After sending a message, the sender should not be able to, at a later date, deny having sent the message, is referred to as:
(A) Authenticity (B) Non-Repudiability
(C) Auditability (D) Repudiability
Nonrepudiation is the assurance that someone cannot deny something. Typically, nonrepudiation refers to the ability to ensure that a party to a contract or a communication cannot deny the authenticity of their signature on a document or the sending of a message that they originated.