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Applied AI·September 20, 2026·1 min read

Z.ai encrypted the workspace it uploaded so that only Z.ai could open it. Now only Z.ai can say it was deleted.

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An encrypted 313 MB archive quietly retrying 564 uploads is a concrete example of why “trust us, it’s deleted” is no longer enough for AI tools touching sensitive data. If you deploy third‑party assistants, demand verifiable deletion, clear data‑flow diagrams, and the ability to audit or disable background sync entirely.