Just shipped sTELgano — a zero-knowledge messaging app on Phoenix 1.8 + LiveView. The premise: two people share a fake phone number saved in each other’s contacts plus a PIN, and that’s the whole credential. The server only ever sees SHA-256 hashes and AES-256-GCM ciphertext — all crypto runs in the browser via the Web Crypto API.
AGPL-3.0. Repo at GitHub - sTELgano/sTELgano: Private messaging that hides in your contacts. · GitHub, live at https://stelgano.com. Opened a separate thread over in Chat / Discussions [LINK] for anyone who wants to dig into the design — unauthenticated channel socket, N=1 message invariant, LiveView as a state machine with crypto isolated to JS hooks.
