Upper bounds of a class of imperfect quantum sealing protocols

Details Upper bounds of a class of imperfect quantum sealing protocols Upper bounds of a class of imperfect quantum sealing protocols

2005-02-27

arxiv.org/abs/quant-ph/0502179v2

Phys. Rev. A 71, 054304 (2005).

Physics

Quantum Physics

5 pages, 1 figure. Add an example on how to break the majority voting scheme

Scientific paper

10.1103/PhysRevA.71.054304

The model of the quantum protocols sealing a classical bit is studied. It is
shown that there exist upper bounds on its security. For any protocol where the
bit can be read correctly with the probability $\alpha $, and reading the bit
can be detected with the probability $\beta $, the upper bounds are $% \beta
\leqslant 1/2$ and $\alpha +\beta \leqslant 9/8$.

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