Location privacy in mobile environments using a secured anonymity server

With the advances in the growth of wireless technologies, the usage of cell phones (i.e.) mobile users and the location based services have been increasing. However the location privacy of an individual user has become the challenging problem in the location based service providers. Here we propose an Anonymity server which is enclosed within an authentication server and a security key generator. The authentication server authenticates the client and encrypts all the user data using block cipher in cipher block chaining mode and Advance Encryption standard which provides security for all the user data. Then for each encrypted data the security key generator generates a random number as a session key. The anonymity server now contacts the location based service server using the session key generated by the security key generator as user identity. Now the server is unknown of individual user data and the service information is provided to the user with location privacy through the anonymity server.