Parallel Key-Insulated Multiuser Searchable Encryption for Industrial Internet of Things

With the rapid development of industrial Internet Things (IIoT) and cloud computing, an increasing number companies outsource their data to servers save costs. To protect privacy, sensitive must be encrypted before being outsourced servers. A multiuser searchable encryption (MUSE) scheme was introduced ensure high efficiency retrieval. In IIoT system with numerous users, existing MUSE schemes suffer from certain key exposure problems owing limited protection smart devices frequent queries by users. this article, we propose a parallel key-insulated for IIoT. This utilizes broadcast technology implement MUSE. addition, our introduces primitive improve tolerance exposure. The security is proved in random oracle model. experimental results show that achieves computational efficiency.