We Built a Signal Protocol Messenger. Then We Checked If It Was Legal in 5 Jurisdictions.
TL;DR: We checked Halonyx - our self-hosted E2EE messenger implementing X3DH + Double Ratchet - against the EU's Chat Control, US EARN IT Act, India's IT Rules 2021, the UK's Online Safety Act + Investigatory Powers Act, and the UN Cybercrime Convent