The Retrospective Post-Quantum Problem You Should Consider

…[A]ttention to policy regarding a post-quantum cryptography (PQC) world has been focused primarily on policy that would facilitate an infrastructural transition to quantum-resistant encryption algorithms…

…Policymakers have given little or no attention to what could be called a retrospective post-quantum problem…

…Every U.S. government agency that has sent a confidential message in the past should have at least a small effort devoted to developing plans for what that agency should do if and when particularly sensitive messages from the past are revealed in the PQC future…

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