No information flow using statistical fluctuations and quantum cryptography

The use of entanglement by quantum-cryptographic protocol to transfer the data was discussed. The detection of individual eavesdropping attack on each qubit was detected by the security test where the qubits provides the key, and there exists a coherent attack internal to these groups, which goes unnoticed in security tests. The result shows that the level of the individual qubits also detect the coherent attack by testing equality for the measurements. A modified test was proposed to ensure security against a coherent attack.ICG Q