NSA: We 'don't know when or even if' a quantum computer will ever be able to break today's public-key encryption

America's National Security Agency has published an FAQ about quantum cryptography, saying it does not know "when or even if" a quantum computer will ever exist to "exploit" public-key cryptography. In the document, titled Quantum Computing and Post-Quantum Cryptography, the NSA said it "has to produce requirements today for systems that will be used for many decades in the future."

Continue reading...