A number of proposals have been suggested to tackle data integrity and privacy concerns in cloud storage in which some existing schemes suffer from vulnerabilities in data dynamics. In this paper, we propose an improv...A number of proposals have been suggested to tackle data integrity and privacy concerns in cloud storage in which some existing schemes suffer from vulnerabilities in data dynamics. In this paper, we propose an improved fairness and dynamic provable data possession scheme that supports public verification and batch auditing while preserves data privacy. The rb23Tree is utilized to facilitate data dynamics. Moreover, the fairness is considered to prevent a dishonest user from accusing the cloud service provider of manipulating the data. The scheme allows a third party auditor （TPA） to verify the data integrity without learning any information about the data content during the auditing process. Furthermore, our scheme also allows batch auditing, which greatly accelerates the auditing process when there are multiple auditing requests. Security analysis and extensive experimental evaluations show that our scheme is secure and efficient.展开更多
随着云计算和云存储技术的飞速发展,越来越多的企业和个人使用云存储来保存数据或备份数据.但用户将私有数据上传到云端的同时,也丧失了对数据的绝对控制权,用户数据的隐私保护问题成为云存储发展不得不解决的问题.为了解决这一问题,提...随着云计算和云存储技术的飞速发展,越来越多的企业和个人使用云存储来保存数据或备份数据.但用户将私有数据上传到云端的同时,也丧失了对数据的绝对控制权,用户数据的隐私保护问题成为云存储发展不得不解决的问题.为了解决这一问题,提出一种新的针对云存储的数据隐私保护方法BSBC（Bit Split Bit Combine）,它在上传前,将数据按照比特位进行拆分,重新组装后形成多个数据文件,再分别上传到云存储服务器;下载时,先将所有数据文件下载,然后通过位合并再恢复成原始文件.实验证明这种方法可以保护用户数据的隐私,同时可比传统加解密获得17～35倍的性能提升.然后将核心的位拆分、位合并代码模块用汇编语言进行优化,对汇编语言进行指令调度优化,以减少数据冲突和流水线停顿.最终,采用BSBC方法比传统加解密可以获得25～35倍的性能提升.展开更多
基金Supported by the Doctoral Fund of the Ministry of Education priority Areas of Development Projects(20110141130006)the Natural Science Foundation of Hubei Province(ZRZ0041)
文摘A number of proposals have been suggested to tackle data integrity and privacy concerns in cloud storage in which some existing schemes suffer from vulnerabilities in data dynamics. In this paper, we propose an improved fairness and dynamic provable data possession scheme that supports public verification and batch auditing while preserves data privacy. The rb23Tree is utilized to facilitate data dynamics. Moreover, the fairness is considered to prevent a dishonest user from accusing the cloud service provider of manipulating the data. The scheme allows a third party auditor （TPA） to verify the data integrity without learning any information about the data content during the auditing process. Furthermore, our scheme also allows batch auditing, which greatly accelerates the auditing process when there are multiple auditing requests. Security analysis and extensive experimental evaluations show that our scheme is secure and efficient.
文摘随着云计算和云存储技术的飞速发展,越来越多的企业和个人使用云存储来保存数据或备份数据.但用户将私有数据上传到云端的同时,也丧失了对数据的绝对控制权,用户数据的隐私保护问题成为云存储发展不得不解决的问题.为了解决这一问题,提出一种新的针对云存储的数据隐私保护方法BSBC（Bit Split Bit Combine）,它在上传前,将数据按照比特位进行拆分,重新组装后形成多个数据文件,再分别上传到云存储服务器;下载时,先将所有数据文件下载,然后通过位合并再恢复成原始文件.实验证明这种方法可以保护用户数据的隐私,同时可比传统加解密获得17～35倍的性能提升.然后将核心的位拆分、位合并代码模块用汇编语言进行优化,对汇编语言进行指令调度优化,以减少数据冲突和流水线停顿.最终,采用BSBC方法比传统加解密可以获得25～35倍的性能提升.
