  Quantum secure data transfer is an important topic for quantum cyber
security. We propose a scheme to realize quantum secure data transfer in the
basis of quantum secure direct communication (QSDC). In this proposal, the
transmitted data is encoded in the pulse shape of a single optical qubit, which
is emitted from a trapped atom owned by the sender and received by the receiver
with another trapped atom. The encoding process can be implemented with high
fidelity by controlling the time-dependent driving pulse on the trapped atom to
manipulate the Rabi frequency in accordance with the target pulse shape of the
emitted photons. In the receiving process, we prove that, the single photon can
be absorbed with arbitrary probability by selecting appropriate driving pulse.
We also show that, based on the QSDC protocol, the data transfer process is
immune to the individual attacks.
