> Fundamentally, Phantom Secure was a hardware company. It sold modified BlackBerry handsets that had been customized to communicate only with other Phantom Sec

> Fundamentally, Phantom Secure was a hardware company. It sold modified BlackBerry handsets that had been customized to communicate only with other Phantom Secure devices. On top of that, it ran an email system that routed encrypted messages through Panama and Hong Kong. As a result, conversations were nearly impossible to intercept, and if law enforcement did snag a message, there was no way of decrypting it. There's free/open "encrypted chat" networks which may be more or less secure than commercial gray-market/criminal products. Is there any free-of-charge and open-source software for running your own infrastructure for messaging, blocking unencrypted communication and Apple/Google "phoning home" (perhaps through an unlocked-bootloader phone running AOSP/LineageOS), blocking data exfiltration through USB MTP/ADB/exploits (and possibly safeguards or automatic wiping upon hardware/RAM/CPU/TPM hijacking), automatic timer/face/accelerometer-based screen locks to prevent a phone from being used for long after being seized, and automatically wiping devices if they don't receive a signed "all clear" message from a server every few days (to guard against putting a phone in a Faraday cage to block out remote-wipe signals)? Of course this is mostly idle speculation, and I haven't tried implementing any of these ideas, even though I feel they would be useful to many.