SECURED KEY EXCHANGE BY INFORMATION RECONCILIATION AND PRIVACY AMPLIFICATION USING RECEIVED SIGNAL STRENGTH

P.Dharshini, S.Jayapriya, C.Sowmiya, Jesu Jayarin, Visumathi

Abstract: In order to make the communication more secure in the dynamic environment, the signal strength is used through which high entropy bit can be achieved. The received signal strength is used to find the nearest node in order to forward the data towards the destination node. In the existing system the secret key is generated only by the source and the destination nodes. In our proposed system, the secret key is generated by each and every hop. The generated key is quantized by the technique called quantization and the bit mismatch is reduced by information reconciliation technique. The bits that are lost during information reconciliation is avoided by distillation. In order to reduce the resultant output bit stream, hash key of the secret key is generated by using Privacy amplification technique. The low output bit stream result in high entropy. Here the predictable key generation is highly reduced. In this we are generating the random number to ensure data integrity and authentication. For this MNF hash function is used which is of 256 bits Privacy amplification is used to ensure that the resultant bit pattern is random. The mismatched bits can also be identified easily. Multiple sensors are involved in increasing the rate of the secret key generation. Generated bit streams are verified by randomness test. Our experiment has been implemented in 802.11A laptops

Keywords: Received Signal Strength, Quantization, Information Reconciliation, Privacy Amplification, Hash key, Secret key

DOI: https://doi.org/10.15623/ijret.2014.0319049