Approximation Algorithms for Key Management in Secure Multicast

Agnes Hui Chan Rajmohan Rajaraman Zhifeng Sun Feng Zhu Approximation Algorithms for Key Management in Secure Multicast http://arxiv.org/abs/0904.4061 2009 CoRR abs/0904.4061 db/journals/corr/corr0904.html#abs-0904-4061 informal publication