Fully Diluted Market Cap. Bob records these photons and then reports back the first successfully measured photon j to Alice along with a random bit b. The experimental setup they used with the Clavis2 system, involves a two-way approach. Namespaces Page Discussion. In , quantum cryptography emerged from a paper written by Charles H. It is a modified version of Proof-of-Stake 3. Obviously, the smaller the bias better the protocol. Unlike the early PoS protocols, here the block reward is constant and does not depend on coin age for determining the likeliness of getting it.