BIB-VERSION:: CS-TR-v2.0 ID:: STAN//CS-TR-81-846 ENTRY:: June 05, 1995 ORGANIZATION:: Stanford University, Department of Computer Science TITLE:: The Byzantine Generals strike again TYPE:: Technical Report AUTHOR:: Dolev, Danny DATE:: March 1981 PAGES:: 30 ABSTRACT:: Can unanimity be achieved in an unreliable distributed system? This problem was named "The Byzantine Generals Problem," by Lamport, Pease and Shostak [1980]. The results obtained in the present paper prove that unanimity is achievable in any distributed system if and only if the number of faulty processors in the system is: 1) less than one third of the total number of processors; and 2) less than one half of the connectivity of the system's network. In cases where unanimity is achievable, algorithms to obtain it are given. This result forms a complete characterization of networks in light of the Byzantine Problem. NOTES:: [Adminitrivia V1/Prg/19950605] END:: STAN//CS-TR-81-846