|“||[t]he ability of a user to deny having performed an action that other parties cannot prove otherwise. For example, a user who deleted a file can successfully deny doing so if no mechanism (such as audit files) can contradict that claim.||”|
|“||[d]enial by one of the entities involved in a communication of having participated in all or part of the communication.||”|
- ITU, "Compendium of Approved ITU-T Security Definitizons," at 42-43 (Feb. 2003 ed.) (full-text).