I know how to mount an ext3 filesystem in OS X with MacFUSE and fuse-ext2. But how can I mount an encrypted ext3 volume?
I have Mac OS X 10.6 "Snow Leopard" running.
Unfortunately there is currently no way to mount unencrypted LVM volumes in OS X, much less LUKS-encrypted volumes.
One really slow and "stupid" way to do this is to install a tiny linux distro in a virtual machine, let that work as a interface against the disk by sharing a folder with the host(OS X). It is completely overkill, but it will work.
You could try OSXCrypt which is "test-software" or something like that...
It might wreck your system since it's still underdevelopment. Not sure if you want that. I believe that it's supposed to let you access LUKS encrypted volumes under OSX. According to their website everything is a no-guarantee basis so if you have important or valuable files on the disk it's better off not trying it. Link here.