One multi-receiver certificateless searchable public key encryption scheme for IoMT assisted by LLM

Abstract

The Internet of Medical Things (IoMT) has become widely adopted across the healthcare sector, offering transformative benefits. By utilizing a range of wearable medical devices and cloud servers, IoMT enables the rapid transmission of data over networks, which supports timely health monitoring and data-driven decision-making. In recent years, some applications have used the Large Language Model (LLM) to assist in diagnosis, significantly improving diagnostic efficiency in IoMT. However, secure transmission of sensitive medical information remains a key concern. To address this, we propose a multi-receiver certificateless searchable public key encryption (mCLSPE) scheme that leverages proxy re-encryption. This scheme not only addresses the inherent issues in searchable public key encryption (SPE) but also allows for more flexible addition of receivers and enhances data-sharing flexibility. The proposed scheme is proven secure in the random oracle model. The performance analysis shows that it has ideal comprehensive performance. The growth rate of communication overhead with the increase in users is significantly lower compared to other mCLSPE schemes. Finally, we design a specific IoMT assisted by LLM application scenario based on this scheme.