The rise in child sexual abuse material (CSAM) has been one of the darkest Internet trends, but after years of covering CSAM cases, I've found that few of those arrested show deep technical sophistication. (Perhaps this is simply because the technically sophisticated are better at avoiding arrest.)
Most understand that what they are doing is illegal and that password protection is required, both for their devices and online communities. Some can also use tools like TOR (The Onion Router). And, increasingly, encrypted (or at least encrypted-capable) chat apps might be in play.
But I've never seen anyone who, when arrested, had three Samsung Galaxy phones filled with "tens of thousands of videos and images" depicting CSAM, all of it hidden behind a secrecy-focused, password-protected app called "Calculator Photo Vault." Nor have I seen anyone arrested for CSAM having used all of the following: