What does the principle of “non-repudiation” ensure?

The principle of non-repudiation ensures that a party cannot deny the authenticity of their signature or the sending of a message. This concept is critical in cybersecurity and legal contexts, as it provides a way to guarantee that a specific individual performed an action, such as signing a document or sending a communication.

Non-repudiation is usually achieved through mechanisms such as digital signatures or secure logging, which create a verifiable proof that can be referenced in the future. Therefore, when one party claims that they did not authorize a transaction or message, the non-repudiation mechanisms in place can provide the necessary evidence to confirm their involvement.

This principle is vital for maintaining trust and accountability in transactions, particularly in digital communications and contracts. The other choices focus on concepts that do not align with the essence of non-repudiation, highlighting its critical importance in legal and cybersecurity frameworks.