Questions about encryption such as home folder encryption, partition encryption and file encryption.

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After upgrading of a kernel from the **3.19.0-15** to the **3.19.0-26** it shows me color lines on boot

CPU: Intel Core i7-4770. GPU: NVIDIA Corporation GK104 [GeForce GTX 760] (rev a1). Ubuntu 15.04 with LVM on LUKS: sda 8:0 0 111,8G 0 disk ├─sda1 8:1 ...
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15 views

Dual Boot fully encrypted Ubuntu with windows 10

I trying to be able to add Ubuntu to my Windows 10 laptop. I would also like for Ubuntu to be fully encrypted. My understanding is that I cannot encrypt both OSs on the same hard dive even with ...
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1answer
28 views

How Ubuntu does encrypt user's password?

How Ubuntu does encrypt user (session) password? What algorithms/mechanisms are involved in that?
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25 views

Can I mount an encrypted /home directory with automatic login?

I'm trying to encrypt some files in Ubuntu server 14.04 so that if someone boots off a live CD that can't just read the files. However I also want the server to auto-login into a whiptail menu which ...
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1answer
11 views

How secure and portable are Cryptkeeper encrypted folders?

I have some questions about Cryptkeeper. Is it safe to use Cryptkeeper for password protecting folders in ubuntu?Is there a chance that using Cryptkeeper causes data loss?(in cases other than ...
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17 views

Xubuntu 15.04 post install encryption

I have just installed Xubuntu 15.04 with /boot, /root, /home and swap all on different partitions, however the out of the box installer only gave me the option to encrypt /home. I want to encrypt ...
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19 views

Encrypted hard drive or some alternative solution

I haven't found an answer to the following. Hypothesis: If someone gets physical access to my computer, how I would make sure that they (the ones snooping around) do not find my PGP details; like ...
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8 views

Use PamUSB to decrypt disk on boot

Is it possible to to use PamUSB to decrypt the drive on boot without entering the passphrase? I'm using Ubuntu 14.04 Thank you
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13 views

Unexpected encfs+apache permission behavior

I can't write my cache file for my encrypted wiki. [root@localhost user]# namei -mo /var/www/html/decwiki2/data/cache/ f: ...
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1answer
7 views

Getting “Disk /dev/sdX doesn't contain a valid partition table” on LUKS external drive

Wanting to make sure I'm doing this right. I get the warning on both /dev/sdX and "/dev/mapper/luks-xxxx-xx. . ." when I run fdisk -l. This is what I did to encrypt it: cryptsetup -y -v luksFormat ...
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0answers
27 views

cryptsetup: cryptsetup failed, bad password or options?

today ,i installed ubuntu 14.04 on my laptop running windows 8.1 using Universal-USB-Installer-1.9.6.1.exe. When i finished the installation, i was asked to reboot. I did so but the passphrase wasn't ...
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2answers
33 views

Encrypt USB That Is Compatible With Windows

I want to encrypt a USB stick, and be able to decrypt it on Windows as well as Ubuntu. How do I do this & what programs do I need to use?
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Opening encrypted disk at boot using crypttab and decrypt_gnupg doesn't work

I have a Volume that is encrypted with a GnuPG pass phrase encrypted key. I can open it, using manual commands, like this: gpg -d key.gpg | cryptsetup luksOpen /dev/sdb2 cryptvolume This works ...
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15 views

Windows to Kubuntu migration with multiple encrypted disk

I am going to extend my system from Windows 7 x64 Pro to dual boot with Kubuntu 15.04. I am trying to figure out the migration strategy. My system has several TrueCrypt encrypted hard disks. One of ...
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1answer
76 views

What is the proper way to install Ubuntu 15.04 with LVM, LUKS, and manual partitioning?

I am trying to install Xubuntu 15.04 with LVM and LUKS, manually partitioning in order to have a separate /home partition. So far I have booted the Xubuntu live CD and went through these steps: ...
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1answer
25 views

How to separate two user's home directory in to different partition

I have /home directory in the separate partition. But, I have two users in my system. I want to create a separate partition for one of these user. Like partition1 : /home partition2 : /home/user1 ...
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5answers
51 views

How do I use KeePass app on other computer?

