All questions relating to LUKS (the disk-encryption specification) for Linux

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0
votes
1answer
14 views

Can I “cryptsetup … luksFormat” a partition formatted with Ext4, or must it be unformatted?

I would like to setup Full Disk Encryption (FDE) for an external harddrive. My question is about the sequence of formatting. Will the following sequence work fine or do I need to run luksFormat on an ...
-1
votes
0answers
34 views

Encrypted lvm partition not accessible

I had Fedora installed on a LVM & had my /home & another file systems in it encrypted. ( i remember the passwords but forgot the cipher protocol used ) I installed Ubuntu without ...
1
vote
1answer
48 views

LUKS hdd encryption: Maximum maximum password length?

Is there any maximum lenght of the passphrase in the hardrive encryption option on ubuntu (luks)?
-1
votes
1answer
42 views

Luks Disk Encryption

I have setup disk encryption with 'LUKS' and configure it to auto mount when the system boots up. So now as it supposed, it prompts me a passphrase when the system boots up. If i enter the correct ...
0
votes
0answers
44 views

Password to unlock LUKS volume requested multiple times even after correct password is given

Please help! There is win7 on separate logical volume. Then installed Ubuntu on a encrypted LVM (it is contains of two encrypted PV's). Everything's fine, but LUKS password asked for 5-8 times when ...
2
votes
0answers
125 views

Add second disk to encrypted laptop [duplicate]

I have installed cleanly 14.04 AMD64 onto my laptop which has two (SSD) disks. I used the default install with full disk encryption option on the first disk. However I'd now like to add a second disk ...
0
votes
0answers
29 views

Unable to log in after full disk encryption + separate Encfs encryption of home directory

I followed this (german) guide to set up an encrypted ubuntu system. However I wanted to have my home directory on a separate disk and also encrypted, but using encfs. So I chose a partition on ...
0
votes
0answers
20 views

How to mount encrypted home directory in an encrypted LVM with username/password

I mounted the LVM to ~/recover The private home folder is now here ~/recover/home/eshwar$Access-Your-Private-Data.desktop I tried ecryptfs-recover-private but it appears that the login passphrase is ...
0
votes
1answer
87 views

No Swap Partition!

I'm in dire need of help. My system has become incredibly laggy and hardly usable. I have realised that this is because for some reason I'm running without virtual memory (this is not intentional). ...
0
votes
1answer
66 views

Creating a swap partition on an SSD with full encryption

Much to my surprise I recently found myself to lack a swap partition. Since (as is evident from the output of df, which I hereby repost) that I am running off a single encrypted volume, I was ...
1
vote
1answer
92 views

Dual boot w/ UEFI and LUKS - What do I need to know/do?

I want to rebuild my mobile workstation (HP EliteBook 8560w) to dual boot CentOS 6.5 and Ubuntu 14.01LTS. I would like to protect both instances with LUKS. In my research I have come across a few ...
1
vote
1answer
49 views

Encryption of hard disk [closed]

Is it possible to encrypt the hard disk without formatting in ubuntu. if yes so,please tell me with full description.
0
votes
0answers
73 views

how to decrypt a LUKS partition?

i checked the LUKS encryption while installing ubuntu 14.4. now i cant access windows partition. how can i decrypt that? i tried cryptsetup luksRemoveKey it just removed the key itself. is it even ...
0
votes
0answers
138 views

How to make luks partition auto-mounted at start-up?

What I have: 1st HDD (/dev/sda) with luks crypt partition (/dev/sda5) with LVM in it (/dev/mapper/sda5_crypt). LVM contains system root (/dev/mapper/TS1--vg-root) and swap ...
0
votes
0answers
69 views

Open multiple LUKS partitions at boot

I have a setup where I have 4 LUKS partitions that need to be mounted at boot time in order to assemble a RAID10 btrfs partition holding the root partition of my system. I was able to finalize the ...
2
votes
0answers
703 views

ubuntu 14.04 not booting, update-initramfs “nothing to do, exiting”

I did a mess while installing ubuntu 14.04 on my XPS 15 (9530 haswell) and I need help to rebuild boot partition. My computer has one miniSATA SSD 32 GB and a 1TB HDD. I crypted both with LUKS with ...
0
votes
1answer
55 views

Cannot mount partition with cryptsetup

I have a spare drive. I've attempted to format it and encrypt it. But even though the process appears to succeed and I can open the crypt, I cannot mount the newly mapped device. Here is the output of ...
2
votes
0answers
473 views

