"One should not assume that stakeholders do not care about their security merely because they do not understand the consequences of certain actions. The perception of risk can vary significantly from actual risk and, in the short term, convenience may lead some early adopters to make hazardous decisions."

“New concepts for quantum computer implementations, algorithms, and advances in the theoretical understanding of the physics requirements for quantum computers appear almost weekly in the scientific literature.”

ARDA, Report of the Quantum Information Science and Technology Experts Panel

“So the threat to cryptography is well understood due to work by Peter Shor and others. A symmetric algorithm like AES or others standard crypto processes is cut (of) key-size in half, which is a dramatic reduction. ... For key management purposes, against the RSA and the Diffie-Hellman and stuff, they flat-line under a quantum computer.”

Brian Snow, Former Technical Director of the US National Security Agency (NSA), Public Key Cryptography 30th Anniversary Conference, Dec 2006