Questions tagged [encryption]

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

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208 votes
8 answers
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Create encrypted (password protected) zip file

How do I create an encrypted (password protected) zip file?
David Oneill's user avatar
  • 12.1k
155 votes
14 answers
463k views

Mount encrypted volumes from command line?

If I have an encrypted external disk (or an internal disk that is not in fstab), I see an entry for it in Nautilus -- with an entry like "X GB Encrypted Volume". I can click on this volume, and am ...
cha's user avatar
  • 2,053
119 votes
10 answers
73k views

How to stop using built-in home directory encryption?

I have a new Ubuntu 10.04 installation with encrypted home directory (using the built-in encryption offered by Ubuntu installer). What's the easiest way to stop using encryption? (I.e., to decrypt ...
Jonik's user avatar
  • 7,178
107 votes
5 answers
88k views

When installing I'm given the option of encrypting my home folder -- what does this do?

Does encrypting my home folder make my computer more secure? Do I have to enter my password more if my home folder is encrypted? What else should I know about encrypting my home folder?
David Siegel's user avatar
  • 8,922
104 votes
2 answers
7k views

How do I enable Ubuntu (using full disk encryption) to call LUKSsupend before sleeping/suspending to RAM?

This question is related to another one by @Stefan, but it is not a duplicate of it. The questions are slightly different: the author simply wanted to know if this had been implemented, while I'm ...
Jonas Malaco's user avatar
  • 1,453
100 votes
7 answers
194k views

How to change the password of an encrypted LVM system (previously alternate Installation, now advanced feature)?

I installed Ubuntu 11.10 with the alternate CD and encrypted the whole system (except boot) with the encrypted LVM. Update 2020: Encrypted LVM can be selected at the Installation type step of the ...
Filbuntu's user avatar
  • 13k
98 votes
8 answers
177k views

How to encrypt individual folders?

Let's say that I have a folder, within my Documents folder, that has files I want no one to access without a password. Is there a way to lock down that folder so that it's password protected / ...
Gonzoza's user avatar
  • 2,498
97 votes
6 answers
277k views

Enable disk encryption after installation

I'm running 13.10 Saucy. If I didn't enable disk encryption during installation, is there any way to enable it post facto? I found this, which says that encryption has to happen at install time, ...
Isaac Dontje Lindell's user avatar
95 votes
7 answers
263k views

How do I quickly encrypt a file with AES?

I want to encrypt a file using AES-256. How can I do that quickly and easily, and how can I - or someone else -decrypt it again?
Stefano Palazzo's user avatar
81 votes
5 answers
115k views

How to use https with apt-get?

Does apt-get use https or any kind of encryption? Is there a way to configure it to use it?
Strapakowsky's user avatar
  • 11.9k
73 votes
7 answers
14k views

How to secure my laptop so that hacking by physical access is not possible?

I messed up my system earlier, I was greeted with a black screen, when booting in to Ubuntu. When I started up my laptop, I selected the recovery option from the grub menu, and chose fallback at root ...
blade19899's user avatar
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69 votes
7 answers
73k views

Is there a tool to encrypt a file or directory?

What's the most popular way to encrypt individual files or folders?
user avatar
67 votes
4 answers
60k views

How to Encrypt /home on Ubuntu 18.04?

Disappointed to see that the 18.04 installer no longer offers the option to encrypt the home directory. According to this bug report referenced in the installer, the recommended method for encryption ...
elight24's user avatar
  • 671
63 votes
15 answers
41k views

How can I easily encrypt a file?

Is there any simple (IE: right click in Nautilus) way to password protect a particular folder/file in Ubuntu? I've got a few files containing sensitive info and I'd much prefer that if/when I leave my ...
Dante Ashton's user avatar
  • 5,505
61 votes
6 answers
58k views

Is there a tool that can add a password to a PDF file?

I've found lots of info on decrypting PDF files, but none on encrypting them. What tool can do this for me? Edit: There are two good answers below, but in my specific case the PDF was a scan, not a ...
mfisch's user avatar
  • 3,643
61 votes
2 answers
77k views

How to encrypt external devices?

I've been a Windows power user/administrator and professional tech for years, I just made the decision to go Linux, and wow, what a difference. Is there any decently easy way to encrypt external ...
user307939's user avatar
58 votes
6 answers
231k views

Can I disable full-disk encryption?

I recently installed Ubuntu 12.10 and it requires a passphrase to boot up (I installed it with an encrypted file system). Do I have to reinstall to change to a standard unencrypted file system?
Zzealdor's user avatar
  • 583
54 votes
4 answers
67k views

How do I mount an encrypted /home directory on another Ubuntu machine?

