DLCP: A protocol for securing light client operation in blockchains

Costa, Leonardo da; Neto, André Silva; Pinheiro, Billy; Araújo, Roberto; Abelém, Antônio; Cordeiro, Weverton

doi:10.1109/noms.2018.8406309

Cited by 6 publications

(2 citation statements)

References 5 publications

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“…Aggelos Kiayias et al produces proofs of work with a sublinear complexity in the length of the chain, and thus enables SPV to be performed much more efficiently [ 25 ] . Leonardo da Costa et al proposes a verification method based on the threshold cryptosystem [ 26 ] , which greatly reduced the communication overhead of light clients. However, this method relies on Online certification authorities (OCAs) to manage public keys, so it undermines the decentralization of blockchains.…”

Section: Related Workmentioning

confidence: 99%

LOPE: A Low‐Overhead Payment Verification Method for Blockchains

Zhang

Jia

et al. 2021

Chinese J of Electronics

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With its characteristics of decentralization, security, data traceability, and tamper‐resistance, the blockchain has been widely used in various domains. Considering the difference in the performance of the devices, the light client is proposed so that devices without the ability to store a full blockchain copy can also participate in the blockchain transactions. However, the light client has to communicate with full nodes and verify the authenticity of a transaction which brings in some extent of communication, computation, and storage overheads to the light client. These overheads cannot be ignored for some low‐performance devices, such as embedded devices or IoT chips, and therefore the current light client scheme does not work in this situation. We propose LOPE (a Low‐overhead payment vErification method) for poor‐capacity nodes in the blockchain system. In LOPE, a grouping protocol is designed to partition full nodes into groups to serve the verification requests of the light client. In addition, Practical byzantine fault tolerance (PBFT) is used to ensure the light client to get a credible result in spite of a few dishonest nodes existing in the group. We conduct LOPE and evaluate it in a testbed. The experiment results show that LOPE reduces more than half of the communication overhead, degrades the computation overhead of the light client to a large extent, and avoids the storage overhead of the hash roots of block headers in the light client. We also conduct theoretical analysis to show the performance improvement and security issues of LOPE.

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Section: Related Workmentioning

confidence: 99%

LOPE: A Low‐Overhead Payment Verification Method for Blockchains

Zhang

Jia

et al. 2021

Chinese J of Electronics

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show abstract

“…To address the security risk above and provide fast transaction verification, in a previous work, we introduced Distributed Lightweight Client Protocol (DLCP), a protocol that enables LCs to encrypt a blockchain request (related to block headers and pending transactions) only once and send the resulting message to a group of FNs. As a majority of FNs responds to the LC with a single message, the client obtains a response without the need for multiple individual queries to several FNs.…”

Section: Introductionmentioning

confidence: 99%

Securing light clients in blockchain with DLCP

Costa¹,

Neto²,

Pinheiro³

et al. 2018

Int J Network Mgmt

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In blockchain, full nodes (FNs) are peers that store and verify entire chains of transactions. In contrast, light clients (LCs) are those with limited resources, and for this reason, they request only block headers from FNs for transaction verification-using protocols like Simple Payment Verification (SPV). In an approach to prevent FN tampering on transaction verification (byzantine fault), LCs request block headers from multiple FNs and compare received responses. One problem with this approach is that an LC must connect to each FN and perform the same cryptographic operations with each one repeatedly, which leads to client-side complexity and slower response. We propose an alternate approach to tackle this issue, in which LCs can encrypt a request for block headers only once, and send that request to a predetermined set of FNs to access, process, and reply back in a single response. Our approach, called Distributed Lightweight Client Protocol (DLCP), enables LCs to verify with little effort if FNs have agreed on a response. From an experimental evaluation, we observed that DLCP provided lower latency and reduced computing and communication overhead in comparison with the existing conventional approach.Int J Network Mgmt. 2019;29:e2055.wileyonlinelibrary.com/journal/nem

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Energy trading scheme based on consortium blockchain and game theory

Chen

et al. 2023

Computer Standards & Interfaces

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DLCP: A protocol for securing light client operation in blockchains

Cited by 6 publications

References 5 publications

LOPE: A Low‐Overhead Payment Verification Method for Blockchains

LOPE: A Low‐Overhead Payment Verification Method for Blockchains

Securing light clients in blockchain with DLCP

Energy trading scheme based on consortium blockchain and game theory

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