Preface Quantum Cryptographic Protocols and Quantum Security (Laszlo Gyongyosi, Sandor Imre, Department of Telecommunications, Budapest University of Technology and Economics, Budapest, Hungary) Low-Cost Mutual Authentication Protocols (Mu’awya Naser, Pedro Peris-Lopez, Mohammad Rafie, Rahmat Budiarto, School of Computer Sciences, Unvirisity Sinas Malaysia, Pinang, Malaysia, and other…