t and received by the parties claiming to have sent and received the message, and of providing proof of the integrity and origin of data, both in an unforgeable relationship, which can be verified by any third party at any time. [General Dictionaries] 
n., A security service which prevents the receiver of a message from denying that the message had been received . [Arts] 
n., In reference to digital security, nonrepudiation means to ensure that a transferred message has been sent and received by the
parties