Cryptgeon — одноразовые зашифрованные заметки

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Cryptgeon is a self-hosted service for one-time secret notes: you create an encrypted note or file, get a link, and after the first open (or when it expires) the content is destroyed. Reach for it when you need to securely pass a password, key, token, or sensitive file: send a link knowing the secret is read once and won't linger in chat history. Data is encrypted client-side, the server stores only an encrypted blob in memory and never sees the content, and size and time limits are configurable. It deploys on your own server (Docker). Its focus is private one-time secret sharing via self-destructing links, not a password manager or general file sharing: a narrow "pass a secret so it leaves no trace" job. In spirit it is a self-hosted counterpart to services like PrivateBin/one-time secret.