Netinfo Security ›› 2026, Vol. 26 ›› Issue (8): 1209-1223.doi: 10.3969/j.issn.1671-1122.2026.08.004

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A blockchain-sharding enabled verifiable cross-chain query scheme

Fu Zhangjie, Liu Tianyi, Song Fuyuan, Jiang Qin()   

  1. School of Computer Science, Nanjing University of Information Science and Technology, Nanjing 210044, China
  • Received:2026-01-15 Online:2026-08-10 Published:2026-09-23
  • Contact: Jiang Qin E-mail:qinj@nuist.edu.cn

Abstract:

Aiming at the problems of low efficiency of cross-chain query and complex process of verifying the integrity of cross-chain query in existing blockchains, this article proposed a verifiable cross-chain query framework for blockchain VCS-Chain. This framework designed a three-layer architecture including the storage layer, verification layer and application layer. The storage layer contained two storage forms: transaction chain and dependency chain. This article had built a verifiable inverted index on the dependency chain and adopted a centralized sharding scheme for input accounts on the transaction chain. This article had also transferred the sharding results off-chain, significantly optimizing the efficiency of data storage and querying. In the verification layer, a bidirectional hash cross-validation mechanism had been used to verify the correctness of the data on the transaction chain and ensure the reliability of the query results. Meanwhile, this article introduced the RSA cumulative hash verification algorithm, which verifies the integrity of the dependency chain query. In the application layer, VCS-Chain can perform efficient and verifiable cross-chain queries in various scenarios, enabling efficient tracking and traceability of data on the blockchain. Experimental results show that compared with the scheme Vassago, the query latency of the VCS-Chain scheme has been reduced by more than 24.43% overall in multiple datasets, and the throughput of the system is significantly improved.

Key words: blockchain query, cross-chain, sharding, query verifiability

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