Secure Transmission in Ad-hoc Network: Using Combined Cryptography

every time while transferring or broadcasting data to the remote group of wireless ad-hoc network (Mobile ad-hoc node) problem is occurred. The major challenges that are available in the existing system are, the overcome the problem of more communication required between sender and receiver, second is unavailability of fully trusted key server in cryptography system. The existing cryptography technique is not able to or cannot be deal with this problem. Here we are using new cryptography technique to achieve above goals, which is combination of traditional encryption techniques. Using this technique a members in group maintain public and secret keys. A remote sender can obtain a public key of receivers from key server for encryption and securely broadcast encrypted shared secret key to the intended member in group using combined encryption technique. On receiving, receiver uses its own secret key to decrypt shared secret decryption key