Achieving Fine-Grained and Flexible Access Control on Blockchain-Based Data Sharing for the Internet of Things  

作　　者：Ruimiao Wang Xiaodong Wang Wenti Yang Shuai Yuan Zhitao Guan 

机构地区：[1]School of Control and Computer Engineering,North China Electric Power University,Beijing 102206,China [2]Department of Finance,Operations,and Information Systems,Brock University,Canada

出　　处：《China Communications》2022年第6期22-34,共13页中国通信（英文版）

基　　金：supported by the National Natural Science Foundation of China under Grant 61972148。

摘　　要：The traditional centralized data sharing systems have potential risks such as single point of failures and excessive working load on the central node.As a distributed and collaborative alternative,approaches based upon blockchain have been explored recently for Internet of Things(IoTs).However,the access from a legitimate user may be denied without the pre-defined policy and data update on the blockchain could be costly to the owners.In this paper,we first address these issues by incorporating the Accountable Subgroup Multi-Signature(ASM)algorithm into the Attribute-based Access Control(ABAC)method with Policy Smart Contract,to provide a finegrained and flexible solution.Next,we propose a policy-based Chameleon Hash algorithm that allows the data to be updated in a reliable and convenient way by the authorized users.Finally,we evaluate our work by comparing its performance with the benchmarks.The results demonstrate significant improvement on the effectiveness and efficiency.

关 键 词：blockchain access control smart contract MULTI-SIGNATURE chameleon-hash data sharing Internet of Things 

分 类 号：TN929.5[电子电信—通信与信息系统] TP391.44[电子电信—信息与通信工程] TP311.13[自动化与计算机技术—计算机应用技术]