How do you like Schadeaux Technologies (pronounced shadow) for a business that creates censorship evasion hardware? I always thought it would be cool because "schad" was a German prefix and -eaux was a French suffix, but I then I learned that "schad" means harmful in German and -eaux forms plural diminutive male nouns, usually an animal, so it would really mean "a little harmful," but that can't be right because -eaux is only for nouns. Perhaps it would mean "a little harmful animal." :D
Your logo should be just the shadow of some small, invasive, but endearing or sympathetic animal, to get the oppressed-and-underground-but-not-defeated overtone. I want to say a mouse or rat, or a mole, but none of those are quite right. You might get some kind of insect to work, like a wasp, depending on what kind of vibe you're looking for.