A Linear Homomorphic Proxy Signature Scheme Based on Blockchain for Internet of Things  

作　　者：Caifen Wang Bin Wu 

机构地区：[1]College of Big Data and Internet,Shenzhen Technology University,Shenzhen,518118,China [2]School of Electronic and Information Engineering,Lanzhou Jiaotong University,Lanzhou,730070,China

出　　处：《Computer Modeling in Engineering & Sciences》2023年第8期1857-1878,共22页工程与科学中的计算机建模（英文）

基　　金：funded by the Special Innovation Project forGeneral Colleges and Universities in Guangdong Province (Grant No.2020KTSCX126).

摘　　要：The mushroom growth of IoT has been accompanied by the generation of massive amounts of data.Subject to the limited storage and computing capabilities ofmost IoT devices,a growing number of institutions and organizations outsource their data computing tasks to cloud servers to obtain efficient and accurate computation while avoiding the cost of local data computing.One of the most important challenges facing outsourcing computing is how to ensure the correctness of computation results.Linearly homomorphic proxy signature(LHPS)is a desirable solution to ensure the reliability of outsourcing computing in the case of authorized signing right.Blockchain has the characteristics of tamper-proof and traceability,and is a new technology to solve data security.However,as far as we know,constructions of LHPS have been few and far between.In addition,the existing LHPS scheme does not focus on homomorphic unforgeability and does not use blockchain technology.Herein,we improve the security model of the LHPS scheme,and the usual existential forgery and homomorphic existential forgery of two types of adversaries are considered.Under the new model,we present a blockchain-based LHPS scheme.The security analysis shows that under the adaptive chosen message attack,the unforgeability of the proposed scheme can be reduced to the CDH hard assumption,while achieving the usual and homomorphic existential unforgeability.Moreover,comparedwith the previous LHPS scheme,the performance analysis shows that our scheme has the same key size and comparable computational overhead,but has higher security.

关 键 词：Homomorphic signature proxy signature security model provable security UNFORGEABILITY 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]