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A counter-intuitive result in entanglement theory was shown in [PRL 91 037902(2003)], namely that entanglement can be distributed by sending a separablestate through a quantum channel. In this work, following an analogy between theentanglement and secret key distillation scenarios, we derive its classicalanalog: secrecy can be distributed by sending non-secret correlations through aprivate channel. This strengthens the close relation between entanglement andsecrecy.

Non-secret correlations can be used to distribute secrecy