A Lightweight Privacy-Preserving Solution for IoT: The Case of E-Health

E-health, as an IoT application, promises to improve the human daily life. It collects periodically biomedical data through intelligent sensors and transmits it for remote medical diagnostics. Due to the importance of exchanged medical data, privacy preserving is a huge issue. To this aim, several solutions were proposed. However, either they cannot provide a high level of privacy, or they incur an important overhead. Motivated by this observation, we introduce a privacy preserving E-health system including a novel cryptographic scheme called PKE-IBE. The proposed cryptographic scheme is based on Identity-Based Cryptography (IBC). It tackles the key escrow issue and ensures blind partial private key generation. A chosen ciphertext security variant is also introduced. Our detailed security and performance analysis reveals that our proposal not only overcomes various known attacks but also is efficient in comparison to existing approaches.