Non-repudiation

as one of the basic network security services

must provide mechanisms in which evidence will be generated

collected and maintained to protect the transacting parties against any false denial in which a particular event or action has taken place.In addition

fairness is a desirable requirement such that neither party can gain an advantage by quitting prematurely or otherwise misbehaving during a transaction.Aiming at solving a serious bug: the selective receipt problem in the current ISO/IEC 13888 non-repudiation mechanism

which is induced by unfairness

this paper presents a Fair non-repudiation protocol FNORP and through a strict formal analysis.We show that FNORP possesses the capabilities of non-repudiation

fairness and timely-termination.