How to recover deleted encrypted files under /home/$USER/.Private folder in /dev/sdb5 partition with ext4 Linux LVM file system?

[Qiubo Su (David Su)]

Dear Ubuntu Users,

Recently I incidentally deleted a lot of files *(the encrypted files under
/home/$USER/.Private folder, about 140GB in total. some of the VM files
size is about 20GB. the /home/ folder is on /dev/sda5 partition with ext4
Linux LVM file system. recently i run "rm -rf .Private" under /home/$USER
folder to incidentally deleted almost all the files under /home/$USER
folder)* from the Ubuntu 64 bits Server OS system server *(i updated it
from Ubuntu 12.04 to Ubuntu 14.04 in a couple of months ago)*, and I'm in
the process to recover them with extundelete, photorec, ext3grep, testdisk
etc. recovering tools (with Ubuntu 14.04.2 LiveCD), but none of them can
successfully recover all the deleted files as expected.

It is much appreciated if any experienced data recovery experts among you
can provide me some guidance to undelete all these data ASAP.

Thank you very much for your help and have a great Easter !

Best regards,
Q.D.S.
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