Yuichi Komano Kazuo Ohta Atsushi Shimbo Shin-ichi Kawamura Provably Secure Multisignatures in Formal Security Model and Their Optimality. 107-118 2008 91-A IEICE Transactions 1 http://dx.doi.org/10.1093/ietfec/e91-a.1.107 db/journals/ieicet/ieicet91a.html#KomanoOSK08