  Random number generators are employed for stochastic simulations and
cryptography. Besides the quality of randomness, a crucial aspect for
applications is security, namely the monitoring of the lower bound on the
entropy produced by the generator in any context, even fraudulent ones. In this
regard, quantum entanglement represents an ideal resource, because it provides
non-classical correlations between intrinsically random outcomes. However,
entanglement-based certified random numbers generators are particularly
challenging from a practical point of view. Here, we demonstrate a new
certified quantum random number generator based on momentum-polarization
entangled single photon states. The use of single particle entanglement allows
employing an attenuated laser source and a simple setup where only linear
optical components are utilized. A semi-device independent modeling of the
photonic quantum random number generator certifies a minimum entropy of $(2.5
\pm 0.5)\%$, corresponding to a generation rate of 4.4 kHz. Modeling the
generation stage of the setup permits to increase the certified minimum entropy
to $(30.1 \pm 0.5)\%$, implying a generation rate of 52.7 kHz, at the expenses
of an increased level of trust on the system.
