Rosario Gennaro Stanislaw Jarecki Hugo Krawczyk Tal Rabin Secure Distributed Key Generation for Discrete-Log Based Cryptosystems. 51-83 2007 20 J. Cryptology 1 http://dx.doi.org/10.1007/s00145-006-0347-3 db/journals/joc/joc20.html#GennaroJKR07