Qubit Messenger

Qubit is a minimalist post-quantum messenger. Unlike most messengers, Qubit uses only symmetric cryptography - no RSA, no Diffie-Hellman, no elliptic curves. How it works: • Meet your contact in person. Agree on a shared key. • Enter that key on both phones once. It never leaves the device. • Every message is encrypted with AES-256-GCM on your mobile phone before it leaves. The server only stores ciphertext. Open the channel only with someone you've actually met. That's the entire trust model. Simple. Auditable. Future-proof. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/