But how did you get this to claim that he packed it:
drwxr-xr-x genjix/genjix 0 2012-07-07 20:18 bitcoinica_legacy/
You are implying that genjix intentionally leaked the code. I can't confirm that.
This
$ tar -jtvf bit.tar.bz2 | head -n1
gives this
drwxr-xr-x genjix/genjix 0 2012-07-07 20:18 bitcoinica_legacy/
which means that the bitcoinica_legacy folder that was packed to the encrypted file had the owner genjix from group genjix and was last modified at 2012-07-07 20:18
If I unpack the file to my system it will have owner "me" from group "me". If I pack it again and run the above command it will give me a similar line but with my name and the date on which the folder was created/modified on my system when I unpacked it.
I posted all you needed to do to. Not sure why you're asking lol