15,207 research outputs found
Upper bounds of a class of imperfect quantum sealing protocols
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 , and reading the bit
can be detected with the probability , the upper bounds are and .Comment: 5 pages, 1 figure. Add an example on how to break the majority voting
schem
Comment on "Unconditionally secure commitment in position-based quantum cryptography"
We show that a recently proposed relativistic commitment scheme [Sci. Rep. 4,
6774 (2014). arXiv:1406.6679] is insecure against the cheating of the
committer.Comment: 1 pag
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