A robust (k, n) + 1 threshold proxy signature scheme based on factoring.

RongXing Lu ZhenFu Cao HaoJin Zhu A robust (k, n) + 1 threshold proxy signature scheme based on factoring. 35-45 2005 166 Applied Mathematics and Computation 1 http://dx.doi.org/10.1016/j.amc.2004.04.104 db/journals/amc/amc166.html#LuCZ05b