Protecting User Privacy in a Multi-Path Information-Centric Network Using Multiple Random-Caches

作     者：Wei-Bo Chu Li-Fang Wang Ze-Jun Jiang Chin-Chen Chang 

作者机构：School of Computer Science and Technology Northwestern Polytechnical University Xi'an 710072 China Department of Information Engineering and Computer Science Feng Chia University Taichung Taiwan 40724 China 

出 版 物：《Journal of Computer Science & Technology》 (计算机科学技术学报（英文版）)

年 卷 期：2017年第32卷第3期

页      面：585-598页

核心收录：

学科分类：12[管理学] 1201[管理学-管理科学与工程(可授管理学、工学学位)] 0808[工学-电气工程] 08[工学] 0835[工学-软件工程] 0701[理学-数学] 0811[工学-控制科学与工程] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：The work was supported by the Young Scientists Fund of the National Natural Science Foundation of China under Grant No. 61502393 and the Aeronautical Science Foundation of China under Grant No. 2014ZD53049 

主　　题：information-centric network (ICN) user privacy cache snooping random-cache multi-path 

摘      要：In-network caching is a fundamental mechanism advocated by information-centric networks （ICNs） for efficient content delivery. However, this new mechanism also brings serious privacy risks due to cache snooping attacks. One effective solution to this problem is random-cache, where the cache in a router randomly mimics a cache hit or a cache miss for each content request/probe. In this paper, we investigate the effectiveness of using multiple random-caches to protect cache privacy in a multi-path ICN. We propose models for characterizing the privacy of multi-path ICNs with random-caches, and analyze two different attack scenarios： 1） prefix-based attacks and 2） suffix-based attacks. Both homogeneous and heterogeneous caches are considered. Our analysis shows that in a multi-path ICN an adversary can potentially gain more privacy information by adopting prefix-based attacks. Furthermore, heterogeneous caches provide much better privacy protection than homogeneous ones under both attacks. The effect of different parameters on the privacy of multi-path random-caches is further investigated, and the comparison with its single-path counterpart is carried out based on numerical evaluations. The analysis and results in this paper provide insights in designing and evaluating multi-path ICNs when we take privacy into consideration.