  We analyse the generation of quantum discord by means of the dynamical
Casimir effect in superconducting waveguides modulated by superconducting
quantum interferometric devices. We show that for realistic experimental
parameters, the conditions for the existence of quantum discord are less
demanding than the previously considered for quantum entanglement or
non-classicality. The states with non-zero discord and zero entanglement
generated by the dynamical Casimir effect are a useful resource for quantum
cryptography.
