BBM92 is a quantum key distribution (QKD) protocol named after Charles H. Bennett, Gilles Brassard and N. David Mermin in 1992[1] The BBM92 is a variation of the entanglement based protocol where Alice and Bob measure the photons of the EPR pairs in complementary (i.e., Z and X) bases. Eve’s tampering is tested by checking the correlations in these two bases rather than testing the violation of the Bell inequality. As such, the security of the BBM92 protocol is based on the assumption that measurements in the complementary bases are accurately implemented, meaning that the measurement bases must be precisely aligned. The security can only be assured if this condition is met in the actual implementation.[2] The BBM92 QKD protocol uses decoy state of multiple photon instead of single photons. The key differences in E91 protocol and B92[3] uses only two states instead of four states used by E91 protocol and BB84
BBM92 protocol
BBM92 protocol
Developed by
Charles H Bennett, Gilles Brassard and N David Mermin
Introduced
February 3, 1992
The BBM92 QKD protocol is used for non-orthogonal quantum transmission 0 can be encrypted as 0 degree and 1 as 45 degree in diagonal basis BB92 protocol. There are no eavesdropping secure and hack proof [4][5][6][7] for distance of 200–300 m.
