Jun Xu 0022 Lei Hu 0003 Zhangjie Huang Liqiang Peng Modular Inversion Hidden Number Problem Revisited. 537-551 2014 ISPEC https://doi.org/10.1007/978-3-319-06320-1_39 conf/ispec/2014 db/conf/ispec/ispec2014.html#XuHHP14