On the mean number of encryptions for tree-based broadcast encryption schemes.

E. C. Park Ian F. Blake On the mean number of encryptions for tree-based broadcast encryption schemes. 215-238 2006 4 J. Discrete Algorithms 2 http://dx.doi.org/10.1016/j.jda.2005.03.003 db/journals/jda/jda4.html#ParkB06