Toward protocols for quantum-ensured privacy and secure voting

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Authors	ZIMAN Mário BUŽEK Vladimír BONANOME Marianna HILLERY Mark
Year of publication	2011
Type	Article in Periodical
Magazine / Source	Physical Review A
MU Faculty or unit	Faculty of Informatics
Citation
web	http://pra.aps.org/abstract/PRA/v84/i2/e022331
Doi	http://dx.doi.org/10.1103/PhysRevA.84.022331
Field	Informatics
Keywords	Quantum protocols; privacy; volby
Description	We present a number of schemes that use quantum mechanics to preserve privacy, in particular, we show that entangled quantum states can be useful in maintaining privacy. We further develop our original proposal [see M. Hillery, M. Ziman, V. Bužek and M. Bieliková Phys. Lett. A 349 75 (2006)] for protecting privacy in voting, and examine its security under certain types of attacks, in particular dishonest voters and external eavesdroppers. A variation of these quantum-based schemes can be used for multiparty function evaluation. We consider functions corresponding to group multiplication of N group elements, with each element chosen by a different party. We show how quantum mechanics can be useful in maintaining the privacy of the choices group elements.
Related projects:	Highly Parallel and Distributed Computing Systems