  In this paper, we introduce a new quantum protocol for Detectable Byzantine
Agreement. What distinguishes the proposed protocol among similar quantum
protocols, is the fact that it uses only EPR pairs, and, in particular, $\Psi^{
+ }$ pairs. There are many sophisticated quantum protocols that guarantee
Detectable Byzantine Agreement, but they do not easily lend themselves to
practical implementations, due to present-day technological limitations. For a
large number $n$ of players, GHZ $n$-tuples, or other more exotic entangled
states, are not easy to produce, a fact which might complicate the scalability
of such protocols. In contrast, Bell states are, undoubtedly, the easiest to
generate among maximally entangled states. This will, hopefully, facilitate the
scalability of the proposed protocol, as only EPR pairs are required,
irrespective of the number $n$ of players. Finally, we mention that, even for
arbitrary many players $n$, our protocol always completes in a constant number
of rounds, namely $4$.
