"One often hears recommendations for key-sizes of public-key cryptosystems needed to obtain security for 30 years and even 50 years. Anyone wanting a real security of this magnitude should probably take the construction of the quantum computer into consideration."

ECRYPT, “D.PROVI.3 – First Summary Report on Unconditionally Secure Protocols”, January 2005

"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."

"There is a good chance that large quantum computers can be built within the next 20 years.  This would be a nightmare for IT security if there are no fully developed, implemented, and standardized post-quantum signature schemes."

Prof. Johannes Buchmann, et al, “Post-Quantum Signatures”, Oct 2004, Technische Universität Darmstadt