Jack Dorsey 推出了名为 Bitchat 的新私密消息应用，旨在提供无需互联网或蜂窝网络连接的离线通信。该应用使用去中心化的蓝牙技术，通过蓝牙低功耗 (BLE) 网状网络实现用户间的直接通信，有效扩展了通信范围。尽管 Dorsey 承诺这是一个安全平台，但由于潜在的身份验证漏洞，该项目的安全性受到了质疑。Dorsey 承认该应用仍处于开发阶段，并提醒用户不要在生产环境中使用，直到其通过外部安全审查。

📱 Bitchat 是一款由 Jack Dorsey 推出的私密消息应用，主打无需互联网或蜂窝网络连接的离线通信。

📡 Bitchat 使用蓝牙低功耗 (BLE) 网状网络技术，实现用户间的直接点对点消息传递，理论通信范围可达 300 米。

💡 该应用使用 Dorsey 公司的开源 AI 助手 Goose 进行编码，旨在创建一个无需依赖中心化基础设施的、具有弹性的私密通信方式。

⚠️ 尽管 Bitchat 承诺提供安全平台，但由于身份验证系统可能存在的漏洞，其安全性受到了一些质疑。Dorsey 承认该项目仍在开发中，并提醒用户不要在生产环境中使用。

Jack Dorsey — Twitter, Bluesky, and Square co-founder and Bitcoin evangelist — is now taking on the world of private messaging apps.

Announced earlier this week, Dorsey's latest project is called Bitchat, a reportedly secure and private messaging app that doesn't need to connect to the internet or cell service at all. Instead, Dorsey explains in a recent white paper published on GitHub, the end-to-end encrypted app uses decentralized Bluetooth tech to connect one user to another — a type of offline communication popularized by apps like Bridgefy and preferred among the privacy-focused.

The system Dorsey is hinging his latest project on is known as Bluetooth Low Energy (BLE) mesh networks. These networks traditionally have limited range — most Bluetooth connections work within 100 meters — but Dorsey claims his new tech can extend to 300 meters (or 984 feet). The app, which Dorsey called a "weekend project," was coded using the help of Goose, an open-source AI "vibe coding" assistant built by his company Block.

"bitchat addresses the need for resilient, private communication that doesn't depend on centralized infrastructure," Dorsey writes. "By leveraging Bluetooth Low Energy mesh networking, bitchat enables direct peer-to-peer messaging within physical proximity, with automatic message relay extending the effective range beyond direct Bluetooth connections."

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However, the tech founder's promises of an entirely decentralized, secure platform have already been called into question by users and experts, in part due to a potentially vulnerable authentication system that could allow a malicious actor to intercept the secure connection. Dorsey has since added a disclaimer alongside a note that the project is a "work in progress." The disclaimer reads: “This software has not received external security review and may contain vulnerabilities and does not necessarily meet its stated security goals. Do not use it for production use, and do not rely on its security whatsoever until it has been reviewed."