A Pairing-Free Certificateless Searchable Public Key Encryption Scheme for Industrial Internet of Things

The Industrial Internet of Things (IIoT) collects a large amount data through various types sensors and intelligently processes this using cloud computing, which is flexible, efficient, cost-effective. Since IIoT stored on the service provider’s server, must be encrypted to protect user’s privacy. However, faces search problem, usually solved by Public Key Encryption with Keyword Search (PEKS). In addition, most existing PEKS schemes are vulnerable Inside Guessing Attacks (IKGA). Recently, some certificateless public key authenticated encryption keyword (CLPEKS) have been proposed, not only avoid problems certificate management escrow but can also resist IKGA. them rely expensive bilinear pairing. To overcome these problems, in paper we propose pairing-free CLPEKS scheme. security proposed scheme proved random oracle model. analysis results show that has better overall performance terms computational cost, communication cost properties.