SecGraph: Towards SGX-based Efficient and Confidentiality-Preserving Graph Search

• URL: http://arxiv.org/abs/2403.19531v1
• Date: Thu, 28 Mar 2024 16:06:13 GMT
• Title: SecGraph: Towards SGX-based Efficient and Confidentiality-Preserving Graph Search
• Authors: Qiuhao Wang, Xu Yang, Saiyu Qi, Yong Qi,
• Abstract summary: We propose an SGX-based efficient and confidentiality-preserving graph search scheme SecGraph. We show that SecGraph yields up to 208x improvement in search time compared with PeGraph.
• Score: 13.00839243715644
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Graphs have more expressive power and are widely researched in various search demand scenarios, compared with traditional relational and XML models. Today, many graph search services have been deployed on a third-party server, which can alleviate users from the burdens of maintaining large-scale graphs and huge computation costs. Nevertheless, outsourcing graph search services to the third-party server may invade users' privacy. PeGraph was recently proposed to achieve the encrypted search over the social graph. The main idea of PeGraph is to maintain two data structures XSet and TSet motivated by the OXT technology to support encrypted conductive search. However, PeGraph still has some limitations. First, PeGraph suffers from high communication and computation costs in search operations. Second, PeGraph cannot support encrypted search over dynamic graphs. In this paper, we propose an SGX-based efficient and confidentiality-preserving graph search scheme SecGraph that can support insertion and deletion operations. We first design a new proxy-token generation method to reduce the communication cost. Then, we design an LDCF-encoded XSet based on the Logarithmic Dynamic Cuckoo Filter to reduce the computation cost. Finally, we design a new dynamic version of TSet named Twin-TSet to enable encrypted search over dynamic graphs. We have demonstrated the confidentiality preservation property of SecGraph through rigorous security analysis. Experiment results show that SecGraph yields up to 208x improvement in search time compared with PeGraph and the communication cost in PeGraph is up to 540x larger than that in SecGraph.

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