  This paper presents a new quantum protocol designed to simultaneously
transmit information from one source to many recipients. The proposed protocol,
which is based on the phenomenon of entanglement, is completely distributed and
is provably information-theoretically secure. Numerous existing quantum
protocols guarantee secure information communication between two parties but
are not amenable to generalization in situations where the source must transmit
information to two or more parties, so they must be applied sequentially two or
more times in such a setting. The main novelty of the new protocol is its
extensibility and generality to situations involving one party that must
simultaneously communicate different, in general, messages to an arbitrary
number of spatially distributed parties. This is achieved by the special way
employed to encode the transmitted information in the entangled state of the
system, one of the distinguishing features compared to previous protocols. This
protocol can prove expedient whenever an information broker, say, Alice, must
communicate distinct secret messages to her agents, all in different
geographical locations, in one go. Due to its relative complexity, compared to
similar cryptographic protocols, as it involves communication among $n$
parties, and relies on $GHZ_{n}$ tuples, we provide an extensive and detailed
security analysis so as to prove that it is information-theoretically secure.
Finally, in terms of its implementation, the prevalent characteristic of the
proposed protocol is its uniformity and simplicity because it only requires
CNOT and Hadamard gates, and the local quantum circuits are identical for all
information recipients.
