Secured communication through Secret Key Extraction using RRM

Abstract — Secure wireless communications typically rely on secret keys, which are difficult to establish in an ad hoc network without a key management infrastructure. The channel reciprocity and spatial decorrelation properties can be used to extract secret key, especially in a Rayleigh fading channel. But the intervention of intermediate objects between the communication nodes reduces the strength of the secret key generated through such methods. Furthermore, the impact of small fluctuations also reduces the bit matching rate of such key agreement methods. This paper is based on the survey conducted on secret key generation from Received Signal Strength (RSS). By considering uniqueness property of RSS as base, various authors have proposed different methods for secret key extraction. Due to use of RSS for key extraction the existing systems suffer from predictable filter response at random period. The existing system also faces signal fading and drop in RSS because of intermediate object. Basic idea of this paper is to provide a new secret key generation scheme to improve the data security. The core objective is to generate a unique key which can provide data confidentiality and improve the strength of extracted key. Secret key generation using Received Request Message (RRM) scheme can be used to achieve the objective. The secret key extracted from this method using request message consists of source and destination IP, port and user request along with random number will provide high entropy data bits to ensure strength of the key and can attain data confidentiality