For especially sensitive data, the assurance in this post -- that if you don't see a network request occur on save, your data remains local -- is not sufficient

For especially sensitive data, the assurance in this post -- that if you don't see a network request occur on save, your data remains local -- is not sufficient. Some malicious programs use techniques like delayed network requests to send data when you're not expecting it, and you basically have to audit the entire application to make sure it isn't making these covert requests.