Fedora Security :: Remove Encryption From An Hard Disk?
Feb 24, 2009
I was trying to install Fedora 9 on my new laptop that came with Win XP. I have selected the option to wipe out all partition and create a default layout with the Encryption option selected. But that installation got stopped on the middle, therefore I have started the installation again. This time it asked for the encryption password as expected but don't know why, its not accepting my password. I am 100% sure that the password is correct but it is not allowing me to enter into the hard disk partition section.
My question is, how do I remove encryption from my hard disk? I don't need to preserve the data, I just need to use my hard disk again. Is there any boot CD that allow us to format encrypted disks without prompting for a password?
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Jul 31, 2010
Is there any way to remove the whole disk encryption without reinstalling? I'm running Ubuntu 10.04.
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Jul 28, 2009
I have currently a file server that runs on Fedora 9, and all other PCs (mostly running Windows XP) access the file server via SAMBA. Everything works perfectly! However, lately a home invasion in my neighborhood got me thinking. If they take my file server, my data is not protected. So, I would like to implement the LUKS partition encryption (/home) which sits on a separate disk. However, I don't quite like the decryption process at boot time. In other words, I would like to wake up the file server (WOL) remotely, and when it's done booting, I would like to log-in using the other PCs and enter the passphrase remotely to decrypt /home. Is this possible using LUKS encryption (i.e., cryptsetup)? If not, what would be another alternative to what I am trying to do using a secure encryption (so that the data is safe from thieves)?
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Oct 21, 2010
Which is the best whole hard disk encryption software for RHEL 4.6. Tried Truecrypt but was not success in making it work. First had issue with fuse version, then with glibc and etc.
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May 3, 2010
When I installed, I selected the option to encrypt my home folder. I believe this is causing constant crashes now, since error message is user id/password related. Is there a way to remove the encryption?
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Apr 10, 2011
Quote: The importance of security should never be underestimated. The consequences of losing data can be disastrous for any organisation. For example, the loss of a single unencrypted laptop may have huge repercussions. This could include breaching data protection legislation with the risk of a significant fine, a loss in the confidence of an organisation, as well as the risk that sensitive data may fall into the hands of a competitor or third party with malicious intent.
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Nov 14, 2010
I do know about cold boot attacks. But I ran across a couple of posts/websites that had me wonder if it is possible, without the passphrase, to just remove the encryption?
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Aug 8, 2010
Is there a way to change the password for the whole disk encryption?
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Oct 20, 2010
For some reason I can't find any documentation re: the algorithm(s) used by Ubuntu to encrypt the filesystem... Anyone know what it is?? AES?
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Apr 13, 2011
Is there a way to install ubuntu 10.04 or 10.10 with full disk encryption? I read how to do it in the 8.0 version, was wondering if it is still possible?
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Jan 13, 2010
this isn't really a security question, per se, so feel free to move. It is related to full disk LVM encryption though. Full disk didn't work for me with grub2 after running dd to a remote server, so I downgraded to grub1. No biggie. However, I have neither grub or grub2 as selected in Synaptic.Let's say I forget which I have installed. How would I determine what version of grub is installed at the moment. I'm assuming it's somehow installed on in the mbr but not on the OS. I didn't mean to do anything funky. Is that the normal setup? I'm deploying these systems to users and want to be able to troubleshoot issues in the future (hopefully that will not be needed!) grub --version does not work because it is not installed.
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Jan 18, 2010
I encrypted a harddisk via Disk Utiluty. What alogythm is it encrypted by now? Is it safe? What should I be aware about?
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Apr 16, 2009
Can this be done and to restore the disk with a similar cat command.
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Sep 28, 2010
I was told I don't have Ubuntu installed, how do I remove "wubi" of my hard disk. Can't find it anywhere in partitions or anything.
And would anyone know a Free FTP Backup server for about 6gs of space so I can backup my music & such?
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Jan 10, 2011
1. Fedora 14 has a user friendly disk encryption setup.However, there doesn't seem to be an option to change the encryption parameters during setup. Since I can handle the overhead, I would like to change the encryption algorithm and the key length for the default install.
2. I have created an additional encrypted drive (the entire HD) which claims to have its own encryption functionality (Seagate Constellation 1TB). Does Fedora use the built-in encryption mechanism by default? Is there any way to tell?
3. I can't seem to find any utility to tell me what the actual key size is for different HD's I have encrypted. "cryptsetup --help" seems to print out only the information for the default encrypted O/S which is the default 256 bit.
My problem is whether the -s option work when set to a 2,048 bit key length? Or, does it fall back to a 256 bit key length if it fails to do so? Or, does it automatically use the built-in encryption of the hardware? If the -s option doesn't work with a 2,048 bit key setting, can the kernel be recompiled to do so?
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Mar 26, 2010
Can't delete files from external hard disk.
Getting message,"Input output error or unreadable/corrupted file"
Is there any way to delete this?
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Oct 28, 2010
My SSD HD supports ATA Security. Does Macbook EFI and linux support it? I know hdparm does. Who will do the unlock at each bootup? Can I still set a password without erasing the disk?
Update: removed "SED full hard disk encryption" from the title based on comment by @ataboy. Some might still refer to this ATA security incorrectly as "encryption" however.
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Feb 12, 2010
I am investigating full disk encryption and have made a DD copy of the hard drive which has been encrypted, this DD file is stored on my computer for analysis.
First question is - Anyone know how i can access data in this DD file even though its been encrypted?
