  Quantum communication offers unique features that have no classical analog,
in particular, it enables provably secure quantum key distribution (QKD).
Despite the benefits of quantum communication are well understood within the
scientific community, the practical implementations sometimes meet with
scepticism or even resistance. In a recent publication [1], NSA claims that QKD
is inferior to "quantum-resistant" cryptography and does not recommend it for
use. Here we show that such a sceptical approach to evaluation of quantum
security is not well justified. We hope that our arguments will be helpful to
clarify the issue.
