Sanjeev Setia Samir Koussih Sushil Jajodia Eric Harder Kronos: A Scalable Group Re-Keying Approach for Secure Multicast. 215-228 2000 IEEE Symposium on Security and Privacy http://computer.org/proceedings/s%26p/0665/06650215abs.htm db/conf/sp/sp2000.html#SetiaKJH00