I have several computers that synchronize my documents folder from my main computer (using the standard Windows 7 'offline folder' synchronization). This system works, and while each of the computers are PGP encrypted, I realize the documents themselves are not when the computers are running. They are transferred between computers, and shared from the main computer, with no encryption at all. This is fine for most of the documents, but I have some sensitive information that I would like to keep encrypted, so even in the event of the document files getting compromised one day (moving across the network during a synchronization/replication, one of the computers being compromised while running, etc) the sensitive documents are still encrypted.
I've looked at several programs, but they seem to require mounting a volume, etc. which is a little more complicated than I'm looking for. What I'm envisioning is having an application on the computer which, when navigating to a file (perhaps containing a folder) will pop up asking for a password, and upon entering the password, will be able to navigate the file within that folder.
Open to any suggestions - again, just trying to avoid 'over-complicating' this.