期刊名称：International Journal of Computer Science and Information Technologies
电子版ISSN：0975-9646
出版年度：2011
卷号：2
期号：4
页码：1386-1389
出版社：TechScience Publications
摘要：Server less distributed computing has received significant attention from both the business and the investigate society. Among the most popular applications are the wide-area network file systems, exemplified by CFS, Farsite, and Ocean Store. These file systems store files on a large collection of untrusted nodes that form an overlay network. They use cryptographic techniques to maintain file confidentiality and integrity from malicious nodes. Unfortunately, cryptographic techniques cannot protect a file holder from a denial-ofservice (DoS) attack or a host compromise attack. Hence, most of these distributed file systems are vulnerable to targeted file attacks, wherein an adversary attempts to attack a small (chosen) set of files by attacking the nodes that host them. This paper presents Location Guard—a location hiding technique for securing overlay file storage systems from targeted file attacks. Location Guard has three essential components: 1) location key, consisting of a random bit string (e.g., 128 bits) that serves as the key to the location of a file, 2) routing guard, a secure algorithm that protects accesses to a file in the overlay network given its location key such that neither its key nor its location is revealed to an adversary, and 3) a set of location inference guards, which refer to an extensible component of the Location Guard. Our experimental results quantify the overhead of employing Location Guard and demonstrate its effectiveness against DoS attacks, host compromise attacks, and various location inference attacks.
关键词：File systems; overlay networks; denial-of-service;attacks; performance and scalability; location hiding.s-excel
