BBM92 is a

quantum key distribution Quantum key distribution (QKD) is a secure communication method which implements a cryptographic protocol involving components of quantum mechanics. It enables two parties to produce a shared random secret key known only to them, which can then ...

without Bell's theorem developed using polarized entangled photon pairs by Charles H. Bennett ,

Gilles Brassard Gilles Brassard, is a faculty member of the Université de Montréal, where he has been a Full Professor since 1988 and Canada Research Chair since 2001. Education and early life Brassard received a Ph.D. in Computer Science from Cornell Univ ...

and N. David Mermin in 1992. It is named after the trio's surnames as (Bennett, Brassard and Mermin, BBM92). It uses

decoy state Within quantum cryptography, the Decoy state quantum key distribution (QKD) protocol is the most widely implemented QKD scheme. Practical QKD systems use multi-photon sources, in contrast to the standard BB84 protocol, making them susceptible t ...

of multiple photon instead of single. The key differences in E91 protocol and B92 uses only two states instead of four states used by E91 protocol and

BB84 BB84 is a quantum key distribution scheme developed by Charles Bennett and Gilles Brassard in 1984. It is the first quantum cryptography protocol. The protocol is provably secure, relying on two conditions: (1) the quantum property that inform ...

It 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 Eavesdropping is the act of secretly or stealthily listening to the private conversation or communications of others without their consent in order to gather information. Etymology The verb ''eavesdrop'' is a back-formation from the noun ''eaves ...

secure and hack proof {{Cite web , title=BBM92 protocol , url=https://www0.gsb.columbia.edu/faculty/azeevi/PAPERS/QKD_PRA_final.pdf https://opg.optica.org/viewmedia.cfm?uri=oe-16-23-19118&seq=0 https://core.ac.uk/download/pdf/48631569.pdf for distance of 200-300 m.

References

Quantum cryptography Photonics