CSSLP · Question #242
Which of the following terms refers to a mechanism which proves that the sender really sent a particular message?
The correct answer is B. Non-repudiation. Non-repudiation is the security service that provides undeniable proof that the sender originated a message and cannot falsely deny sending it, nor can the receiver falsely deny receiving it.
Question
Which of the following terms refers to a mechanism which proves that the sender really sent a particular message?
Options
- AConfidentiality
- BNon-repudiation
- CAuthentication
- DIntegrity
How the community answered
(29 responses)- A7% (2)
- B90% (26)
- D3% (1)
Why each option
Non-repudiation is the security service that provides undeniable proof that the sender originated a message and cannot falsely deny sending it, nor can the receiver falsely deny receiving it.
Confidentiality ensures that information is not disclosed to unauthorized individuals, focusing on secrecy rather than proof of origin.
Non-repudiation ensures that a party cannot successfully dispute having made a statement or taken an action, providing verifiable proof of the sender's origin of a message, often achieved through digital signatures.
Authentication verifies the identity of the sender or receiver, but it does not inherently prevent them from later denying their action.
Integrity ensures that data has not been altered or destroyed in an unauthorized manner, focusing on the correctness and completeness of the data, not proof of sender origin.
Concept tested: Information security concepts - non-repudiation
Source: https://csrc.nist.gov/glossary/term/non-repudiation
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