A security service which is being provided to the recipient when a sender encrypts a message by using his or her own private key is non-repudiation.
Non-repudiation can be defined as an assurance that the sender of a message is given a proof of delivery and the recipient of this message is also provided with a proof of the sender’s identity, so none of them can deny having processed the message.
This ultimately implies that, non-repudiation is a security service which is being provided to the recipient when a sender encrypts a message by using his or her own private key.
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