  We present a new protocol in which a secret multiqubit quantum state
$\ket{\Psi}$ is shared by $n$ players and $m$ controllers, where $\ket{\Psi}$
is the encoding state of a quantum secret sharing scheme. The players may be
considered as field agents responsible for carrying out a task, using the
secret information encrypted in $\ket{\Psi}$, while the controllers are
superiors who decide if and when the task should be carried out and who to do
it. Our protocol only requires ancillary Bell states and Bell-basis
measurements.
