Yu-Fang Chung Chia-Hui Liu Feipei Lai Tzer-Shyong Chen Threshold Signature Scheme Resistible for Conspiracy Attack. 479-483 2006 conf/pdcat/2006 PDCAT https://doi.org/10.1109/PDCAT.2006.111 https://doi.ieeecomputersociety.org/10.1109/PDCAT.2006.111 db/conf/pdcat/pdcat2006.html#ChungLLC06