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Questions tagged [encryption]

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

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Trying to add PPA repo, stuck at GPG decryption

First off, it should be out there that there are no docs. you basically have to figure everything out yourself. And the little info there is is convoluted, cryptic. basically lazy. I want to add ...
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Using veracrypt for Ubuntu installed on Nexus 7

I know that it's possible to install Ubuntu on Nexus 7 , but does it mean that I can encrypt my data with veracrypt that I can install on this device ?
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How to copy with scp many files but ask passphrase only once? [duplicate]

I need to write bash script with many copying files to remote server and in back direction. I am using ssh keys, stored locally in .shh and allowed on server. I try this scp user@ip:/site/{conf1,...
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1answer
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Unravelling gnupg_keyinfo()'s output

I am trying to write server and client PHP-CLI scripts with gpg-encrypted data using PHP's gnupg_* extensions on Ubuntu-18.04 and PHP-7.2. After sending the welcome message, the server sends its ...
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33 views

Encryption using ecryptfs

I'm running Kubuntu 18.04. I installed ecryptfs but Private folder is not encrypted. I ran... sudo apt-get install ecryptfs-utils Then I ran... ecryptfs-setup-private The terminal output looked like ...
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Dell XPS 15 9570 not booting when using encrypted disk

After installing Ubuntu 18.10 with encrypted disk on a Dell XPS 15 9570. It will not boot, but show error screen. It does work correctly if there is no encryption. This is actually also reproducible ...
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1answer
50 views

encrypted drive cloning - expanding partitions problem

I'm trying to clone my SDD to a larger device so I will have a bootable backup in anticipation of doing a system upgrade on several desktop clients. I also want to model a known-correct procedure to ...
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Encrypting virtual machines

I am pretty new into virtualization with KVM/QEMU and I have a security question. Which is the best way to encrypt virtual machines? Back when I was using windows, I enforced bitlocker on every drive ...
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30 views

How do I digitally sign PDF's in 2019

I know this question has been asked a few different times but the answers either point to dead software or are not 100% applicable. Lots of the software mentioned here is dead. I want to take a pdf ...
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1answer
49 views

Why can't I get the man page of the crypt function?

On my Fedora system, I can do man 3 crypt and I see the man page of the crypt function. However, when I do the same on Ubuntu it gives me: No manual entry for crypt in section 3 I know that it has ...
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Preseeding No physical volume defined in volume group

A couple of weeks ago I asked about configuring Ubuntu preseed to configure LVM partitions. I got no response to that one. I was able to figure out how to get logical volumes defined for UEFI within ...
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1answer
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Setting correct size for “cryptsetup: WARNING: Option 'size' missing in crypttab for plain dm-crypt mapping root” message

I have a full disk encryption using ecryptfs, after upgrading to 18.10 a warning message started to appearing at boot: cryptsetup: WARNING: Option 'size' missing in crypttab for plain dm-crypt ...
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1answer
105 views

Partitioning after install

Current Partion Layout 1TB HDD - /dev/sda1 80GB Windows 10 - /dev/sda2 ~1GB Microsoft reserved - Free space 128GB SSD - EFI Boot - Ubuntu - Windows Recovery I want to move home to a partitioning ...
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Ubuntu freezes on Surface Pro 5

I installed Ubuntu 18.10 on my new surface pro 2017. To not change anythings on the internal storage, I put Linux on the Samsung micro SD card of 128GB class 10 U3, and to prevent any data leak, I ...
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How to adjust screen backlight at full disk decryption step

I have a MacBook Pro 11,1 on which I dual-boot Ubuntu 18.04 with full-disk encryption. When prompted to enter my password at the decryption step the screen backlight is turned almost all the way down, ...
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1answer
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Can not de-crypt files after upgrading to latest Ubuntu version

Encrypting files in an older version of Ubuntu with: openssl des3 -e Trying to decrypt files with: openssl des3 -d does not work in the newer Ubuntu version "18.04.1 LTS"
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Ubuntu on an encrypted microsd on a Surface pro

I got a surface pro 5 (2017) with core i5-7300u, 8GB ram and 128 ssd with Windows 10 pro and the bitlocker encryption of full ssd. To do not touch any of that, I bought a samsung 128 GB micro sd card (...
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1answer
34 views

