A collision proof energy efficient lightweight hybrid cryptosystem for fog

Fog computing extends cloud capabilities to the network edge, aiding IoT and users. It mitigates cloud issues like latency and reliability. However, fog's limited resources pose security vulnerabilities like data theft and unauthorised access. To tackle this, we proposed a lightweight, energy-efficient hybrid cryptosystem with dynamic key changes. This optimises fog node energy usage and the proposed security system is collision proof and uses proportional offloading to ensure the delivery of subscribed data to fog/cloud. We have utilised chosen-ciphertext attribute-based encryption scheme to produce the keys and principles of ECC-Elgamal are considered for encryption/decryption of data. Finally, the performance evaluation and security attacks analysis depicts that our security system performs better in terms of optimal energy utilisation, overall computation overhead as well as mitigating the attacks in contrast with other state of art methodologies.