Information vs. disturbance in dimension D
P. Oscar Boykin, Vwani Roychowdhury · Quantum Information and Computation · 2005
We show that for Eve to get information in one basis about a state, she must cause errors in \emph{all} bases that are mutually unbiased to that basis. Our result holds in any dimension. We also show that this result holds for \emph{all functions of messages} that are encrypted with a key.