A New and Feasible Protocol for Semi-quantum Key Distribution

Quantum Key Distribution (QKD) protocols make it possible for two quantum parties to generate a secret shared key. Semi-quantum Key Distribution (SQKD) protocols, such as “QKD with classical Bob” and “QKD with classical Alice” (that have both been proven robust), achieve this goal even if one of the parties is classical. However, the currently existing SQKD protocols are not experimentally feasible with the current technology. Here we suggest a new protocol (“Classical Alice with a controllable mirror”) that can be experimentally implemented with the current technology, and prove it to be robust. 2 Michel Boyer, Matty Katz, Rotem Liss, and Tal Mor