John Dilley Bruce M. Maggs Jay Parikh Harald Prokop Ramesh K. Sitaraman William E. Weihl 50-58 2002 6 IEEE Internet Computing 5 http://doi.ieeecomputersociety.org/10.1109/MIC.2002.1036038 db/journals/internet/internet6.html#DilleyMPPSW02