Dongyoung Koo

KIPS Transactions on Computer and Communication Systems, Vol. 11, No. 8, pp. 259-268, Aug. 2022
https://doi.org/10.3745/KTCCS.2022.11.8.259,   PDF Download:
Keywords: Trusted Execution Environment, Privacy, Encryption, Deduplication, Efficiency
Abstract

With prosperous usage of cloud services to improve management efficiency due to the explosive increase in data volume, various cryptographic techniques are being applied in order to preserve data privacy. In spite of the vast computing resources of cloud systems, decrease in storage efficiency caused by redundancy of data outsourced from multiple users acts as a factor that significantly reduces service efficiency. Among several approaches on privacy-preserving data deduplication over encrypted data, in this paper, the research results for improving efficiency of encrypted data deduplication using trusted execution environment (TEE) published in the recent USENIX ATC are analysed in terms of security and efficiency of the participating entities. We present a way to improve the stability of a key-managing server by integrating it with individual clients, resulting in secure deduplication without independent key servers. The experimental results show that the communication efficiency of the proposed approach can be improved by about 30% with the effect of a distributed key server while providing robust security guarantees as the same level of the previous research.

Statistics
Cite this article