Fully Homomorphic Secure Internet of Things Framework Over Untrusted Cloud
Leveraging the cloud support has proven critical and pivotal in storing/managing the data being generated at an exponential rate by Internet of Things (IoT) devices. The data sensed by IoT devices is private mostly and needs to be protected from unauthorized users during its transit where symmetric/ asymmetric cryptography like RSA, AES work well. However, these cryptosystems fail as they need to access plaintext for performing data analytics thus revealing data to cloud owners. The proposed model mitigates this concern by employing fully homomorphic encryption (FHE) for enciphering of data collected from the sensor for privacy preserving and providing confidentiality services before sending it to the cloud for analytics. FHE allows direct computation on encrypted data. Moreover, the model performs error detection / correction using Reed Solomon Codes (RS Codes) at edge/fog nodes and at cloud also as an additional security measure keeping in mind the sensitivity of the data obtained for IoT system. It is a unique model combining power of FHE and RS codes for IoT objects.