Kyosuke Yasuda Takao Miura Isamu Shioya Distributed Processes on Tree Hash. 10-13 2006 conf/compsac/2006 COMPSAC (2) http://doi.ieeecomputersociety.org/10.1109/COMPSAC.2006.128 db/conf/compsac/compsac2006-2.html#YasudaMS06