Well, if you did read post#90, then you probably knew about Dish's EFS, i.e. own file system what has been created back to time of 501/508 and still using in 622/722.
EFS (Extent File System) has been around for some time. I don't know if that's what dish is using or not. I haven't bothered to look into at all.
Here's a link to a crypto system that could easily be used by Dish (it's freeware): SourceForge.net: loop-AES
Cheers,