Not sure of /etc/crypttab entry on Ubuntu 18.04

I have been following the following guides: http://www.cim.mcgill.ca/~anqixu/blog/index.php/2018/06/20/install-18-04-on-encrypted-partitions-xps15-cuda/ How can I install Ubuntu encrypted with LUKS ...
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1answer
53 views

ecryptfs error recovering encrypted home folder

I'm dual booting windows and ubuntu. Apparently I encrypted my home folder when I installed ubuntu, though I don't remember choosing that. I tried to access files on the ubuntu partition while running ...
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How do I change the default message digest in openssl 1.1.0

EDIT: I have a file that was encrypted with openssl 1.0.1g. When it was encrypted, the default_md was md5. How can I set openssl 1.1.0 to use default_md to md5 when executing commands in user mode? ...
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66 views

Automation install ubuntu 18.04 to crypt disk don't work

I'm trying to do an automatic installation of Ubuntu 18.04 and encrypt a partition. I have this preseed: d-i partman-auto/method string crypto d-i partman-lvm/device_remove_lvm boolean true d-i ...
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1answer
66 views

Prompted for LUKS password twice on boot despite separate, unencrypted boot partition?

Key Details My GPT layout drive has the following partition layout: /dev/sda---| |sda1 - Windows Recovery Partition |sda2 - EFI Partition (Shared, Windows and Linux) ...
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How to make cryptsetup abandon a drive once password limit is reached?

I would like to set up my encrypted root partition so that it can decrypt automatically if my USB flash drive with a keyfile is present, but ask for a password otherwise. There is one thing preventing ...
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1answer
57 views

Unit -.mount mount does not exist, proceeding anyway

I installed fresh Xubuntu using this link because I needed my disc encrypted. After installation, when I tried to run gparted, I had errors which I partly fixed by reinstalling some libraries. Now ...
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ManualFullSystemEncryption 18.04 - secure boot

I have followed the excellent dual boot FullSystemEncryption Manual where a bug is mentioned that the BIOS secure boot might need to be turned off before installing. After the successful installation ...
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0answers
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Ubuntu 18.04 Encrypted External USB Drive

I recently updated from 64-bit 16.04 to 64-bit 18.04 on my laptop with an internal hard drive. I use a encrypted external hard drive for routine backups but when I enter the password to decrypt the ...
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1answer
26 views

Increased encrypted partition size but Gnome Files still thinks it's small

I have an installation of Ubuntu Desktop 18.04.1 running in VirtualBox 5.2.20. When I first installed it, I made the mistake of giving the VDI a capacity of only 20 GB. That filled up fairly quickly, ...
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1answer
49 views

LUKS encrypted HD opens with 1 click in Files - can this be scripted?

One of my internal harddisks is encrypted with LUKS and used for backups only. I have an entry in fstab with the noauto option. After login I can decrypt and mount this volume with one click in the ...
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21 views

Can't find lvm inside luks decrypted partition

I did a space liberating operation from "bleachbit as sudo" in my HDD which has an Ubuntu 18.04 installation and the root partition is luks encrypted, and the next time I booted up my machine it ...
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2answers
1k views

security - is this my public key? my private key? or the keys of the program I'm using?

I asked a recent, separate Ask Ubuntu question with the following in the body: W: An error occurred during the signature verification. The repository is not updated and the previous index files will ...
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How to migrate existing ext4 partitions to another drive with encrypted partitions

So i have an SSD with the following partitions: 1. fat32 - /boot/efi - 190MB boot,esp 2. ext4 / 65.19 GB 3. linux-swap 1.40Gb 4. ext4 /home 398.98 Gb I bought a new SSD and would like to clone ...
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2answers
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How to repair encryption failure?

