Ali Bagherzandi Stanislaw Jarecki Multisignatures Using Proofs of Secret Key Possession, as Secure as the Diffie-Hellman Problem. 218-235 2008 SCN http://dx.doi.org/10.1007/978-3-540-85855-3_15 conf/scn/2008 db/conf/scn/scn2008.html#BagherzandiJ08