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A PLS blockchain for IoT applications:protocols and architecture

Cybersecurity 2018年第1期1卷 993-1009页

作者： alex shafarenko Department of Computer Science University of HertfordshireHatfield AL109ABUK

This paper proposes an architecture and a protocol suite for a permissioned blockchain for a local IoT *** architecture is based on a sealed Sequencer and a Fog Server running(post-quantum)Guy Fawkes *** blocks of the blockchain are stored in networked Content Addressable Storage alongside any user data and validity *** maintain that a typical IoT device can,despite its resource limitations,use our blockchain protocols directly,without a trusted *** includes posting and monitoring transactions as well as off-chain(post-quantum)emergency communications without an explicit public key.

关键词： Blockchain Guy Fawkes protocol Post-quantum HORS-OTS LoRa Concurrent transmission

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Indexing structures for the PLS blockchain

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Cybersecurity 2021年第1期4卷 561-579页

作者： alex shafarenko University of Hertfordshire AL109AB HertfordshireUK

This paper studies known indexing structures from a new point of view:minimisation of data exchange between an IoT device acting as a blockchain client and the blockchain server running a protocol suite that includes two Guy Fawkes protocols,PLS and *** PLS blockchain is not a cryptocurrency instrument;it is an immutable ledger offering guaranteed non-repudiation to low-power clients without use of public key *** novelty of the situation is in the fact that every PLS client has to obtain a proof of absence in all blocks of the chain to which its counterparty does not contribute,and we show that it is possible without traversing the block’s Merkle *** obtain weight statistics of a leaf path on a sparse Merkle tree theoretically,as our ground *** the theory we quantify the communication cost of a client interacting with the *** show that large savings can be achieved by providing a bitmap index of the tree compressed using Tunstall’s *** further show that even in the case of correlated access,as in two IoT devices posting messages for each other in consecutive blocks,it is possible to prevent compression degradation by re-randomising the IDs using a pseudorandom bijective *** propose a low-cost function of this kind and evaluate its quality by simulation,using the avalanche criterion.

关键词： PLS blockchain Guy Fawkes protocol Content-addressable storage Data-structure statistics Tunstall coding Pseudorandom bijections

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