1. A computer-implemented method of detecting potential steganography use comprising: identifying an electronic communication associated with a first computer file; locating a second computer file that at least appears to be a copy of the first computer file based on at least one file characteristic the first computer file and the second computer file have in common; comparing at least one file characteristic of the first computer file to a corresponding file characteristic of the second computer file; applying a set of steganographic criteria to at least one result of the comparing; and determining whether the first computer file potentially includes hidden content based on whether at least a portion of the steganographic criteria are satisfied.