Differentially Authorized Deduplication System Based on Blockchain  

作　　者：ZHAO Tian LI Hui YANG Xin WANG Han ZENG Ming GUO Haisheng WANG Dezheng 

机构地区：[1]Shenzhen Graduate School,Peking University,Shenzhen 518055,China [2]ZTE Corporation,Shenzhen 518057,China

出　　处：《ZTE Communications》2021年第2期67-76,共10页中兴通讯技术（英文版）

基　　金：This work was supported by ZTE Industry-University-Institute Cooperation Funds under Grant No.2019ZTE03-01;National Keystone R&D Program of China under Grant No.2017YFB0803204;National Natural Science Foundation of China(NSFC)under Grant No.61671001;Guangdong Provincial R&D Key Program under Grant No.2019B010137001;Shenzhen Research Programs under Grant Nos.JCYJ20190808155607340,JSGG20170406144032901,JSGG20170824095858416 and JCYJ20170306092030521;PCL Future Regional Network Facilities for Large-scale Experiments and Applications under Grant No.PCL2018KP001.

摘　　要：In architecture of cloud storage, the deduplication technology encrypted with theconvergent key is one of the important data compression technologies, which effectively improvesthe utilization of space and bandwidth. To further refine the usage scenarios for varioususer permissions and enhance user’s data security, we propose a blockchain-based differentialauthorized deduplication system. The proposed system optimizes the traditionalProof of Vote (PoV) consensus algorithm and simplifies the existing differential authorizationprocess to realize credible management and dynamic update of authority. Based on thedecentralized property of blockchain, we overcome the centralized single point fault problemof traditional differentially authorized deduplication system. Besides, the operations oflegitimate users are recorded in blocks to ensure the traceability of behaviors.

关 键 词：convergent key DEDUPLICATION blockchain differential authorization 

分 类 号：TP311.13[自动化与计算机技术—计算机软件与理论] TP309[自动化与计算机技术—计算机科学与技术]