Hello alexcecconi,
First we don't match fingerprint images, we extract templates from fingerprint images(from this point images are not required anymore), then we use those templates in matching. Templates contain extracted fingerprint data(e.g. minutiaes, cores, etc.), but they are not encrypted and our SDK doesn't have encryption options.
Also there was already questions about template encryption, it should be useful:
viewtopic.php?f=3&t=95701&p=106661&sid=17bfa05c7b46de2dacac76eebe632acf#p106661If you have any questions, feel free to ask.