A Secure Encryption Logic for Communication in Wireless Sensor Networks

This paper presents an encryption scheme suitable for direct diffusion protocols. We have calculated computational and communication overheads in terms of energy consumption using Directed Diffusion protocol. Public-key cryptography has been observed to suffer from high computational complexity and overhead. The symmetric-key schemes can be utilized more efficiently in order to provide more security. The proposed scheme overcomes the limitations of public-key and symmetric-key protocols for wireless sensor networks in respect of low energy consumption. The symmetric-key function is used to guarantee secure communications between the nodes in a network while the public-key function is used to guarantee a secure data delivery between the source to sink. This scheme provides mix of symmetric-key and public-key cryptography functions using the pre-distributed keys to implement data confidentiality service and Special attention for data authenticity.