Symmetric collective attacks for the eavesdropping of symmetric quantum key distribution
arXiv:0809.0929 · doi:10.1142/S0219749908004080
Abstract
We consider the collective eavesdropping of the BB84 and six-state protocols. Since these protocols are symmetric in the eigenstates of conjugate bases, we consider collective attacks having the same kind of symmetry. We then show how these symmetric collective attacks are sufficiently strong in order to minimize the Devetak-Winter rates. In fact, it is quite easy to construct simple examples able to reach the unconditionally-secure key-rates of these protocols.
Proceeding of the conference "Noise Information and Complexity at Quantum Scale" (Erice, Italy, 2007)