Researchers at Toshiba Corp. have developed a method that they say makes it possible -- barring a change in the laws of physics -- to absolutely secure distribution of encryption keys across a network. Their system, which was unveiled at this week's Nano Tech 2007 exhibition in Tokyo, builds on quantum key distribution, which has been the subject for research and development work for some time because it promises to make possible the secure distribution of encryption keys across a network. Currently encryption keys must be sent offline, typically on physical media in tamper-proof packages, to ensure their integrity.
"With quantum key distribution, we can guarantee unconditional security of the key," said Andrew Shields, quantum information group leader at Toshiba Research Europe Ltd. "What that means is it's secure from all advances in mathematics, engineering and computing."
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