Jack Dorsey has introduced Bitchat, a decentralized messaging protocol designed for fully encrypted communication without internet connectivity. Drawing inspiration from Bitcoin's elimination of centralized intermediaries, Bitchat operates over Bluetooth Low Energy (BLE), enabling nearby devices to connect in a mesh network that relays messages from one device to another until they reach their destination. Messages are end-to-end encrypted using Curve25519 and AES-GCM, ensuring that only the intended recipient can access them. Additionally, Bitchat avoids collecting metadata, obfuscates user identities, and ensures messages disappear by default after delivery unless saved by the user. While Dorsey refrains from explicitly mentioning Bitcoin or blockchain in his description, he positions Bitchat as a peer-to-peer messaging solution that echoes Bitcoin's decentralized principles. This protocol aims to protect communication in environments where offline access or censorship is a concern.

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