  In this paper, we propose two semi-quantum dialogue (SQD) protocols by using
single photons as the quantum carriers, where one requires the classical party
to possess the measurement capability and the other does not have this
requirement. The security towards active attacks from an outside Eve in the
first SQD protocol is guaranteed by the complete robustness of present
semi-quantum key distribution (SQKD) protocols, the classical one-time pad
encryption, the classical party's randomization operation and the decoy photon
technology. The information leakage problem of the first SQD protocol is
overcome by the classical party' classical basis measurements on the single
photons carrying messages which makes him share their initial states with the
quantum party. The security towards active attacks from Eve in the second SQD
protocol is guaranteed by the classical party's randomization operation, the
complete robustness of present SQKD protocol and the classical one-time pad
encryption. The information leakage problem of the second SQD protocol is
overcome by the quantum party' classical basis measurements on each two
adjacent single photons carrying messages which makes her share their initial
states with the classical party. Compared with the traditional information
leakage resistant QD protocols, the advantage of the proposed SQD protocols
lies in that they only require one party to have quantum capabilities. Compared
with the existing SQD protocol, the advantage of the proposed SQD protocols
lies in that they only employ single photons rather than two-photon entangled
states as the quantum carriers. The proposed SQD protocols can be implemented
with present quantum technologies.
