Authentication thwarts unauthorized users from accessing resources from insecure network environments. Secret keys can be generated and shared between two wireless nodes by measuring and encoding radio channel characteristics without ever revealing the secret key to an eavesdropper at a third location. This project addresses bit extraction,i.e.,the extraction of secret key bits from noisy radio channel measurements at two nodes such that the two secret keys reliably agree. Problems include non-simultaneous directional measurements,correlated bit streams,and low bit rate of secret key generation. Based on cryptographic techniques,several password authentication schemes have previously been implemented. But the mutual authentication should be needed to authenticate the clients. For that purpose,in this paper a secure remote clients mutual authentication scheme using shared secret key generation and that schemes achieves all security requirements by using the Symmetric key algorithm has been proposed. © 2016,International Journal of Pharmacy and Technology. All rights reserved.