Fig. 3
From: Security analysis of qutrit quantum secret sharing with linear optical correlation measurement
A schematic diagram of our protocol. There are three authorized parties, Alice, \(\hbox {Bob}_{{1}}\), and \(\hbox {Bob}_{{2}}\), and one untrusted party, Charlie. Each of the authorized parties generates a single photon state according to their choice of an encoding basis and three-dimensional information. They send the quantum states to Charlie who measures a correlation among the OAM mode of the three photons by means of a tripartite three-dimensional correlation measurement. The three authorized parties can share a secret by using their encoded information and the result of the measurement.
