CERTIFIED-IN-CYBERSECURITY Question #226: Real Exam Question with Answer & Explanation

The correct answer is C: Non-repudiation. Non-repudiation is a cryptographic attribute that ensures that a party cannot deny the authenticity of their signature on a document or the sending of a message they originated (see ISC2 Study Guide, Module 1, under Non-repudiation). Authentication verifies the identity of a send

Security Principles

Question

Which cryptographic attribute is demonstrated when Alice proves that Bob's message undeniably came from him?

Options

AIntegrity
BConfidentiality
CNon-repudiation
DAuthentication

Explanation

Non-repudiation is a cryptographic attribute that ensures that a party cannot deny the authenticity of their signature on a document or the sending of a message they originated (see ISC2 Study Guide, Module 1, under Non-repudiation). Authentication verifies the identity of a sender or receiver, while confidentiality refers to protecting the content of the message from unauthorized access. Integrity is about ensuring the message is not altered during transmission. All of these attributes are important for secure communication, but non-repudiation is the only one that ensures the sender of a message cannot deny having sent it.

Topics

#Cryptography#Non-repudiation#Security Principles

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