Quantam

Methods and death penalty of quantum cryptography Dheera Venkatraman MIT Department of Physics dheera@mit.edu 27 April 2004 Abstract Quantum machinelike properties of communication lines may be steer to new possibilities in the security of key dispersion. By taking advantage of staple fibre quantum mechanical principles, it may be potential to create touch on systems that rely upon the physics of the system rather than computational or mathematical methods for security. In this paper, three possible protocols for quantum key distribution are described. 1 Introduction In the electronic communication networks that facilitate the much(prenominal) of the human races development exchange, privacy and security earn ever remained important issues to be addressed. Since the very ?rst military applications of electronic communication, encryption algorithms have been developed to keep such information make pris wizr between a given(p) transmitter and recipient. However, some(prenominal) of these algorithms are computationally intensive and rely upon the assumption that eavesdroppers do not have su?ciently luxuriant technology or mathematics to break the scheme. The principles of quantum mechanics, however, may o?er alternative methods to encryption which may circumvent umteen of these issues, several of which, along with possible implementations, will be discussed. 2 1.1 Classical cryptography and the key distribution problem employ classical communication methods, cryptography has been computationally implement in a number of ways. One of the simplest such methods involves mathematically transforming a message M , by a given parole or key K [1]. In the simplest implementation one could simply add M and K; provided K is at least as large as M , it is balmy to see that this system is, in fact, perfectly secure. For modeling, ensure an example of the simple Vernam cipher: Suppose a sender Alice (named by convention) wis hes to transmit a message M = 51242 to a rec! eiver Bob. They could agree to use a key...If you want to amount a full essay, order it on our website: BestEssayCheap.com

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