Vol. 6, Issue 3, Part G (2020)

Abstract
In this paper we have provided a generalized protocol of the QD and analyzed its efficiency and security. To implement the protocol, we require a set of unitary operators that form a group under multiplication and a set of mutually orthogonal states on which the information is to been coded by this group of unitary operators. A systematic procedure for the construction of such groups and specific examples of states that can be used to implement the generalized protocol of QD are provided. It is shown that GHZ state, GHZ-like state, W state, cluster state, |Ω) state, Q4 state and Q5 state can be used for implementation of the QD protocol.