云存储中的ORAM研究综述

Survey of ORAM Research in Cloud Storage

在云存储环境中,服务器或者第三方可以仅通过对用户访问行为进行分析来获取信息,对用户信息安全造成威胁。ORAM通过构造精巧设计的存储结构和冗余的访问机制,有效地隐藏用户访问行为与访问目标之间的对应关系。隐藏用户访问意图的安全访问机制,是现阶段隐藏用户访问模式的主要手段之一。通过对ORAM基本理论和发展历程进行研究,归纳分析了ORAM的基本方案;建立了SSIBT性能评价指标体系,对经典ORAM算法及其优化方案进行了分析比较;最后,在分析现阶段主要研究重点的基础上,总结提出了ORAM未来可能的主要研究方向。

In a cloud storage environment,servers and the third party can fetch information through analyzing the users’access behaviour,which may cause threats to users’information security.ORAM mechanism is one of the main strategies which can hide users’visiting patterns.This mechanism can effectively conceal the corresponding relationships between the access behaviour and the visiting targets.Secure access mechainsm to hide user’s access intention is one of the main means to hide user’s access model at present.Through the study of the basic theories and the development process of the ORAM,this paper concluded the basic scheme of this mechanism and set up a SSIBT performance evaluation index system to make comparisons and analysis between the classic ORAM mechanism and its optimization scheme.Finally,possible research directions of ORAM were summarized based on the main research focus.