Strong protection keeps decryption keys only on your devices, covering notes, attachments, and titles whenever possible. Watch for exceptions buried in support pages, like unencrypted search indexes or preview images. If recovery requires company assistance, ask how that works without them holding material that could expose your writing.
Even when content is protected, timestamps, device names, IP addresses, and folder structures can reveal sensitive patterns. Prefer apps that reduce metadata, batch requests, and allow private network settings like custom DNS or VPN-friendly behavior. A restrained, predictable sync footprint often signals thoughtful engineering and respect for your boundaries.
Look for security whitepapers, independent assessments, and clear vulnerability disclosure programs. When incidents occur, the best teams share timelines, impacts, and fixes without blame-shifting. Openness helps you judge whether promised safeguards operate reliably in reality, not only when everything goes right during polished product demonstrations or sales calls.
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