> Quantum computers ... do not exist How can you be so sure? What if a nation state invents one and treats it as a Manhattan Project style secret? > Whether p

> Quantum computers ... do not exist How can you be so sure? What if a nation state invents one and treats it as a Manhattan Project style secret? > Whether post-quantum crypto exists today or not doesn't matter Unless the first "Quantum computers that can break traditional crypto" are invented and announced tonight... then it matters about the current state of post-quantum crypto.