Has quantum cryptography been proven secure?

Tassos Nakassis, J. C. Bienfang, P. Johnson, A. Mink, D. Rogers, X. Tang, C. J. Williams, Eric J. Donkor, Andrew R. Pirich, Howard E. Brandt
2006 Quantum Information and Computation IV  
Quantum cryptography asserts that shared secrets can be established over public channels in such a way that the total information of an eavesdropper can be made arbitrarily small with probability arbitrarily close to 1. As we will show below, the current state of affairs, especially as it pertains to engineering issues, leaves something to be desired.
doi:10.1117/12.665086 fatcat:xmf3o6d24ffbfozcf3rhhepcua