Which of the following security concepts is being followed when implementing a product that offers protection against DDoS attacks?

Non-repudiation refers to the assurance that someone cannot deny the validity of their signature on a document or the sending of a message. While important in cybersecurity, particularly in transaction verification and authentication, it does not directly relate to protection mechanisms against DDoS attacks, which focus primarily on maintaining service access.

Integrity involves maintaining the accuracy and consistency of data over its lifecycle. Although integrity is crucial for data protection, it does not address the primary concern of service accessibility during a DDoS attack. The focus here is on ensuring that the data remains unchanged rather than ensuring that a service remains available.

Confidentiality ensures that sensitive information is accessed only by authorized individuals. While vital for data protection, confidentiality does not directly pertain to DDoS attack mitigation, which is more concerned with keeping services operational rather than protecting data from unauthorized access.