  Blind quantum computation is a scheme that adds unconditional security to
cloud quantum computation. In the protocol proposed by Broadbent, Fitzsimons,
and Kashefi, the ability to prepare and transmit a single qubit is required for
a user (client) who uses a quantum computer remotely. In case a weak coherent
pulse is used as a pseudo single photon source, however, we must introduce
decoy states, owing to the inherent risk of transmitting multiple photon. In
this study, we demonstrate that by using a heralded single photon source and a
probabilistic photon number resolving detector, we can gain a higher blind
state generation efficiency and longer access distance, owing to noise
reduction on account of the heralding signal.
