The basic goal of encryption is to turn a piece of readable information (text, files, images…) into an unreadable format in such a way that the transformation can be reversed using a ‘key’. What are public and private keys? SSL, TLS, HTTPS? Where do client-side, server-side and end-to-end encryption fit in? A recent report from Forrester named data encryption as one of the top global Cybersecurity trends for 2017, so this is a big deal! We will try to explain some of the most important terms here, especially with regards to end-to-end encryption and why it matters. But there are many kinds of encryption, which can be very confusing. I know it's not perfect and many users blindly click throug those warnings, but I think it's a reasonable compromise.Encryption protects your data. Any user that shared data with you via your old key should get prompted and it should require an active click through of the warning to re-encrypt the data to the new key.
Or, if you legitimately re-keyed you can choose to accept the new key.
This way, if you have one deviced compromised, you can at least put your old key back, change your server password and regain control.
I recorded my passphrase while setting up e2e on my android before the client was stable (it seems the passphrase I recorded is not the one that was used to create the key).