Enhanced Security Mechanism in public key Cryptosystems using Biometric person Authentication

Security has been a major concern for authentication over networking. Cryptography methods solve the problem of security by various public key cryptosystems method. In public key cryptosystems, authentication provides by either HASH function, MAC (Message Authentication Code) function or Digital Signature. In this work, we are using Biometric based person or sender Authentication using Speech Feature in public key Cryptosystem. Here using public key cryptosystem is Diffie Hellman (DH) algorithm. DH generates a shared secrete key between two parties over insecure communication but DH does not provide Encryption/Decryption and authentication. Man in middle attack or Hacking possible in DH because it does not authenticate the participate. In this work we overcome the authentication and man in middle attack problem by using Biometric based sender authentication. Also the speech encryption and decryption are performing with the message in this work for higher security.