What does non-repudiation mean in the context of cybersecurity?

In the context of cybersecurity, non-repudiation refers to the assurance that an individual or entity cannot deny the validity of their actions. This concept is crucial for establishing accountability in digital communications and transactions. When non-repudiation is in place, it provides evidence that a specific action was taken, such as sending a message or completing a transaction, and this evidence can be used to verify the identity of the person or entity involved.

For example, digital signatures and secure logging mechanisms help to ensure non-repudiation by providing irrefutable proof of who performed an action. This is particularly important in legal and financial transactions where disputes may arise. Non-repudiation enhances trust between parties and ensures that all individuals are held accountable for their actions within a cybersecurity framework.