Abstract

Searchable Encryption (SE) provides data online search function to users while protecting the data security and the user's query privacy. It has challenges of high computational and storage overhead that should be mitigated for a practical SE system. In this paper, we propose a blockchain-based user management scheme for SE system that can decentralize bandwidth resource consumption. Meanwhile it prevents single point failure and enhances the security protection in order to prevent identity leakage, loss, tampering brought by TTP. It leverages blockchain to offer non-central dynamic user management capability. Our theoretical analysis validates the feasibility and security. Further, experiments are carried out to demonstrate the SE effectiveness.

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