We need to access a user's username and password in order to help him auto-fill the information later. But All data is completely locally encrypted using AES256, so nobody, can access a user's real personal information but himself.

And when it comes to data synchronization, we use HTTPS to transfer the already encrypted data to our cloud server. The whole process is 100% safe because of SSL.

More details can be found here: https://www.itopvpn.com/privacy