"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

“Consider the use of smart cards ... for especially critical functions.  Although more costly than software, when properly implemented the assurance gain is great.  The form-factor is not as important as the existence of an isolated processor and address space for assured operations – an ‘Island of Security,’ if you will.  Such devices can communicate with each other through secure protocols and provide a web of security connecting secure nodes located across a sea of insecurity in the global net.”

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

"Unfortunately, the security issues of a technology near the end of its lifetime are typically overlooked.  The best known example is that of cryptographic keys and algorithms which may need to offer in some cases security for 50 to 100 years."