基于信任值的云存储数据确定性删除方案

发布时间：2018-01-05 02:08

本文关键词：基于信任值的云存储数据确定性删除方案　出处：《计算机科学》2014年06期 　论文类型：期刊论文

【摘要】：数据确定性删除是云存储安全的研究热点。目前云存储中分散式的数据确定性删除方案在密钥分量存储时没有考虑DHT((Distributed Hash Table)节点可信性,使得用户在授权时间内也存在无法访问自己敏感数据的问题。为此提出了一种基于信任值的云存储数据确定性删除方案,该方案的核心是对DHT节点进行可信度评价,密钥分量的存储选择可信度较高的节点。与已有的确定性删除方案相比,该方案仍然是利用DHT网络的动态特性实现密钥的定期删除,使得用户敏感数据能够在特定的一段时间之后自动销毁。不同的是,该方案在将密钥分量分发到DHT网络中时倾向于选择可信度高的节点进行交互,使得在密钥的过期时间戳之前从DHT网络中得到足够多的密钥分量来恢复出密钥的可能性大大提高,降低了用户在授权时间内无法访问自己敏感数据的概率。实验结果表明,该方案不仅可以有效地抑制恶意节点,还可以提高密钥分量提取成功率,从而增加用户在授权时间内访问自己敏感数据的成功率。
[Abstract]:Delete data uncertainty is a hot research topic in cloud storage security. The cloud storage distributed data deletion scheme without considering the uncertainty in the key components of DHT storage (Distributed Hash (Table) node credibility, so that the user is unable to access their sensitive data in the authorized time. This paper proposes a scheme to remove cloud the stored data uncertainty based on trust value, the core of this method is the credibility of the evaluation on the DHT node, the key component of the storage node selection with high reliability. Compared with the existing deterministic deletion scheme, the scheme is still the key to realize the dynamic characteristics using DHT network regularly delete, makes the user sensitive data can be automatically destroyed after a certain period of time. The difference is the key component in the program, will be distributed to the DHT network when you tend to choose nodes with high reliability The interaction, before the expiration time stamp key from the DHT network to obtain the key component enough to restore a key possibility of greatly improved, reducing the probability of users can not access their sensitive data in the authorized time. Experimental results show that the scheme can effectively suppress the malicious nodes, but also can improve the key component extraction the success rate, thereby increasing user access to sensitive data in their authorized time success rate.

【作者单位】：四川师范大学计算机学院;中国科学院计算技术研究所;
【基金】：国家自然科学基金(61373162) 四川省教育厅青年基金项目(08zb02) 四川师范大学校级项目(201314)资助
【分类号】：TP333;TN918.4
【正文快照】： 1引言数据确定性删除是云存储安全的研究热点,因为在云存储模式下,数据的存储和处理都是在CSP的服务器上实现的,脱离了用户的控制范围,即使数据以密文状态保存在CSP处也可能会存在一些安全隐患。例如CSP为了提高服务的可靠性,数据会做多个备份[1]。用户要求CSP删除其数据时,CS

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