摘要
云存储可以使用户在不扩大自身存储的情况下保存更多数据,而客户端去重技术的引入使用户在本地对重复数据进行有效删除,极大提高云存储利用率,节省通信开销.本文利用文献[10]中基于盲签名随机化收敛密钥的思想,提出了一个新的基于客户端密文去重方案.新方案中重复验证标签和拥有权证明可有效抵抗暴力字典攻击,并利用三方密钥协商方案的思想设计了灵活的加密密钥管理方案.实验结果表明新方案能够有效降低用户存储和计算开销.
Cloud storage allows users to maintain more data without expanding their storage,and the introduction of the client-based deduplication technology enables users to effectively delete duplicate data locally,which will greatly improve cloud storage utilization and save communication overhead.In this paper,utilizing the idea of paper[10]to randomize convergent key based on blind signature,a newclient-based ciphertext deduplication scheme is proposed.In the newscheme,the duplication verification tag and proof of ownership procedure can resist brute-force dictionary attack effectively,and a flexible encryption key management method is presented based on three-party key exchange scheme.Additionally,the experimental results reveal the newscheme can provide the users with better storage and computation performance.
作者
贡坚
王少辉
李灿灿
GONG Jian;WANG Shao-hui;LI Can-can(School of Computer Science,Nanjing University of Posts and Telecommunications,Nanjing 210003,China;Key Laboratory of Jiangsu High Technology Research for Wireless Sensor Network,Nanjing 210003,China;Jiangsu Key Laboratory of Big Data Security and Intelligent Processing,Nanjing 210003,China)
出处
《小型微型计算机系统》
CSCD
北大核心
2020年第1期139-143,共5页
Journal of Chinese Computer Systems
基金
国家自然科学基金项目(61373006,61373139,61672016,61872192)资助
江苏省科技支撑计划基金项目(61003236)资助
南京邮电大学校项目(NY214064,NY213036)资助
关键词
云存储
密文去重
拥有权认证
密钥管理
cloud storage
ciphertext deduplication
proof of ownership
key management
