[cryptography] quantum key distribution

[martman]

I'm reading up on quantum key distribution schemes, mostly: BB84, B92 and the EPR Protocol, and I'm having some problems relating them.

Is it correct to say that BB84 is a special case of B92(with extra specific states)? Is it also safe to say that both BB84 and B92 are special cases of EPR Protocol(with its entanglement being the most flexible possible)?

Anyone happen to know of a nice comparison? there's a nice selection online for BB84, not much for B92 or the EPR Protocol unfortunately.

Thanks

 

[azntoon]

in advance!Yes, it is correct to say that BB84 is a special case of B92, since B92 is a more general version of BB84. However, it is not necessarily safe to say that both BB84 and B92 are special cases of the EPR Protocol, since the EPR Protocol is a different type of quantum key distribution protocol. The EPR Protocol uses entangled states whereas BB84 and B92 use non-entangled states. So while the EPR Protocol may be more flexible, it is not necessarily a special case of BB84 or B92.