• "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

  • "My colleagues at MIT and I have been building simple quantum computers and executing quantum algorithms since 1996, as have other scientists around the world. Quantum computers work as promised. If they can be scaled up, to thousands or tens of thousands of qubits from their current size of a dozen or so, watch out!

    Prof Seth Lloyd of MIT, MIT Review 2008

  • “When will we be secure? Nobody knows for sure – but it cannot happen before commercial security products and services possess not only enough functionality to satisfy customers’ stated needs, but also sufficient assurance of quality, reliability, safety, and appropriateness for use. Such assurances are lacking in most of today’s commercial security products and services.”

    Brian Snow, Former Technical Director of the US National Security Agency (NSA), "We need Assurance", 2005

  • “Business now relies on information infrastructures that are interlinked and interdependent… The way in which these hidden interdependencies pervade our everyday lives is staggering and, in some cases, may go unchecked for many years until an incident occurs that revels the true nature of the interdependences' impact.”

    The British Government’s Technology Strategy Board, 2008
  • “Assurance is best addressed during the initial design and engineering of security systems, NOT as an after market patch. The earlier you include a security architect in your design process, the greater the likely hood of a successful and robust design. As the quip goes, he who gets to the (module) interface first wins.”

    Brian Snow, Former Technical Director of the US National Security Agency (NSA), "We need Assurance", AusCERT 2008

  • "First and foremost, there is no proper excuse for continued use of a broken cryptographic primitive (MD5) when sufficiently strong alternatives are readily available, for example SHA-2. Secondly, there is no substitute for security awareness." ... "Advice from experts should be taken seriously and early in the process. In this case, MD5 should have been phased out soon after 2004."

    Alexander Sotirov, Marc Stevens, Jacob Appelbaum, Arjen Lenstra, David Molnar, Dag Arne Osvik, Benne de Wegerr, "MD5 considered harmful today - Creating a rogue CA certificate", December 2008
  • “The time needed to factor an RSA integer is the same order as the time needed to use that same integer as modulus for a single RSA encryption.   In other words, it takes no more time to break RSA on a quantum computer (up to a multiplicative constant) than to use it legitimately on a classical computer.”

    Professor Gilles Brassard,  "Quantum Information Processing: The Good, the Bad and the Ugly", 1997

  • "Even a relatively small quantum computer, one that had a few tens of thousands of qubits, could consider so many different values at once that it would be able to break all known [ed: RSA, D&H, ECC, AES-128] codes commonly used for secure Internet communication.”

    Prof Seth Lloyd of MIT, MIT Review 2008

  • "Given their power to intercept and disrupt secret communications, it is not surprising that quantum computers have the attention of various U.S. government agencies.  The National Security Agency, which supports research in quantum computing, candidly declares that given its interest in keeping U.S. government communications secure, it is loath to see quantum computers built. On the other hand, if they can be built, then it wants to have the first one.”

    Prof Seth Lloyd of MIT, MIT Review 2008

  • "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
  • In the next five years we will counter many 'hacker' attacks but we will not be safe from Nation States and other large entities

    Brian Snow, Former Technical Director of the US National Security Agency (NSA), "We need assurance!", 1999-2008

Resources Expert Opinions Quantum computing

Quantum computing

This section quotes leading cryptographic and quantum computing experts on the timing, capabilities and impact of quantum computers on global security systems. These quotes are often longer and more detailed than the quotes that cycle on the right hand side of each page.

Title Filter     Display # 
# Article Title
1 quote: Johannes Buchmann, Jintai Ding, Building quantum computers since 1996
2 quote: Seth Lloyd, Building quantum computers since 1996
3 quote: ARDA, New concepts for QC appear almost weakly
4 quote: ARDA, Quantum computers is a rapidly evolving field
5 quote: ECRYPT, Breakthrough in quantum computation would spell doom
6 quote: Prof. Johannes Buchmann, Good chance large quantum computers in 20 years... This would be a nightmare for IT security if...
7 quote: Brian Snow, Public key crypto would essentially be flat-lined by quantum computing
8 quote: ECRYPT, 30 to 50 year security should take quantum computers into consideration
9 quote: ECRYPT, Recommendations made today should be assigned a rather small confidence level
10 quote: Seth Lloyd, Even a relatively small quantum computer could break all known codes
11 quote: Seth Lloyd, Given their power to intercept and disrupt
12 quote: Gilles Brasssard, Takes no more time to break RSA than to run it
13 quote: Brian Snow, Quantum computers flat-line RSA, D&H, and ...
14 quote: ARDA, Code breaking quantum computers may be a decade or two away
15 quote: SecurIST, We need to be prepared for large quantum computers
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