I would like to mount a Truecrypt container over a VPN connection. The VPN connection averages 0.4Mb/sec in either direction.
Does Truecrypt add a significant overhead (in terms of bytes) to reads/writes that make mounting a container through a slow connection unfeasible? Or would the bytes read/written, for a particular activity, be largely the same as reading/writing directly to a Windows share?
In case it helps, I am trying to come up with a remote backup solution that encrypts the data but still allows for "difference only" backups. My idea is that I open a remote Truecrypt container and then use something like Robocopy to sync the contents of the container with some local data.