Adaptive Security in Broadcast Encryption Systems (with Short Ciphertexts).

Craig Gentry Brent Waters Adaptive Security in Broadcast Encryption Systems (with Short Ciphertexts). 171-188 2009 EUROCRYPT http://dx.doi.org/10.1007/978-3-642-01001-9_10 conf/eurocrypt/2009 db/conf/eurocrypt/eurocrypt2009.html#GentryW09