Daniele Micciancio Saurabh Panjwani Corrupting One vs. Corrupting Many: The Case of Broadcast and Multicast Encryption. 70-82 2006 conf/icalp/2006-2 ICALP (2) http://dx.doi.org/10.1007/11787006_7 db/conf/icalp/icalp2006-2.html#MicciancioP06