Attribute-based Searchable Encryption with Policy Hidden in Edge Computing

Edge computing bring storage, computing, processing, and networking closer to the devices that generate or consume data than traditional models based entirely on the cloud, which is a set of edge computing technologies. Edge nodes take on some of the encryption and decryption work for users, reducing the network latency and computational burden on lightweight end devices to a certain extent. Attribute-based encryption algorithm combined with searchable encryption algorithm, which achieve the flexible access and search to encrypted data. Access policies are usually published in plain text, which can cause leakage of user information and data privacy. Traditional single-keyword search generates massive data that is irrelevant to the search results. An attribute-based searchable encryption scheme with policy hiding in edge computing is proposed to access and retrieve encrypted data through attributes and keywords, with the edge nodes sharing the computational burden of data users. We utilize a novel approach to anonymize access policies and protect attribute privacy information from disclosure. Our scheme is proven resistant to Chosen Plaintext Attack (CPA) and Chosen Keyword Attack (CKA).