On: Successful Attack Against a Quantum Cryptography System

[recampbell]

So it sounds like Quantum cryptography is only useful for data being transmitted between two points, and would not apply to data at rest? Or is this a false distinction?

[sp332 → recampbell]

Yeah, that's true. It depends on entanglement of particles (or photons in this case, which are definitely never at rest!), which is hard to maintain for more than a fraction of a second.

Edit: If they ever get this working that might change! http://www.physorg.com/news196613216.html