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Research Paper | Computer Science & Engineering | India | Volume 4 Issue 4, April 2015
Homomorphic Encryption & A Novel Key Management Technique to Support Data Aggregation in Mobile Sensing
Farhat Afshan, Shameem Akther
The proliferation and ever-increasing capabilities of mobile devices such as smart phones give rise to a variety of mobile sensing applications. This paper studies how an untrusted aggregator in mobile sensing can periodically obtain desired statistics over the data contributed by multiple mobile users, without compromising the privacy of each user. Although there are some existing works in this area, they either require bidirectional communications between the aggregator and mobile users in every aggregation period, or have high-computation overhead and cannot support large plaintext spaces. Also, they do not consider the Min aggregate, which is quite useful in mobile sensing. To address these problems, we propose an efficient protocol to obtain the Sum aggregate, which employs an additive homomorphic encryption and a novel key management technique to support large plaintext space. We also extend the sum aggregation protocol to obtain the Min aggregate of time-series data. To deal with dynamic joins and leaves of mobile users, we propose a scheme that utilizes the redundancy in security to reduce the communication cost for each join and leave. Evaluations show that our protocols are orders of magnitude faster than existing solutions, and it has much lower communication overhead.
Keywords: Mobile sensing, Privacy, data aggregation
Edition: Volume 4 Issue 4, April 2015
Pages: 3273 - 3277
How to Cite this Article?
Farhat Afshan, Shameem Akther, "Homomorphic Encryption & A Novel Key Management Technique to Support Data Aggregation in Mobile Sensing", International Journal of Science and Research (IJSR), https://www.ijsr.net/search_index_results_paperid.php?id=SUB153999, Volume 4 Issue 4, April 2015, 3273 - 3277
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