Hybrid Key Generation for Securing the Sensor Cloud

Abstract

Sensor devices are susceptible to a variety of attacks including the black hole, wormhole and denial of service attacks. These kinds of attacks extract the most confidential information which is exchanged between the devices. First, to make sensor networks economically viable, sensor devices are limited in their energy, computation, and communication capabilities. Second, unlike traditional networks, sensor nodes are often deployed in accessible areas, presenting the added risk of physical attack. And third, sensor networks interact closely with their physical environments and with people, posing new security problems. When setting up a sensor network, one of the first requirements is to establish cryptographic keys for later use. Cryptography entails a performance cost for extra computation that often increases packet size. Cryptographic hardware support increases efficiency but also increases the financial cost of implementing a network. Many types of attack are executed by taking the node identity as input parameter. By taking the advantage of hiding the identity information from the packet is lead to protect and prevent the malicious attacks during communication. Identity-based encryption is a public-key encryption in which the public-key of a user can be set as an identity-string of the user. There is a private key generator (PKG) in IBE which holds a master-secret key, and issues a secret key to each user with respect to the user identity. During data access, for both uploading and downloading process shared key is used to protect the data. The performance evaluation shows that the proposed Hybrid Key Generation System (HKGS) for securing the WSN achieves the best performance compare to the existing Secured Group Communication Using ECC (SGCUE) in terms of the packet delivery ratio, Transmission Delay, Throughput, Control Overhead, Normalized Overhead, Goodput and Jitter.