Home / Definitions / Nonrepudiation


Vangie Beal
Last Updated May 24, 2021 7:50 am

In reference to digital security, nonrepudiation means to ensure that a transferred message has been sent and received by the parties claiming to have sent and received the message. Nonrepudiation is a way to guarantee that the sender of a message cannot later deny having sent the message and that the recipient cannot deny having received the message.

Nonrepudiation can be obtained through the use of:

  • digital signatures— function as a unique identifier for an individual, much like a written signature.
  • confirmation services — the message transfer agent can create digital receipts to indicated that messages were sent and/or received.
  • timestamps — timestamps contain the date and time a document was composed and proves that a document existed at a certain time.