Mount LUKS encrypted hard drive at boot

I have Xubuntu 14.04 on a SSD device (the HOME was encrypted correctly during intallation), additionally I have a HDD with a encrypted partition with extra data which I would like to mount in ...
0
votes
0answers
73 views

How to fully encryped ubuntu on the Beaglebone Black

... or at least access LUKS partitions from a unencrypted system. In the past my BBB crashed during file copying on encryted SDHC that actually did mount. In the later versions from ...
0
votes
0answers
15 views

Different behavior of 2 encrypted LVMs

recently i created ext4 on top of luks on top of lvm. about 20gb. i also have similar configuration (900gb) created long time ago - i don't remember how exactly i created it. both are not mounted on ...
0
votes
0answers
97 views

cryptsetup-encrypted disks failing after restart (mb solved?)

I am using cryptsetup/luks (ETA: On 12.04) to encrypt partitions on external hard drives. Several times now, I've had disks fail to mount after an apparently normal restart (often a kernel upgrade, ...
0
votes
0answers
267 views

Unlocking Encrypted Root (LUKS on LVM) with “hidden” USB Keyfile

I have a Ubuntu Server 13.10 machine. Its root partition is encrypted with LUKS, which is then stored in a logical volume. On boot, the LV is mounted and then cryptsetup requests my passphrase; once ...
0
votes
1answer
234 views

LUKS and LVM install: no boot (gave up waiting for root device)

I just finished installing 12.04 on my system, configuring it with LUKS and LVM. I can open the encrypted position just fine in a recovery disk, but I just can't seem to get it to boot. It waits ...
1
vote
1answer
389 views

Cannot mount encrypted LUKS drive with “x-gvfs-show” option

I've used Linux Mint 16 Petra's Disks utility to format my external drive as an encrypted LUKS ext4 partition. The problem is that I can't mount it if I use the option "Show in user interface", that ...
1
vote
0answers
1k views

device-mapper: remove ioctl on luks-xxxx failed: Device or resource busy

While I was away from my computer, my encrypted USB drive got accidentally unmounted somehow (although it was still physically connected at the time). I haven't been able to recover (haven't tried a ...
2
votes
1answer
85 views

Expanding an encrypted xfs volume

I am working on expanding a currently attached volume to one of my Ubuntu Amazon AWS servers, but I am having some problems. I already created a new volume from a snapshot, then attached the newly ...
0
votes
1answer
47 views

How can I hide encrypted volumes from Unity users?

Basically I want to make sure that users cannot mount or attempt to decrypt and mount local volumes. I figured for unencrypted volumes it is sufficient to create a noauto fstab entry that points to a ...
0
votes
0answers
311 views

luksFormart error Failed to setup dm-crypt key mapping for device

I'm trying to format a disk with LUKS and when I try the command cryptsetup luksFormat /dev/loop0 I put the passphrase and then this error message appear: device-mapper: reload ioctl on failed: ...
1
vote
0answers
101 views

LUKS decryption step missing during boot after upgrade

I upgraded my 12.10 installation that was residing on an LUKS encrypted EXT4 root partition. I did that with the 13.10 Iso standard on a DVD. I booted into the Test System, successfully mounted the ...
0
votes
0answers
83 views

cryptsetup passphrase prompt disappears too quickly (LUKS)

My problem is the passphrase prompt at boot (which is set up by cryptsetup) is disappearing too quickly. During boot the passphrase prompt is displayed for about 5 seconds and then the console ...
1
vote
1answer
76 views

/etc/crypttab timout option

I have created an encrypted flash drive named 'LUKSFlash'. I have tested with the following: $ sudo cryptdisks_start LUKSFlash /dev/mapper/LUKSFlash now exists $ sudo cryptdisks_stop ...
0
votes
1answer
396 views

Terrible Luks/dm-crypt performance on 13.10 (Asus Zenbook, SSD, AES-NI supported)

I have a Laptop (Asus Zenbook UX31A) with 124GB SSD. I installed Ubuntu on a encrypted partition and started facing moments of temporary or permanent unresponsiveness. I suspected I/O and did some ...
0
votes
0answers
39 views

Lost encrpytion passphrase for external HD

So I encrypted my external HD using the "LUKS + Ext4" type on ubuntu 13.04, on this computer and on this account, a couple of weeks ago. I know the point of encryption is that you cannot retrieve the ...
0
votes
1answer
340 views

/etc/crypttab ignored on boot

I wanted to setup encryption with dm-crypt and LUKS, but I set it up manually, not during installation process (I created LUKS partition and /etc/crypttab file properly). But the encrypted partition ...
0
votes
2answers
1k views

