Cisco CyberOps Associate (CBROPS) 200-201Security ConceptsMedium
A security architect is designing a system that requires ensuring data not only remains confidential and its integrity is preserved, but also that the sender of the data cannot later deny having sent it. Which cryptographic principle is specifically addressed by the requirement that the sender cannot deny sending the data?
- AConfidentiality
- BNon-repudiation
- CIntegrity
- DAvailability
Show answer & explanationAnswer & explanation
Correct answer: B. Non-repudiation
Non-repudiation is the cryptographic principle that ensures that a party cannot successfully deny the authenticity of their signature on a document or the sending of a message that they originated. This is typically achieved through digital signatures.
Why the other options are wrong
- A. Confidentiality ensures that information is not disclosed to unauthorized individuals.
- C. Integrity ensures that information has not been altered in an unauthorized way.
- D. Availability ensures that information and systems are accessible to authorized users when needed.
Non-repudiation
A security principle that guarantees that the sender of a message or the performer of an action cannot later deny having sent the message or performed the action.
- Often achieved using digital signatures and cryptographic hashing.
- Provides proof of origin and integrity.
- Crucial in legal and financial transactions.
Memory trick: CIA + AAN (Authentication, Authorization, Non-repudiation)