Private Broadcasting: An index coding approach
Private Broadcasting: An index coding approach
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私人广播:索引编码方法
DOI:
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发表时间:
2017
期刊:
影响因子:
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通讯作者:
C. Fragouli
中科院分区:
文献类型:
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作者:
Mohammed Karmoose;Linqi Song;Martina Cardone;C. Fragouli
Using a broadcast channel to transmit clients' data requests may impose privacy risks. In this paper, we tackle such privacy concerns in the index coding framework. We show how a curious client can infer some information about the requests and side information of other clients by learning the encoding matrix used by the server. We propose an information-theoretic metric to measure the level of privacy and show how encoding matrices can be designed to achieve specific privacy guarantees. We then consider a special scenario for which we design a transmission scheme and derive the achieved levels of privacy in closed-form. We also derive upper bounds and we compare them to the levels of privacy achieved by our scheme, highlighting that an inherent trade-off exists between protecting privacy of the request and of the side information of the clients.