Which cryptographic mechanism is commonly used to achieve non-repudiation?

The correct answer is B. Digital signatures. Digital signatures achieve non-repudiation by cryptographically binding a message or transaction to the sender's private key, providing proof that only the key owner could have signed it. This prevents the sender from later denying their action. While asymmetric encryption (A)…

Security Principles

Question

Options

AAsymmetric encryption
BDigital signatures
CSymmetric encryption
DHash functions

How the community answered

(56 responses)

A
4% (2)
B
95% (53)
D
2% (1)

Explanation

Digital signatures achieve non-repudiation by cryptographically binding a message or transaction to the sender's private key, providing proof that only the key owner could have signed it. This prevents the sender from later denying their action. While asymmetric encryption (A) underpins digital signatures, encryption alone doesn't provide non-repudiation. Symmetric encryption (C) uses shared keys that can't uniquely identify a sender, and hash functions (D) alone provide integrity but not identity binding.

Topics

#Cryptography#Non-repudiation#Digital signatures#Security services

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