G. Ganapathy's scientific contributions

Kerberos is an authentication protocol in which client and server can mutually authenticate to each other across an insecure network connection, to ensure data integrity of the message and privacy of channel communications. In this paper, a new novel is proposed to improve Kerberos authentication protocol by using Secret Image. This proposed modification in Kerberos will be modified to yield better security solutions and to provide centralized access control policy for each user with different parameters like authentication, speed of encryption and decryption and efficiency of transactions. This modified approach enhances the secure authentication of users with non-reputation feature by incorporating public key cryptography and hiding the message of differential access control for each user by using secret image. This differential access control policy is being enforced directly to the clients while doing the authentication of users through Kerberos protocol. The GnuPG has the capability to generate the key pair (ie, private key and public key) in the client itself. So this proposed system used this key pair for encryption and decryption of messages and takes the advantage of non transferring or non importing the private key from any devices or any nodes.