Identity-based searchable encryption with cryptographic reverse firewalls for IoT-based healthcare systems

A new healthcare trend is the use of the Internet of Things (IoT) to establish a system of healthcare. Doctors can monitor patients’ health and respond to sudden illnesses. However, concerns about data security are preventing widespread use. Encrypting sensitive data prior to transmission to a Healthcare Cloud Server (HCS) is a common solution. Yet, employing this method results in the incapacity to perform searches within the encrypted data. To overcome these challenges, we propose a novel Identity-Based Searchable Encryption with Cryptographic Reverse Firewalls (IB-SE-CRF). The suggested scheme offers an effective and secure approach for searching data that is encrypted in HCS. Meanwhile, the scheme resolves traditional public-key encryption with keyword search (PEKS) problems that use the Public Key Infrastructure (PKI). Furthermore, the security examination confirms that the proposed IB-SE-CRF enables resistance and prevents chosen keyword attacks (CKA), keyword guessing attacks (KGA), and algorithm substitution attacks (ASA). The performance analysis reveals that the IB-SE-CRF scheme has advantages in communication and computational costs. Therefore, our IB-SE-CRF scheme is more practical and suitable in IoT-Based Healthcare Systems environments.