Last August the National Security Agency declared that the algorithms it had spent a decade telling the world were the best way to lock up secret data weren’t safe anymore because of quantum computers. The catch is that no one knows how to make quantum-computer-proof encryption. The NSA can only tell companies building new systems to use certain algorithms believed to be safe from attack by a large quantum computer. But NSA still doesn't give any public answers to the question: how close we are to quantum computers that could crack cryptography? https://www.technologyreview.com/s/...ct-now-against-the-quantum-computing-threat/?