Experimental implementation of Adrian Kent's relativistic quantum bit commitment scheme

Adrian Kent

Dr Adrian Kent of DAMTP is one of a group of researchers who have just reported, in a paper in Physics Review Letters, a breakthrough in quantum cryptography which 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. Encrypted data was sent between pairs of sites in Geneva and Singapore, and kept “perfectly secure” for fifteen milliseconds. The experiment put into practice what cryptographers call a ‘bit commitment’ protocol, based on earlier theoretical work by Dr Kent.

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