Quantum Cryptography

Nuno Crato

Li Fan

At the time when man enter the Information Age in the twenty-first century,how could we guarantee that the communications systems can't be decrypted? In this respect,quantum cryptography has made great progress.By analyzing the development of cryptography both scientifically and philosophically from the non-quantum cryptography phase to the quantum cryptography phase,we conclude that the ancient cryptography is of weak uncrackability,and when it developed into the stage of the classical cryptography its theory and practice take on the strong-uncrackability,while the quantum cryptography tends to be uncrakable,and it is gradually becoming imperatively uncrakable.

Christian Monyk

HE Xiang-chu

This paper first gives a brief introduction of quantum cryptography and several principal quantum effects involved by quantum key; then it describes in detail the development history of quantum cryptography at home, gives some topics in the research of quantum cryptography, including quantum key distribution, quantum signature, quantum identity authentication, quantum encryption, quantum secret-sharing, and their brief descriptions, and analyzes in depth some hindering factors in practical quantum cryptography; finally, the development of quantum cryptography is forecasted.

JIANG ZHU, Tao Yan, Hua Zhao

Quantum cryptography based on quantum physics has been proved to be an effective means of key security allocation in secure communication. This paper introduces you to the basic principle of quantum cryptography on the basis of classical cryptography, and then presents several methods of quantum cryptography. It expounds the main research on EPR key distribution mechanism based on entanglement, according to quantum cryptography communication history and the existing problems. Lastly the advanced prospect and research aspect were predicted.

Josef Stráský