Flexible Threshold Ring Signature in Chronological Order for Privacy Protection in Edge Computing
Zhiwei Wang, Jiaxing Fan · IEEE Transactions on Cloud Computing · 2020
Edge computing can process data at the network edge rather than in the remote cloud. To protect the security of the collected data, blockchain can be used in edge computing. Any request sent from an edge server requesting data storage is a transaction added into the blockchain, which should include the data owners’ signature. For protecting the privacy of data owners, a threshold ring signature can be utilized for the blockchain. In this article, we propose a flexible threshold ring signature scheme in chronological order that has two advantages for solving theupdate problemandchronological problemin practice. Our scheme is a nontrivial extension of Yuenet al.’s signature scheme and has three security properties:unforgeability,anonymity,andchronological sorting. We prove our scheme without random oracles and test our scheme over the Intel Edison development platform simulating practical edge servers.