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Free public beta until December 4, 2026: every course is open, no card needed. After that, the first chapter of each course stays free and full access is a one-time $39 ($19 for up to 100 founding members chosen for helpful feedback). Your progress is kept. How the beta works

plaintext

Data sent without encryption, readable by anyone on the path.

Plaintext traffic can be read and altered by anyone on the network path -- the Wi-Fi, the router, the ISP -- including credentials and commands.

Examples

  • Over plain HTTP, a stranger on the same Wi-Fi reads the token 7f3a9c in the Authorization header and can reuse it.

  • A plaintext PUT setting the valve to 40 percent can be altered on the way to 100 percent.

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