文章基本信息

标题：Technology of Secure File Archiving in the Uniformly Random Distributed Archive Scheme
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作者：Ahmed Tallat ; Hiroshi Yasuda ; Kilho Shin 等
期刊名称：Journal of Information Security
印刷版ISSN：2153-1234
电子版ISSN：2153-1242
出版年度：2013
卷号：4
期号：1
页码：42-53
DOI：10.4236/jis.2013.41006
出版社：Scientific Research Publishing
摘要：This paper investigates the security features of the distributed archive scheme named Uniformly Random Distributed Archive (URDA). It is a simple, fast and practically secure algorithm that meets the needs of confidentiality and availability requirements of data. URDA cuts a file archived into fragments, and distributes each fragment into randomly selected n －k + 1 storages out of n storages. As the result, users only need to access at least k storages to recover original file, whereas stolen data from k －1 storages cannot cover original file. Thus, archived files are nothing but sequences of a large number of fixed length fragments. URDA is proved of disappearing both characters and biased bits of original data in archived files, indicating the probabilities of both a fragment and a bit appearing at particular position are uniformly constant respectively. Yet, through running experiments, we found out the risk of likelihood that URDA might be vulnerable to bit pattern attack due to the different ratios of characters appearing in real world files. However, we solved the problem by modifying URDA with variable fragment lengths, which results in that all the bits in revealed sequences are distributed uniformly and independently at random.
关键词：Cloud Computing; Archive; Secret Sharing; Character Set