Encrypted sync is a new way to sync data across your devices running Everdo. The main benefit of ESS over the standard network sync is that it works seamlessly over the Internet. It means that devices don't have to be on the same network anymore. Each device is still fully autonomous and maintains it's own offline copy of data, but they also send encrypted updates to the ESS server, which makes it possible for multiple devices to share changes in the background.
This is a companion discussion topic for the original entry at https://everdo.net/blog/update-1-2-2/