Jancic, Ana and Warren, Matthew 2003, Quantum cryptography - one step closer to reality, in Proceedings 4th Australian Information Warfare and IT Security Conference : Enhancing trust, [University of South Australia], [Adelaide, SA], pp. 181-189.
Most of cryptographic techniques today provide secure enough communications in society. However, none of them can provide unconditional security (except One-Time pad, which is the only such mechanism). They all have weaknesses. That is why they should be consistently updated and renovated along with changes in technology.
However, the quantum computers have potential to completely revolutionize cryptography. They would be so powerful that all complex computations and mathematical problems on which current cryptography rely, would become trivial. They would be able to solve them in a matter of seconds. At the same time quantum cryptography would offer perfectly secure communication.
This paper is brief introduction to quantum computing, quantum cryptography, and to existing quantum technology.
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