Controlled Secret Sharing Protocol using a Quantum Cloning Circuit
  We demonstrate the possibility of controlling the success probability of a secret sharing protocol using a quantum cloning circuit. The cloning circuit is used to clone the qubits containing the encoded information and {\em en route} to the intended receipients. The success probability of the protocol depends on the cloning parameters used to clone the qubits. We also establish a relation between the concurrence of initially prepared state, entanglement of the mixed state received by the receivers after cloning scheme and the cloning parameters of cloning machine. 
Satyabrata Adhikari, Sovik Roy, Shantanav Chakraborty, V. Jagadish, M.   K. Haris, Atul Kumar
quant-ph