Non-repudiation

According to Baker and Cooper (1995), nonrepudiation functions provide evidence that a transaction or specific action actually happened. An example is a system taking measures to ensure that a transferred message has been sent and received by the parties claiming to have sent and received the message. It 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. Non-repudiation is accomplished through functions such as electronic signatures, transmission encryption, or time stamping and transaction recording in an audit trail record (Maheu, et. al., 2001).

Sources:

Baker, D. B., & Cooper, T. (1995). Information system security issues for health care. Manuscript in preparation, Science Applications International Corp. and Kaiser Permanente. Maheu, M., Whitten, P., and Allen, A. (2001) E-Health, Telehealth, and Telemedicine: A Guide to Startup and Success. San Francisco: Jossey-Bass, p.120.