Difference between Latent and Masked Defect.

Latent bug is an existing uncovered or unidentified bug in a system for a period of time. The bug may have one or more versions of the software and might be identified after its release.

The problems will not cause the damage currently, but wait to reveal themselves at a later time.

Masked defect hides the other defect, which is not detected at a given point of time. It means there is an existing defect that is not caused for reproducing another defect.