I generated several passwords using KeePass on one of my computers. How do I access KeePass with all my passwords on another computer?
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1answer
80 views

Revertably use computer's hard disk from portable system

Running Ubuntu from a portable medium (USB stick), I want to also be able to use the HDD of a computer, e.g. for swap and to temporarily save data. However, I want not to touch the HDD in a not ...
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27 views

Ubuntu fails to boot after deleting swap

System: Ubuntu 15.04 64 Bit (only OS on the machine, only 1 hard drive). I chose "encrypt my home folder" during the installation. In system monitor I see a swap partition available but GParted shows ...
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0answers
12 views

How does an encrypted file system stay reasonably fast?

I want to encrypt my file system and wondered can my file system stay as fast as it would be without any encryption? If so why, if not how does this affect the read/write operations?
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1answer
29 views

How do I access encrypted folders from the terminal?

I encrypted the whole hard disk (via encfs) on installation of 14.04, and I want to install an HP driver only installable from the terminal. But "cd" does not recognize any encrypted file directories, ...
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0answers
27 views

Enterprise full disk encryption solution for Linux

I have around 100 linux (Ubuntu) desktops that are connected to a Domain Controller using Centrify. I am wondering what Domain Controller based encryption solution I may use as for example FileVault ...
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2answers
36 views

Mask my Desktop for my ubuntu-based Wifi hotspot/router

I used Ubuntu to build a Wifi HotSpot. You can join the Wifi and access Internet. It is used in some area without lots of Internet access in Africa, Island and Greenland. Since we're responsible for ...
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26 views

authdaemond: pam_ecryptfs: pam_sm_authenticate: /home/user is already mounted

I just setup my new server with harddisk-encryption and now I noticed that /var/log/syslog is full of the following lines: Aug 12 19:37:35 server authdaemond: pam_ecryptfs: pam_sm_authenticate: ...
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0answers
8 views

FDE with / and /home on same partition

I installed Ubuntu 14.04.02. I wanted full disk encryption but apparently I didn't read carefully enough and now I only have my /home encrypted and my /home is on the same partition as /. Here is a ...
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15 views

LUKS encrypted: 2 keys, a passphrase and a keyfile, how to priorize keyfile?

I have installed Linux the LUKS way. I provided the passphrase. Later, I made a keyfile (with a random key) and added it to /etc/crypttab specifying its path. I get something like: # <target ...
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29 views

Portable Ubuntu with ability to create, mount and remove without traces encrypted virtual disks on any HDD

I will be on vacations and where I go, there will be a computer in my room. I don't know what type of computer, how old, what specs, nothing. But probably it will have Windows installed and probably I ...
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1answer
22 views

Slower boot after installation with encrypted home directory

I have installed Ubuntu 15.04 x64 recently. I have observed that in comparison to non-encrypted installation, the installation with encrypted home directory results in slower boot time: without ...
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1answer
79 views

Boot folder on external USB pendrive, how to boot to?

My machine is LUKS-encrypted and boot works a charm (asking the passphrase at launch). I want to use a keyfile on a USB pendrive, thus the user has a dongle that the user must plug to launch Linux ...
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1answer
21 views

How to boot into a USB and reinstall Ubuntu on Ubuntu having disk lock?

I had dual booted windows 8.1 and Ubuntu. Later i removed windows 8.1 and installed Ubuntu LTS 14.04 . While installing Ubuntu, i selected to encrypt the disk and used LVM. Now i want to reinstall ...
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0answers
7 views

Encryption suitable for version control data

I'm looking for some encryption program/command that will encrypt file system. The zip -e command is not suitable because it will change the output every time the file system is encrypted, this is not ...
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24 views

problem with ecryptfs-recover-private: mount(2) failed

I'm in the process of moving my OS and data from one drive to another within the same computer. (I got a nice, new SSD.) My old home directory had an encrypted sub directory inside, and I'd like to ...
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33 views

Running Ubuntu on SSD with native hardware encryption enabled to work for eDrive (Windows' BitLocker enabled)