Encrypted disk won't unlock anymore: Not authorized to perform operation (udisks-error-quark, 4)

In 2012 I used Ubuntu's gnome-disks utility to encrypt an external drive. Last year I was still being able to unlock it. But today I tried again on Ubuntu 2012.04 and gnome-disks says: Error ...
1
vote
0answers
199 views

“No key available with this passphrase”

Error unlocking /dev/sdc1: Command-line `cryptsetup luksOpen "/dev/sdc1" "luks-a4726230-7903-4378-b7bc-c87472426a5f" ' exited with non-zero exit status 2: No key available with this passphrase. This ...
2
votes
5answers
816 views

encrypted 13.10 will not reliably boot

EDIT: SOLVED! see http://askubuntu.com/a/403876/212688 i re-installed ubuntu 13.10 x64 on my vaio pro, in legacy, bios mode. the installation is lvm/luks encrypted and thus asks me for the encryption ...
1
vote
1answer
108 views

Access an encrypted drive from one to the other installation results in No key available with this passphrase"

Had a desktop and a laptop, both running Ubuntu 13.10. Decided to merge the two and plugged in laptop HD in tower's second slot. Both are seperately encrypted. Have no trouble booting one or the ...
0
votes
1answer
45 views

how to store data on a “secure” place so that nobody can access to it

I am building a "Kiosk-Computer"-Terminal for my client. At the moment the "Kiosk-Mode" is accessing into Ubuntu with the guest-user, this is enough for my costumer at the moment. ( btw. if somebody ...
0
votes
0answers
58 views

luks dev mapper

Can someone tell me why is blkid returning different results from what I can see in /dev/disk/by-uuid ? AM I missing something obvious or is this simply bug ? root@db01:~# blkid /dev/sda1: ...
1
vote
0answers
101 views

12.04, Kernel 3.2.0-55 & cryptsetup

I am running into a problem regarding the following setup: Partitions: /dev/sde1 cryptswap /dev/sde2 cryptroot |_ /dev/vg_root/lv_root / |_ /dev/vg_root/lv_usr /usr/local |_ ...
1
vote
2answers
710 views

Convert from EFI to BIOS boot

I have a Samsung Notebook NP900X4C with an LUKS encrypted installation of Linux Mint 15 on it. The system is booting in UEFI mode. The problem is that the samsung-notebook kernel module is disabled ...
1
vote
2answers
176 views

Unencrypted /boot partition can be infected from windows on dual-boot system?

I have dual-boot with windows 7 and ubuntu. /dev/sda1 ext4 (/boot) /dev/sda2 ntfs (windows partition) /dev/sda5 ext4 (root encrypted) I don't have any concern of adversaries gaining ...
-1
votes
1answer
184 views

Is LUKS key wiped out from RAM on shutdown, hibernation and suspend?

The question is basically whether Ubuntu is protected from cold boot attacks.
25
votes
0answers
985 views

How do I enable Ubuntu to suspend the machine using LUKSsuspend during sleep/hibernate

I'm on Ubuntu 14.04 using full disk encryption (LVM on top of LUKS). I would like to incorporate luksSuspend into the suspend procedure (and later use luksResume) so that I can suspend to RAM without ...
0
votes
2answers
2k views

mounting logical volume from .img containing a luks encrypted volume group

I'm having some trouble restoring a back-up I made of a encrypted filesystem. The back-up is a .img file containing a single disc partition. This partition is a luks container in which a logical ...
1
vote
1answer
2k views

Full System encryption with LUKS on headless server - unlock with dropbear and busybox. How?

I encrypted a headless server with cryptsetup/LUKS. 2 HDDs with 512 MB /boot on /dev/md0 and 1,61 TB LUKS encrypted /dev/md1 with LVM containing /, swap, and others. I installed dropbear (and busybox ...
2
votes
3answers
274 views

Home encryption [duplicate]

I have just installed fresh 13.04. I've chosen to encrypt the entire installation, but the installer later asked me whether I wanted to encrypt personal folder under /home. What should I choose?
2
votes
0answers
1k views

What is the correct way to use key file LUKS authorization?

Before filing new bug reports i decided to try to get support on my situation here. Sorry for my english (it may sound frustrating) in advance, feel free to ask about additional details and thanks!! ...
1
vote
0answers
100 views

Owner, xattr on encrypted remote backup

I am trying to configure an encrypted remote backup. My approach is to backup my data to a local drive which is encrypted using ecryptfs (mounted with mount -t ecryptfs /lower_folder /upper_folder) ...