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Ask anything about the cryptography this site covers. Questions are public, and each gets a first answer from Claude, an AI model, marked as AI; people can correct or add to it. How the AI answers work. Before asking, it's worth checking the existing discussions.

It becomes the discussion's title, for example "Why does TR-31 bind the key usage to the key block?"

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Continuing loads a widget from giscus.app and GitHub, which then see your IP address and browser details. Posting needs a GitHub account, and your question will be public.

Found a mistake on a page, or have a suggestion? Use Send feedback instead. Don't post personal data, secrets or real keys.