Certificateless threshold signature from lattice  

作　　者：Huifang Yu Qi Zhang 

机构地区：[1]School of Cyberspace Security,Xi'an University of Posts and Telecommunications,Xi'an,China

出　　处：《Digital Communications and Networks》2024年第4期965-972,共8页数字通信与网络（英文版）

基　　金：supported by the Key Project of Natural Science Basic Research Plan of Shaanxi Province under the Grant 2020JZ-54.

摘　　要：Threshold signature has been widely used in electronic wills,electronic elections,cloud computing,secure multiparty computation and other fields.Until now,certificateless threshold signature schemes are all based on traditional mathematic theory,so they cannot resist quantum computing attacks.In view of this,we combine the advantages of lattice-based cryptosystem and certificateless cryptosystem to construct a certificateless threshold signature from lattice(LCLTS)that is efficient and resistant to quantum algorithm attacks.LCLTS has the threshold characteristics and can resist the quantum computing attacks,and the analysis shows that it is unforgeable against the adaptive Chosen-Message Attacks(UF-CMA)with the difficulty of Inhomogeneous Small Integer Solution(ISIS)problem.In addition,LCLTS solves the problems of the certificate management through key escrow.

关 键 词：LATTICE Threshold signature Inhomogeneous small integer solution Certificateless public key Lattice sampling technique 

分 类 号：TN918.1[电子电信—通信与信息系统]