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Thread: Encrypted filesystem

  1. #1
    Junior Member
    Join Date
    Sep 2001

    Question Encrypted filesystem

    Does such a thing exist? and how does it works?
    what about performance? what kind of encryption does it use? how secure is it? how does it store the key?

    Can anybody give me some answers?

  2. #2
    Junior Member
    Join Date
    Sep 2001
    They DO exist, here is some info:

    for windows there is:
    Secure FileSystem (SFS) for DOS/Windows
    availble at:

    for linux there are the following:

    CFS is a way of encrypting entire directory trees and allowing users to store encrypted files on them. It uses an NFS server running on the local machine and is quite slow due to the nature of the program and algorithms used. More information is available at :

    TCFS is an improvement on CFS, but unlike CFS requires kernel patches. It is also only available for the outdated 2.0.x kernels. More information is available in the TCFS FAQ
    More info at

    The Loopback Encrypted Filesystem HOWTO describes another loopback filesystem kernel patch. Many types of encryption can be used, including DES, twofish, blowfish, IDEA, and others.

    Hope This Helps
    ZXtech UNIX Hosting

  3. #3

    Question An additional question...

    Is it possible to somehow encrypt the content of your entire HDD:s in such way that you would need to boot from a floppy and get the keys out of the floppy and decrypt them with your passphrase? And then go on loading OS and keeping the content of HDD:s always encrypted?

    Kinda like Scramdisk or PGPdisk but somehow you would have to be able to "keep" the key to open them in your computers memory and not let Windows kill it off there at any time.

    Can it be done or is hardware solution needed?
    My privacy related homepage and PGPkeys:

  4. #4
    Junior Member
    Join Date
    Sep 2001

    More like this

    I havenīt checked all the links yet, but i was thinking of something like this:

    download a file e.g. rsafs.o

    insmod rsafs.o
    mkefs.rsa /dev/hde1

    and then put the following in fstab

    /dev/hde1 rsafs ..... an so on

    But as i tould you, havent checked all the links yet :=)

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