I have Samsung 850 Evo. If I do a secure erase and then fresh install the Windows 10 (to enable the BitLocker to work with SSD's hardware encryption), will I able to install and use Ubuntu on it ...
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0answers
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key exchange in android app [closed]

i am new to android programming. we are working on a simple messaging application and encryption we used is Advanced encryption standard 256 by default. now i want to do the following:- How to do key ...
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0answers
19 views

boot folder on my USB pendrive

I copied my boot folder onto a USB pendrive. (My FS is LUKS encrypted, I put the keyfile on the dongle, I want the pendrive to be plugged if a user wants to use the machine) I did it: put whole ...
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10 views

Polarssl/sha1 excist failed

Running ubuntu 14.04 on virtual box. Trying to build this oonf git and I got this error when doing the 'cmake ..' command. Have already installed the libtomcrypt-dev so I do not know where this ...
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18 views

LUKS encryption + USB dongle keyfile = if not plugged, disallow passphrase prompt?

My laptop is LUKS-encrypted. I put boot & keyfile on a USB dongle: if the dongle is not plugged at boot, you cannot enter linux. But when I dont plug the USB dongle (which contain the keyfile), ...
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0answers
65 views

Truecrypt alternative with deniable encryption? [closed]

I am looking for a Truecrypt alternative for Linux, one that is preferably is free/libre/open-source software (FLOSS). I would have used Truecrypt, but it has been discontinued.
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1answer
39 views

Boot Ubuntu from Fully Encrypted USB Stick

As the title says, I would like to be able to install Ubuntu on a USB stick such that I can (a) boot from the USB stick and (b) Ubuntu uses full disk encryption. I was able to put Ubuntu on a USB ...
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2answers
66 views

Installer hangs when selecting full disk encryption

I'm doing a fresh install of Ubuntu 15.04. On the "Installation type" screen, I select "Erase disk and install Ubuntu" and then check "Encrypt the new Ubuntu installation for security", which causes ...
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Ubuntu hard disk encryption key location

I had default installation of ubuntu 15.04 with encrypted option (nothing was customized during installation) Is my encryption key stored on the hdd on some partition ? For instance, is it stored on ...
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2answers
36 views

Who do I install PHP Blenc on Ubuntu 14?

What is the easiest way to install PHP Blenc on Ubuntu 14?
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0answers
21 views

LUKS encryption, switch from passphrase to keyfile

Using LUKS encryption, I set it during the Ubuntu installation. I entered a passphrase. But now I want to use a keyfile and I dont manage to find the right process to. How can I make the switch ...
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Every other boot drive decryption doesn't work

This isn't a 50% chance of happening thing, here's a common sequence of events: Boot into grub, where I select Ubuntu Blank purple screen, type in decryption password and hope it works It does, can ...
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Help needed recovering erased boot disk label [duplicate]

I dun goof'd. Up until about an hour a I had a working installation of 14.0 on my 2013 Macbook Air, with full disk encryption as set up in the standard installation process. But tonight, in the ...
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2answers
22 views

Recovery ubuntu encrypted home

If someone gets physical access to my pc, mounts my ubuntu and changes my user password (e.g. in the shadow file). Will he be able to log into my account and decrypt my (encrypted) /home partition? ...
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1answer
30 views

How to create a snapshot of an encrypted btrfs @home subvolume?

We are using btrfs for its snapshot capabilities so we can backup user home directories. The user home directories are encrypted with encryptfs. We run sudo btrfs subvolume snapshot /home ...
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1answer
73 views

LUKS encryption, header on a dongle USBdrive?

I am going to install Linux the LUKS/LVM way, in order to have an encrypted disk. In addition, I would like to put the header and passphrase in a USB Key. Thus, instead of entering the passphrase, I ...
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18 views

Deleted Kernels from Full Disk Encrypted Ubuntu 14.04 with home directory encryption - help?

I have an Ubuntu 14.04 OS on which I enabled full-disk encryption and home directory encryption. In the process of updating Ubuntu my boot folder was too full to update so I ran a command I thought ...
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24 views

Full disk encryption without enabiling LVM

Currently I am building an image to deploy with a fog server (used to deploy images over a network). I am using Ubuntu trusty and am required to have full disk encryption on the machines. The issue ...