Titlebook: Applied Quantum Cryptography; Christian Kollmitzer,Mario Pivk Book 2010 Springer-Verlag Berlin Heidelberg 2010 Coding and information.Cryp

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Book 2010ementary technologies that are necessary to create a tech- cal solution: electronics, software, and network components were added within the project SECOQC (Development of a Global Network for Secure Communication based on Quantum Cryptography) that teamed up all expertise on European level to get a technology for future cryptography.

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Introduction,experiments used optical fibers; others were based on free space technologies. But beyond that it is now possible to build communication networks based on QKD. Thus, not only Peer to Peer connection has to be used but it is now possible to build modern communication structures.

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Adaptive Cascade,om nothing, rather it is a method of key expansion. The remarkable feature of quantum cryptography is its ability to detect eavesdropping by the incident of an unnaturally high quantum bit error rate. On the other hand, it has no defense against person-in-the-middle attacks by itself, which is why authentication is of crucial importance.

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Quantum-Cryptographic Networks from a Prototype to the Citizen,tum cryptography, a technology has been developed within the last decade that is provably secure against arbitrary computing power, and even against quantum computer attacks. When becoming operational, quantum cryptography will raise communication security to an essentially higher level.

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Introduction,ssibility to exchange information in a provable secure way is a milestone in communication history. The main problem in QKD is the range limitation between the communication partners Alice and Bob. Several experiments have shown that the distance between Alice and Bob can be enhanced. Some of these

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Quantum Key Distribution,hannel. The protocol described here is the BB84 protocol, named after Bennett and Brassard [5]. There are other protocols like the B92 protocol [3], the six-state protocol [8], the SARG protocol [19] and the Ekert protocol [10], which are not discussed here. We are focusing on BB84, the most known Q

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