Tsai, H. M.H. M.TsaiKuo, S. Y.S. Y.KuoLei, C. L.C. L.LeiChang, C. C.C. C.Chang2009-04-272018-07-062009-04-272018-07-061993-12http://ntur.lib.ntu.edu.tw//handle/246246/154107en-USA Dynamic Cryptographic Key Assignment Scheme in a Tree Structure for Access Controlconference paper