PASSWORD PROTECT A CD-R

I want to burn a copy of my files and folders from my hard disk, at home, to use at work, as I work at various offices and move around a lot. I was wondering is it possible to password protect a CD so that no one can use (open, view etc) the CD unless they enter a password first. If it is not possible does anyone have any other suggestions as to what else I can do to protect the data from being view/opened or from using the CD? Early this year I burnt my data from the hard disk, which was mybackup, I took it to work and left it behind somewhere and have never found it. I need to be able to access all my files and folders regularly, I have put files on floppy disks but they don?t hold enough and I am forever copying files to floppy disks. I am sure there is a better solution. I can?t use the internet to share files as I don?t have internet access everywhere I go. Can anyone suggest what else I can do?