Vehicular social networks (VSNs) demand secure and efficient data sharing while preserving user privacy. However, existing searchable-encryption–based solutions rely on centralized infrastructures and suffer from high computation overhead, interaction dependency, and unverifiable results. To address these limitations, we propose V $^{2}$ Share, a blockchain-based framework that enables decentralized, privacy-preserving, and verifiable vehicular data sharing, while satisfying forward-and-Type-II-backward security. V $^{2}$ Share introduces: (1) an authorization-based on-chain access control method using lightweight deterministic hashing to hide access policies; (2) a time synchronization-based non-interactive search-token generation strategy achieving forward/backward-secure queries without owner–user interactions; and (3) a multiset hash-based lightweight result verification mechanism that ensures result integrity with minimal overhead. Security analysis proves confidentiality and verifiability, while Ethereum-based experiments demonstrate that V $^{2}$ Share significantly reduces computation, storage, and communication costs compared with existing solutions.

Cloud computing is an essential technique to provide item traceability for industrial internet of things (IIoT) systems by providing item data sharing services. However, a malicious cloud server may prevent industrial participants from acquiring accurate traceability of items by providing inconsistent item data. To fix this issue, we propose Acics, an item data consistency auditing scheme in untrusted cloud services for cloud-aided IIoT systems. Acics presents two variants named S-Acics and L-Acics. S-Acics enables industrial participants to audit item data consistency for each item and circularly play the auditing role. L-Acics further enables industrial participants to audit item data consistency for a sampled subset of items while resisting data selection attack via a new separated storage mechanism. Finally, Acics integrates a fair payment mechanism built on smart contract to incentivize the cloud server to provide consistent item data access service for industrial participants. The experiment results show that our solution can audit item data consistency with reasonable cost.