Second question - Is there a DD command where i can image the systems memory? I ask this because when a system is turned on, to get past the pre-boot authentication stage you need a password. From what i understand, this password will be passed in to ram when power is applied to the system. Making a copy of the memory will also copy the password?
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Mar 22, 2009
I have an encrypted /home partition but would like to set up a guest account for my brother. Obviously, encryption doesn't work so well when you give out the key so what I'd like to do is specify a different, unencrypted location as a home directory for the guest account so he doesn't need access to that partition. Is there a way of doing this?
I've got fedora 10, dual boot with windows, 2 hard drives, 1st is NTFS windows. 2nd is split into a swap, ext3 for the OS, and an encrypted partition for /home.
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Oct 19, 2009
When I installed Fedora selected the option to encrypt the hard drive. I want to change the passphrase, is there a way to change the passphrase, or do I have to re-install Fedora?
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Jun 17, 2010
1.) I am wondering how to enable the lock to an encrypted partition which has been unlocked, using luks? On boot, I am been asked automatically for the pass phrase to unlock my partitions. After doing a back up, I want lock the encrypted partition again, but I don't know the command?! I umounted the partition but after mounting it again, I was not asked for the pass phrase but had access to my data.
2.) How secure is the default fedora version of luks? Is truecrypt better?
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Mar 15, 2010
I have now almost completed my aim of using Debian and PClinuxOS on different installed hard disks. For PCLOS I use an On-Disk set of disks which I have installed on a separate hard disk which serves as a repository from Synaptic, which makes program install/remove very quick. Is it possible to do the same thing with the 5 DVD's for Debian lenny on another hard disk?
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Jul 19, 2010
I'm planning a fresh F13 install, with separate partitions for /boot, /home, /tmp, /, and swap. All but /boot will be logical volumes, and I'd like to encrypt all but boot. If I encrypt the underlying partitions, is there any reason to also encrypt the logical volumes themselves?
my system will be:
HP dv6-3040us Pavillion laptop
AMD Phenon II
4GB DDR3
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Jun 14, 2011
I have a computer running Fedora 14 and when I installed it, I chose to encrypt the drive.
I've recently changed the way I have things set up and don't want the encryption any more. From what I've read there is no way to simply and easily remove the encryption, so what I would like to do is input the pass phrase remotely.
so, Is there anyway I can type in the pass phrase remotely, or remove the encryption?
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Jun 25, 2011
I have been trying to setup IPSEC encryption between two linux boxes. I have a server application which runs on Linux Box A and a client application which runs on Linux Box B. The client sends the data to server. I have captured wireshark logs at both server and client end. In the wireshark logs I can see that the Box B send ESP packets to the Box A.
But the server Application running at Box A is is not able to get any packets. If I turn the policy off at Box B, Box B sends normal UDP data packets to Box A, but still the Server Application running at box A doesn't get any packets.( Expected behavior since policy at Box A enforces that all packets coming from Box B should be encrypted.)
If I turn the policy off at Box A and Box B both, the server application receives the unencrypted data which is also expected behavior. But when the policy is turned on at both the boxes the encrypted packets reach the Box A but are not delivered to the server application. If anyone has faced such issue please help me to debug this issue. I have attached the ifconfig and policy settings at Box A and Box B for your reference.
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Dec 1, 2010
I had Vista on my laptop and then started dual booting with windows.downloaded ubuntu today and installed but just not feeling it. i have looked in add remove programs but its not there. can someone point me in the right direction. How do i remove ubuntu including the grub screen and free the space up on the hard disk because i'm missing 25gb.
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Sep 8, 2010
I like to encrypt my swap and tmp partition with /dev/urandom but it doesn't work. I tried it 100 times and now I have no idea.
Code:
cat /etc/crypttab
swap /dev/sda3 /dev/urandom swap,cipher=aes-cbc-essiv:sha256
cat /etc/fstab
/dev/mapper/swapswapswapdefaults0 0
If I reboot I get the message "/dev/mapper/swap" doesn't exist. It seems, that crypsetup doesn't setting up the encrypted block device. SElinux is in permissive mode.
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Apr 2, 2010
i am having a problem that i would call a bit "important" with my server. so, from last 3 weeks the used space of my hard disk (RAID I) started growing up. i have 2 x 1 tb HDD working on RAID I and i did not install anything those weeks. the space just started changing from 90 GB till 580 GB. now the situation is stable there but i think it's not normal.
the bandwidth usage is low (like 120 gb in 2 months) and i am running 6 counter strike gameservers, a forum, a very little website and some local stuffs... a friend of mine told me that my server could have been hacked but i am afraid it did... some useful informations: when i reboot the server the used space goes down again to ~100 GB and then it starts going up again. i cant really find where all those files are located:
[Code]...
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Apr 8, 2009
after installing Ubuntu on one WD 500 GB hard disk and after making mistake and pasting wrong code into Terminal:my OTHER WD 500 GB hard disk that was also in the system (I guess it was "hd1") - died.The problem must be, I guess, I typed wrong code: "hd1,1" instead of "hd0,0".)500 GB (NTFS) of data was on that other (non-Ubuntu) hard disk, and now I can not access it anymore. While booting, system gives "Hard Disk Error" warning and stops.One again: I installed Ubuntu od one hard disk and at the end of instalation I pasted wrong code for GRUB, giving address of another hard disk. Now that other hard disk has error and will not work
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Sep 23, 2010
I want to copy hard disk have ubuntu 10.04 and ext4 to 1000 hard disk for new 1000
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