Probability Based Keys Sharing for IOT Security

The Internet of Things (IoT) is composed of a vast number of connected devices, interacting among them in real-Time and high messaging volume. Such setting is in high probability to be targeted by malicious attackers. Therefore, robust security measures are required. Encryption is one of the ways to prevent the exposure of the transmitted messages and authenticate it. The main challenge of implementing encryption, is the need to frequently and securely change the encryption keys, which require constant key construction and key distribution. IoT devices have poor memory, storage, and processing bandwidth. Most of the existing security solutions cannot be implemented on them, and so leading to lack of adequate security. Allowing safe interaction between any two IoT-devices, means having a unique encryption key per conversation. This requires frequent changes of the encryption keys. To increase the availability of keys at each IoT-device, we propose an ongoing key construction process that loads the network with a common key-pool. The protocol is scalable to ensure long term security sustainability and encryption availability. The proposed protocol is based on a probability analysis that ensures the existence of a common key between any pair of IoT devices in a predefine probability which is set by the system designer. The implementation proves the feasibility of our proposed security protocol for IoT networks.