Fail-Stop Group Signature Scheme

In this study, a fail-stop group signature scheme (FSGSS) that combines the features of and signatures to enhance security level original is proposed. Assuming FSGSS encounters an attack by hacker armed with supercomputer, can prove digital forged. Based on aforementioned objectives, study proposes three lemmas proves they are indeed feasible. First, how does recipient digitally signed document verify authenticity signature? Second, when under dispute, group’s manager determine identity member who document, if necessary, for investigation? Third, one forged following external from supercomputer? Following attack, could be proved without exposing key. addition, ultimate goal stop using same key immediately after discovery forgery attack; would prevent being repeated.