flips, integrity mechanisms catch it.
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