Encrypting different directories

[Robin Laing]

Robin Laing wrote:
> 
> I am looking into this as well.
> 
> I don't want to encrypt the whole home directory as it will be on a RAID 
> device and doesn't require it.  Not all users require encryption at all 
> times.  What I want is the ability to encrypt subdirectories as 
> required.  Such as work done at home that needs to be protected from 
> everyone else but me.  Something that needs to ensure that the files are 
> encrypted, even if the power is removed to crash the system.
> 
> Enough control to allow this to be done in the background instead of 
> having to decrypt and re-encrypt directories/files as required. 
> Pre-assigning a loop back device would require to much space dedicated 
> to a single user/application that would change as requirements change. 
>  40gig one day and 200 gig the next.
> 

I have a question on this.

Is it possible to mount loop devices as LVM's or is it the other way 
around?  This could allow changes to be made as required.

-- 
Robin Laing