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10、密码学的理论意义——10. THEORETICAL IMPORTANCE OF CRYPTOGRAPHY
Quantum cryptography has its own greater importance in the theoretical field which is explained as follows.
Fundamental concepts of classical cryptography, and the corresponding laws and limitations, have turned out to be of the key importance for foundation of classical information processing - informatics.
Fundamental concepts of quantum cryptography, and the corresponding laws and limitations, are expected to be of the key importance for foundation of quantum information processing and also informatics and (quantum) physics.

11、量子密码学的应用——11. APPLICATIONS OF QUANTUM CRYPTOGRAPHY
Quantum cryptography systems are already used by some government agencies, large banks, telecommunications companies and other corporations who handle sensitive or military data. Commercial quantum cryptographic systems are available from a range of companies including MagiQ, id Quantique and NEC.

12、密码学存在的主要问题和领域——12. MAIN PROBLEMS/AREAS OF CRYPTOGRAPHY
The areas in which quantum cryptography has faced a lot of problems are as follows. These problems made difficult to exist but still has greater achievements in the co-existing world.

Steganography and watermarking.
Secret-key cryptography.
Secret-key distribution/generation.
Public-key cryptography (RSA Elliptic curves cryptography, McEllice cryptosystem).
Digital signatures.
Authentication.
Anonymity.
Privacy.

结论和前景——CONCLUSION AND FUTURE SCOPE

Quantum cryptography promises to revolutionize secure communication by providing security based on the fundamental laws of physics, instead of the current state of mathematical algorithms or computing technology. The devices for implementing such methods exist and the performance of demonstration systems is being continuously improved. Within the next few years, if not months, such systems could start encrypting some of the most valuable secrets of government and industry. Future developments will focus on faster photon detectors, a major factor limiting the development of practical systems for widespread commercial use. The ultimate goal is to make QKD more reliable, integrate it with today's telecommunications infrastructure, and increase the transmission distance and rate of key generation. Thus the Long-term goals of quantum key distribution are the realistic implementation via fibers, for example, for different buildings of a bank or company, and free space key exchange via satellites. Quantum cryptography already provides the most advanced technology of quantum information science, and is on the way to achieve the (quantum) jump from university laboratories to the real world.

鸣谢——ACKNOWLEDGEMENT

I thank GODalmighty for guiding me throughout the term paper. I would like to thank all those who have contributed to the completion of the term paper and helped me with valuable suggestions for improvement. I am extremely grateful to Mr.DHANANJAY DEVANGAN, Department of ELECTRONICS AND COMMUNICATIONS,for providing me with best facilities and atmosphere for the creative work guida本论文由英语论文网提供整理，提供论文代写，英语论文代写，代写论文，代写英语论文，代写留学生论文，代写英文论文，留学生论文代写相关核心关键词搜索。