If you are being sarcastic, you should be aware of Poe's law, which means we can't tell.

Security is hard. Encryption is hard. And don't call me Shirley!

Well implement one. While getting the encryption right is possible. There comes the pesky problems with presenting stuff to windows as a volume that works as well.

Well peer reviewed encryption libraries would take care of a huge proportion of that.

http://dokan-dev.net/en/ might work on windows for implementing something you might otherwise do via FUSE. Can't speak for windows as ive not used it for a decade or more.