What is nonrepudiation in the context of cybersecurity?

Nonrepudiation in cybersecurity refers to the assurance that someone cannot deny the validity of their actions or transactions. This is crucial for maintaining trust in digital communications and transactions. By providing undeniable proof of actions, such as the use of digital signatures or transaction logs, nonrepudiation ensures that individuals or entities are held accountable for their actions. This accountability is vital in preventing disputes, as it provides evidence that can be used to verify what has occurred and who was responsible for it.

In contrast, the other choices focus on different aspects of cybersecurity. For instance, maintaining data integrity is about ensuring that data is accurate and unaltered, while preventing unauthorized access deals with safeguarding data from those who should not have access. Recovering lost credentials pertains to user authentication and access management but does not address the accountability of actions performed by users.