Ithasbecomeincreasinglycommontoimplementdiscrete-logarithmbasedpublic-keyprotocolsonellipticcurvesoverfinitefields.Thebasicoperationisscalarmultiplication:takingagivenintegermultipleofagivenpointonthecurve.Thecostoftheprotocolsdependsonthatoftheellipticscalarmultiplicationoperation.Ko