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Which of the following best describes non-repudiation?

A. It protects the signer of a document from fraud.

B. Once an official document is sent, it can't be unsent.

C. It prevents a user from forging or tampering with a signature.

D. Once a document is signed, someone cannot later deny they signed it.

Answer :

Final answer:

Non-repudiation ensures that once a document is signed, the signer cannot later deny signing it, thus holding them accountable. This principle is vital for establishing trust in electronic transactions and communications. Digital signatures are one method used to achieve non-repudiation.


Explanation:

Understanding Non-Repudiation

Non-repudiation is a key concept in law and information security, playing a crucial role in ensuring accountability and trust in communications and transactions. It refers to the ability to ensure that a person or entity cannot deny the authenticity of their signature or the sending of a message. The correct answer to the question is:

  1. Once a document is signed, someone cannot later deny they signed it.

This means that if a document is signed, the signer is held accountable for that action and cannot later claim they did not sign it. Non-repudiation is achieved using various methods, such as digital signatures, which provide a verifiable record that can be used to confirm the identity of the signer, thus preventing them from denying their involvement.

Importance of Non-Repudiation

Non-repudiation helps to build trust in electronic transactions and document exchanges, as parties can be assured of the integrity and origin of the information they receive. For instance, in online banking, non-repudiation prevents customers from falsely claiming they did not authorize a transaction, thus protecting both the bank and the customer.


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