Quantum ’sealed envelope’ system enables "perfectly secure" information storage

Breakthrough guarantees "unconditional" security of information by harnessing quantum theory and relativity, and has been successfully demonstrated on a global scale for the first time. I see this as the first step towards a global network of information controlled by the combined power of relativity and quantum theory - Adrian Kent A breakthrough in quantum cryptography demonstrates that information can be encrypted and then decrypted with complete security using the combined power of quantum theory and relativity - allowing the sender to dictate the unveiling of coded information without any possibility of intrusion or manipulation. Scientists sent encrypted data between pairs of sites in Geneva and Singapore, kept "perfectly secure" for fifteen milliseconds - putting into practice what cryptographers call a 'bit commitment' protocol, based on theoretical work by study co-author Dr Adrian Kent, from Cambridge's Department of Applied Mathematics and Theoretical Physics. Researchers describe it as the first step towards impregnable information networks controlled by "the combined power of Einstein's relativity and quantum theory" which might one day, for example, revolutionise financial trading and other markets across the world.    'Bit commitment' is a mathematical version of a securely sealed envelope. Data are delivered from party A to party B in a locked state that cannot be changed once sent and can only be revealed when party A provides the key - with security guaranteed, even if either of the parties tries to cheat.