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• W4313181981 abstract "The advent of group-oriented communication applications has triggered research on secure group communication (SGC) in vehicular ad hoc networks (VANETs). Given this, some researchers worked in this area and proposed various schemes. However, these systems lacking the dynamic nature, and struggling with larger processing loads, enormous storage, increased communications, security, and privacy concerns. Further, with the increase in the size of VANET, it is challenging to manage processing loads and storage requirements of group controller (GC)-centric group key agreement (GKA). To address these drawbacks in existing VANET communications, we propose a blockchain IOTA sharding-based smart contract-centric GKA for SGC in large VANETs. In this scheme, we partition the main network into <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>${r}$ </tex-math></inline-formula> sharded subnetworks using blockchain sharding technique, with <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$G_{1}, G_{2}, G_{3},ldots, G_{r}$ </tex-math></inline-formula> as smart contract (SC) instances generated by GC, G, which functions as Sub-GC (Sub-GC) to their respective shards. Under the Elliptic curve decision Diffie–Hellman (ECDDH) and group-Elliptic curve Diffie-Hellman (GECCDH) assumptions, the proposed protocol is proven to be secure. The suggested protocol outperforms the other protocols for secure communication in large VANETs, according to the performance analysis." @default.
• W4313181981 created "2023-01-06" @default.
• W4313181981 creator A5004144325 @default.
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• W4313181981 date "2023-03-15" @default.
• W4313181981 modified "2023-09-26" @default.
• W4313181981 title "Blockchain IOTA Sharding-Based Scalable Secure Group Communication in Large VANETs" @default.
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• W4313181981 doi "https://doi.org/10.1109/jiot.2022.3222382" @default.
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