新的云存储文件去重复删除方法
发布时间：2018-07-26 06:46
【摘要】：去重被广泛地应用于云存储服务中以节省带宽和存储资源,然而,客户端去重复化删除中仍存在安全缺陷,使外部攻击者可访问用户私有数据。基于密文的跨用户的去重复化删除方案Xu-CDE被首次提出,该方案支持在外部攻击者和诚实且好奇的服务器同时存在的场景下保护数据隐私,具有良好的理论意义和代表性。然而该方案中的用户所有权认证凭据缺乏实时性保护,以致不能抵抗重放攻击。针对该缺陷,提出改进方案云存储中基于MLE与随机数改进的客户端密文去重(MRN-CDE),引入随机因子以保障认证凭据的实时性,并利用MLE-KP算法通过原始文件提取密钥代替用文件本身作为加密密钥,在提高安全性的同时大大降低了运算量。经过安全性分析与测试,结果表明,所提出的改进方案MRN-CDE在Xu-CDE方案的基础上,不仅增强所有权认证的安全性,而且在时间效率上也有所提高,对于云端大文件的文件去重效果尤其佳,具有一定的应用价值。
[Abstract]:Weight removal is widely used in cloud storage services to save bandwidth and storage resources. However, there are still security defects in client repeating deleting, which enables an external attacker to access user private data. A cross user deduplication scheme based on ciphertext is first proposed, which is supported by an external attacker and honest and honest. The curious server protects data privacy at the same time, and has good theoretical significance and representativeness. However, the user ownership authentication credentials in this scheme are lack of real-time protection and can not resist replay attacks. In view of the defect, a client ciphertext based on improved MLE and random numbers in the improved cloud storage is proposed. (MRN-CDE), the random factor is introduced to ensure the real time of the authentication credentials, and the MLE-KP algorithm is used to extract the key from the original file instead of the file itself as the encryption key. The security is greatly reduced while the security is improved. The results show that the proposed improvement scheme, MRN-CDE, is in the Xu-CDE scheme. On the basis, it not only enhances the security of the ownership certification, but also improves the time efficiency. It is especially good for the file of the large files in the cloud. It has a certain value of application.
【作者单位】： 西安电子科技大学网络与信息安全学院;西安邮电大学计算机学院;
【基金】：国家自然科学基金资助项目(No.61672415,No.61671360,No.61672413) 陕西省教育厅科研基金资助项目(No.14JK1665)~~
【分类号】：TP333;TP309
，
本文编号：2145192
[Abstract]:Weight removal is widely used in cloud storage services to save bandwidth and storage resources. However, there are still security defects in client repeating deleting, which enables an external attacker to access user private data. A cross user deduplication scheme based on ciphertext is first proposed, which is supported by an external attacker and honest and honest. The curious server protects data privacy at the same time, and has good theoretical significance and representativeness. However, the user ownership authentication credentials in this scheme are lack of real-time protection and can not resist replay attacks. In view of the defect, a client ciphertext based on improved MLE and random numbers in the improved cloud storage is proposed. (MRN-CDE), the random factor is introduced to ensure the real time of the authentication credentials, and the MLE-KP algorithm is used to extract the key from the original file instead of the file itself as the encryption key. The security is greatly reduced while the security is improved. The results show that the proposed improvement scheme, MRN-CDE, is in the Xu-CDE scheme. On the basis, it not only enhances the security of the ownership certification, but also improves the time efficiency. It is especially good for the file of the large files in the cloud. It has a certain value of application.
【作者单位】： 西安电子科技大学网络与信息安全学院;西安邮电大学计算机学院;
【基金】：国家自然科学基金资助项目(No.61672415,No.61671360,No.61672413) 陕西省教育厅科研基金资助项目(No.14JK1665)~~
【分类号】：TP333;TP309
，
本文编号：2145192
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