I use an encrypted external USB Hard Drive for storage. My PC no longer asks for a passphrase to open the Drive after a reboot or unplugging/replugging the USB cable. The Hard Drive just opens like an ...
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1answer
66 views

Mounting all partitions in a disk image

Trying to mount all partitions of a disk image. I can only mount the first partition, but unable to mount the other 2 partitions. userone@desktop:/media/userone/BACKUP$ sudo fdisk -lu 16-04-desktop....
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1answer
1k views

Ubuntu encrypted hard drive - possible to crack? [closed]

I'm using Ubuntu 18.04 on my laptop. If someone would steal my laptop, would it be possible for them to access my data stored on the laptop? Could any of them access my data, not just random people ...
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2answers
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How do I copy an encrypted DVD in Ubuntu 16.04?

I have tried several programs such as Brassero to copy an encrypted DVD but without success. I tried to install libdvdcss but was unable to do it (key not found?). What version of libdvdcss do I ...
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Disk encryption with partitions in Ubuntu's installation

I got this problem in my Dell G7 that I can only install Ubuntu if I choose to encrypt the system (don't know why too), and I'm fine with it, but I want to install it encrypted in a partition, not in ...
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1answer
33 views

Encrypted LVM with custom partition table

Why does the Ubuntu installer not offer a way to create a custom partition table for an encrypted LVM installation? I wish to have at least /, /home, and data partitions and a swap. I used to also ...
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66 views

encrypted home directory can access but not see files

I have an encrypted volume and encrypted home directory on Ubuntu 16.04. About a week ago I noticed I could not see any files in my home directory. Oddly enough I can however access files I knew ...
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1answer
179 views

Permission denied (publickey) after every time being disconnected

After getting disconnected from the server (Ubuntu 18.04.1) I can not login anymore using public key. I have 2 accounts that can run sudo. One account uses public key and a passphrase to login, and ...
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How to encrypt a non home directory with SSH public key [duplicate]

How do I encrypt a non home directory like /backups/secret/ with my SSH public key on 16.04?
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27 views

GPA is returning error after upgrade from 16.04LTS to 18.10

I've used GPA (GNU Privacy Assistant) successfully for years starting from 12.10 to 16.04LTS. Yesterday I made update to 18.04LTS and then to 18.10 and find that it cannot encrypt or decrypt any file ...
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2answers
550 views

Grub looking for an encrypted root UUID before the container decryption

I was cleaning Ubuntu 18.10 with bleachbit when my PC froze. When rebooting, I was stucked after Grub at BusyBox (initramfs). When exiting BusyBox, I get the message: ALERT! UUID=f6fc1852-25c6-47a6-...
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28 views

Using nvidia driver combined with encrypted system drive in Ubuntu 18.04

I want to use the proprietary nvidia driver under Ubuntu 18.04 with an encrypted system drive. When I install the nvidia driver (version 390.77) using the Software & Updates menu no error is ...
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1answer
71 views

Encrypting Linux server for remote access VM

Use Case I have an Ubuntu server machine wrapped in a VM (vmdk file) that contains web application. I want to send this VM to someone and prevent him from accessing to the internal file system of the ...
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1answer
35 views

Recovery crypt password

I remove crypt password using "sudo cryptsetup luksRemoveKey /dev/sda5". Now after restarting it is asking for crypt password again, and it is not accepting the old password. Now I have no idea about ...
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Recovering Data from Cryto Luks Partition Backup

does anyone know of a way to recover the files from a crypto-luks drive? I had an old laptop which had a full crypto-luks encryption on it which broke down around 6 months ago. See the link for my ...
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Ubuntu 1804 full disk encryption and added RU language can't enter password on startup

I have a problem with encryption. I installed ubuntu 1804 with full disk encryption. Then I added RU language as additional language to type. I moved it to be first. Few days ago I could not enter ...
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Another Dual Boot Encryption Question for you to read

So i have 3 SSDs in my laptop. 2 m2.ssd (A,B) and one normal ssd used for storage(C) lets call them A, B and C I SSD B already has windows 10 pro installed without bitlocker. I removed all SSDs ...
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76 views

Multiple hard drive full disk encryption

I'm trying to achieve full disk encryption using LUKS on both internal hard drivers but during boot system asks for passphrase multiple times. I also tried key file method but initramfs cant find this ...
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2answers
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gpg decrypts files without asking for password

I run gpg -c file. It asks for a password (twice) and creates an encrypted file. So far so good. When I run gpg file.gpg to decrypt the file it decrypts it without asking for the password ! needless ...