Enhancement of Quantum Secret Sharing Using Exclusive-OR and Shift Operation

We propose quantum secret sharing scheme that emphasizes on the cooperation (twice) of communicating parties to avoid untrustworthy members and improves the strength of the key. The proposed scheme is a new approach in quantum secret sharing in which cooperation of the parties is emphasized at the same time the key is strengthened by performing a shift operation on the received partial keys. In this method, we have managed to achieve the following: security of the key is significantly enhanced; cooperation between parties is also increased (to two) and improved. This method shows that it is difficult for an eavesdropper to obtain the key easily. It is also hard for the communicating parties to cheat since key verification is done twice and if any member cheats, it can easily be identified and communication can be aborted immediately.