作者
Jia Xu, Anjia Yang, Jianying Zhou, Duncan S Wong
发表日期
2016
研讨会论文
Computer Security–ESORICS 2016: 21st European Symposium on Research in Computer Security, Heraklion, Greece, September 26-30, 2016, Proceedings, Part I 21
页码范围
324-343
出版商
Springer International Publishing
简介
Proofs of Storage (including Proofs of Retrievability and Provable Data Possession) is a cryptographic tool, which enables data owner or third party auditor to audit integrity of data stored remotely in a cloud storage server, without keeping a local copy of data or downloading data back during auditing. We observe that all existing publicly verifiable POS schemes suffer from a serious drawback: It is extremely slow to compute authentication tags for all data blocks, due to many expensive group exponentiation operations. Surprisingly, it is even much slower than typical network uploading speed, and becomes the bottleneck of the setup phase of the POS scheme. We propose a new variant formulation called “Delegatable Proofs of Storage”. In this new relaxed formulation, we are able to construct a POS scheme, which on one side is as efficient as privately verifiable POS schemes, and on the other side can …
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J Xu, A Yang, J Zhou, DS Wong - Computer Security–ESORICS 2016: 21st European …, 2016