• "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

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  • “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

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  • "Today’s systems must anticipate future attacks. Any comprehensive system – whether for authenticated communications, secure data storage, or electronic commerce – is likely to remain in use for five years or more. It must be able to withstand the future: smarter attackers, more computational power, and greater incentives to subvert a widespread system. There won’t be time to upgrade it in the field."

    Bruce Schneier, "Why Cryptography Is Harder Than It Looks", 1997
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Home Resources Expert Opinions Quantum computing quote: Prof. Johannes Buchmann, Good chance large quantum computers in 20 years... This would be a nightmare for IT security if...
quote: Prof. Johannes Buchmann, Good chance large quantum computers in 20 years... This would be a nightmare for IT security if...

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
 

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