Smoke Crypto Messenger

Smoke Crypto Messenger is an open-source Instant Messenger that uses the McEliece encryption algorithm, proven secure against quantum computing. It uses its own server software, SmokeStack-Server, to create a decentralized chat ecosystem. The server is an Echo-Server, using the encrypted Echo-Protocol.

Smoke Messenger implements the McEliece Crypto System with four different moduli, including a classic modulus, two variants, and a Super-Modulus developed by Textbrowser.

Smoke's features include:

• Aliases: Contacts can be preserved without needing a phone number, using a Smoke-ID or an Alias to share the initial public McEliece key.
• Application lock: The application screen can be locked.
• Argon2id and PBKDF2 key-derivation functions.
• Authenticated encryption for chat content.
• Decentralized: The application doesn't rely on a central infrastructure, requiring at least one connection to a friend or server.
• No registration or phone numbers required.
• Encrypted communications.
• Fiasco forward secrecy: Several keys are used for forward secrecy.
• Juggling Juggernaut Protocol: Keys are established with the Zero-Knowledge-Paradigm.
• Obfuscation of resident secret keys.
• Ozone destinations: Private and public repositories for messaging to offline friends.
• Post offices for past messages: Past messages are stored and can be sent when connectivity is available.
• Public and private public-key servers.
• Group Chat: Semi-compatible with Spot-On via Fire.
• Steam Protocol: Reliable file sharing over the Echo.