Applied Quantum Cryptography

  • Christian Kollmitzer
  • Mario Pivk

Part of the Lecture Notes in Physics book series (LNP, volume 797)

Table of contents

  1. Front Matter
    Pages i-xii
  2. C. Kollmitzer
    Pages 1-2
  3. M. Pivk
    Pages 3-21
  4. M. Pivk
    Pages 23-47
  5. S. Rass, C. Kollmitzer
    Pages 49-69
  6. S. Schauer
    Pages 71-95
  7. M. Suda
    Pages 97-121
  8. O. Maurhart
    Pages 151-171
  9. P. Schartner, C. Kollmitzer
    Pages 173-184
  10. C. Kollmitzer, C. Moesslacher
    Pages 185-210
  11. Back Matter
    Pages 211-214

About this book


Using the quantum properties of single photons to exchange binary keys between two partners for subsequent encryption of secret data is an absolutely novel technology. Only a few years ago quantum cryptography – or better: quantum key distribution – was the domain of basic research laboratories at universities. But during the last few years things changed. QKD left the laboratories and was picked up by more practical oriented teams that worked hard to develop a practically applicable technology out of the astonishing results of basic research.

One major milestone towards a QKD technology was a large research and development project funded by the European Commission that aimed at combining quantum physics with complementary technologies that are necessary to create a technical 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 encryption.

The practical application of QKD in a standard optical fibre network was demonstrated October 2008 in Vienna, giving a glimpse of the future of secure communication. Although many steps have still to be done in order to achieve a real mature technology, the corner stone for future secure communication is already laid.

QKD will not be the Holy Grail of security, it will not be able to solve all problems for evermore. But QKD has the potential to replace one of the weakest parts of symmetric encryption: the exchange of the key. It can be proven that the key exchange process cannot be corrupted and that keys that are generated and exchanged quantum cryptographically will be secure for ever (as long as some additional conditions are kept).

This book will show the state of the art of Quantum Cryptography and it will sketch how it can be implemented in standard communication infrastructure. The growing vulnerability of sensitive data requires new concepts and QKD will be a possible solution to overcome some of today’s limitations.


Coding and information Cryptology and information theory Data encryption Data structures Information and physics Quantum cryptography Theory and quantum computing communication cryptography information

Editors and affiliations

  • Christian Kollmitzer
    • 1
  • Mario Pivk
    • 2
  1. 1.Austrian Research Centers GmbH (ARC)WienAustria
  2. 2.ArnoldsteinAustria

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