0
votes
1answer
100 views

How do you encrypt a USB drive partition with the Twofish cipher and SHA-512 hash without using TrueCrypt? [closed]

I've been trying to string together the right flags in cryptsetup: cryptsetup -y -h sha512 -c twofish-xts-plain64 -s 512 luksFormat /dev/sdx But it hasn't been working. When I enter the command ...
2
votes
0answers
57 views

expanding boot, moving LUKS root

GPT > Partition2 > LUKS > btrfs I need some additional space for my boot volume, so far I did: Shrink my btrfs volume by 250MB. btrfs resize -250M / Shrink the LUKS root volume cryptsetup ...
3
votes
1answer
402 views

How to set laptop screen brightness just after boot with full disk encryption

my girlfriend bought Lenovo Essential G500 i5-3230 and I installed Linux Mint 16 on it with full disk encryption. It is standard installation with encryption using dmcrypt and LUKS. But there is a ...
4
votes
3answers
269 views

Poor IO due to LUKS/Software RAID/LVM ordering?

I'm trying to determine if I should re-setup my RAID array due to poor IO performance. First off, the system: i7 920 4 4TB WD 5400 Green drives CentOS 6.3 host Secondly, the disk setup: ...
5
votes
1answer
267 views

Trying to understand LUKS encryption

I decided to encrypt my root partition with LUKS+LVM. My ThinkPad setup: Samsung 830 128GB SSD 750GB HDD Core 2 Duo 2,5 GHz P9500 8GB RAM But the more I read, the less I understand about those ...
3
votes
3answers
455 views

Best practice to backup a LUKS encrypted device

What's the fastest method to backup and restore a luks encrypted device (e.g. a full encrypted usb-device to a image-file). The usb-device can be decrypted/accessed. I'm looking for a solution to ...
3
votes
1answer
171 views

cryptdisks_start: precheck failed: the device contains a filesystem type crypto_LUKS

I'm trying to use cryptdisks_start to open a LUKS device that is defined in my /etc/crypttab. Unfortunately, the command fails with the following error message: martin ~ # cryptdisks_start ...
2
votes
2answers
129 views

Any reason not to use LUKS on a backup drive?

I have my hard disk encrypted with LUKS, but I make regular backups to an unencrypted external harddrive. Is there any reason I shouldn't setup LUKS on my backup drive as well? Obviously, the big ...
1
vote
1answer
73 views

mount other encrypted volume on wrong password entry

I have fully encrypted my laptop using dm-crypt and luks. So If I start my laptop I was prompted for a password before init will start. This works just fine. The problem A possible attacker will ...
1
vote
1answer
247 views

Dm-Crypt system encryption with different keys per user

I have found the following example configuration for a system encryption: Example 5: paranoid system encryption • whole hard drive encrypted with dm-crypt+LUKS └──> unlocked before boot, ...
1
vote
0answers
30 views

How do I encrypt the main partition of a SIFT (Ubuntu 9.10 variant) install?

I've got SIFT (based on Ubuntu 9.10) installed on a work laptop. We're trying to encrypt the entire installation (root partition and swap), which is apparently doable using LUKS, but I'm having some ...
3
votes
1answer
2k views

LUKS storing keyfile in encrypted usb drive

I already asked once about LUKS unlocking of multiple HDDs in Linux: LUKS and multiple hard drives. Now I would like to know how to secure store the keyfile used for the automatic unlock of the ...
1
vote
1answer
160 views

Overwriting disk before encryption

I'm going to create encrypted lvm on my disk. As a encryption mechanism I choose dmcrypt with LUKS. Here's my question - should I overwrite (for security reasons) whole disk before creating encrypted ...
3
votes
1answer
4k views

How to remove LUKS encryption?

I tried removing LUKS encryption on my home directory using the following command: cryptsetup luksRemoveKey /dev/mapper/luks-3fd5-235-26-2625-2456f-4353fgdgd But it gives me an error saying: ...
6
votes
2answers
2k views

Which partitions should I encrypt?

My laptop is currently running Windows and Fedora, but I'm planning to install Arch Linux as my sole OS soon. This current setup is using whole disk encryption through TrueCrypt, but I'm unsure if it ...
3
votes
1answer
6k views

How can I shrink a LUKS partition, what does `cryptsetup resize` do?

I am in progress of resizing a LUKS encrypted partition that contains a single ext4 filesystem (no LVM or something). The cryptsetup FAQ recommends to remove the old partition and recreate it, but ...
4
votes
2answers
644 views

Are there more advanced LUKS key schemes, e.g. 2 of 3 keys needed?

It seems like the two main LUKS encryption options are: USB keyfile (see http://superuser.com/questions/149578/how-can-i-use-a-keyfile-on-a-removable-usb-drive-for-my-encrypted-root-in-debian) ...
1
vote
1answer
3k views

Install Backtrack 5 r2 into running LUKS setup installed with ubuntu

One Harddisk (sda) Two Partions. With a working ubuntu running. 1) /boot 2) LVM with this virtual volumes/partions/ or whatever they are called inside: Swap Ubuntu Home Prepared for Backtrack Of ...
5
votes
1answer
2k views

Linux: LUKS and multiple hard drives

I have a Debian Linux system (amd64) installed on a RAID-1 system encrypted device (LVM on LUKS) and will have a RAID-6 of >=4 disks where I'll put my data (LUKS and maybe LVM). I think the basic ...
4
votes
2answers
2k views

RHEL6 LUKS with TPM support?

I'm surprised that this question is not asked more frequently, but (in RHEL) does LUKS support TPM's the way that Windows BitLocker does? If so, how is this feature implemented, and does it provide ...
4
votes
2answers
246 views

LUKS encryption for tape media?

I was wondering, if it was possible to use LUKS encryption with tape drives, QIC for instance. I'm using LUKS for USB drives and internal disks, even DVDs and CDROMs. But I was thinking of maybe ...