I've done something a bit, well, strange. I installed Ubuntu 12.04 directly onto a USB thumb stick, encrypting the /home directory as given the option during the install. The filesystem is btrfs, I ...
Naftuli Kay's user avatar
  • 4,226
54 votes
2 answers
67k views

How to check if your home folder and swap partition are encrypted using terminal? [duplicate]

I installed Ubuntu 12.04 a few days ago but strangely I seem to have skipped the part about choosing to encrypt home folder. Now if it is encrypted I do not know what is the encryption key. How do I ...
Neptunno's user avatar
  • 2,214
54 votes
6 answers
165k views

Use (Windows) BitLocker-encrypted drive on Ubuntu

How could I mount my BitLocker encrypted drive on Ubuntu? I have checked the Wine website, and it had no BitLocker support, and I have no idea how to install Dislocker on my computer. I can not ...
Neugdae's user avatar
  • 665
51 votes
6 answers
113k views

Ubuntu 22.04 SSH the RSA key isn't working since upgrading from 20.04

Up until last week I was running Ubuntu 20.04 happily, and then over the weekend decided to back everything up and install 22.04. I've had a couple of teething issues which I've solver, however I'm ...
Colin's user avatar
  • 1,048
51 votes
3 answers
95k views

Check if partition is encrypted

How do I check if a partition is encrypted? In particular I would like to know how I check if /home and swap is encrypted.
N.N.'s user avatar
  • 18.2k
51 votes
2 answers
69k views

How should I change encryption according to *** WARNING : deprecated key derivation used

When I encrypt or decrypt a file I get: *** WARNING : deprecated key derivation used. Using -iter or -pbkdf2 would be better. I do not understand what this means, and how I should change my ...
Tommy Pollák's user avatar
48 votes
5 answers
82k views

Encrypt tar.gz file on create

I have a script which creates a nightly backup of several directories. It is created using tar -czf, and the destination tar.gz file path is on a mounted network directory. The resulting file is ...
Joel L's user avatar
  • 581
48 votes
4 answers
123k views

How secure is an encrypted LUKS filesystem?

I recently installed 11.10 on a fresh disk using entire disk encryption. Can someone tell me how secure the encryption algorithm is? Has there been any recent breaches with said algorithm? I use a ...
browep's user avatar
  • 748
45 votes
2 answers
110k views

What are the advantages/disadvantages of the new encryption feature in ubuntu 13.10

I'm in the middle of installing 13.10 and the Ubuntu page I was following on how to install from a USB stick says nothing about these two choices (on the Installation type screen): 1) Encrypt the ...
user250093's user avatar
43 votes
7 answers
27k views

Increase Swap in Ubuntu 18.04 Under Lvm and Encrypted File System

I did a clean install of Ubuntu 18.04 Desktop. I used the graphical installer and chose "Encrypt the new Ubuntu installation for security". It used by default LVM and created a partition for the ...
leviatan89's user avatar
40 votes
9 answers
18k views

How can I encrypt data in cloud storage services like Dropbox?

I'd love to use Ubuntu One or Dropbox features, like file storage and so on, but I don't want anyone else to access my data, USA Patriot act etc.. I want things to be encrypted so that the only place ...
Svjatoslav's user avatar
39 votes
2 answers
71k views

What to do about "the disk drive for /dev/mapper/cryptswap1 is not ready yet or not present"?

While booting Ubuntu 12.04, the disk drive for /dev/mapper/cryptswap1 is not ready yet or not present is showing. Why is this?
bittu's user avatar
  • 391
38 votes
4 answers
38k views

What is the performance overhead of encrypted /home?

I have a netbook with Windows on the second partition and Xubuntu (/ and /home) on the third partition. I selected to encrypt my home folder during installation. The performance of the netbook is ...
SabreWolfy's user avatar
34 votes
4 answers
50k views

Encrypted custom install

My computer runs Ubuntu. I want to install Ubuntu on another medium. I wish to enable encryption, yet as the ubuntu installer's default choices (erase/alongside/etc...) only concerns the default drive,...
Yvain's user avatar
  • 544
34 votes
4 answers
45k views

Yubikey Two-factor Authentication Full-disk Encryption via LUKS

I recently acquired a Yubikey Neo - a nifty little hardware second factor authentication device. It's primarily intended for use with One Time Passwords, and the emerging U2F protocol - but since ...
seanlano's user avatar
  • 2,986
33 votes
9 answers
13k views

encrypting text editor

Is there an encrypting text editor for ubuntu? In other words, the text editor, preferably GUI capable, should always save an encrypted file and always prompt for the password to re-open the file. ...
H2ONaCl's user avatar
  • 9,673
33 votes
5 answers
44k views

EncFs insecure, what to use now

I love encfs as it provides file-based encrypting which is quite useful when it comes to cloud storage. But it looks like that especially for this use case, encfs is considered to be insecure. I'm ...
Sebastian's user avatar
  • 604
33 votes
1 answer
70k views

Can you unencrypt / remove encryption from a user home folder? [duplicate]

Possible Duplicate: How to stop using built-in home directory encryption? During installation I have chosen to encrypt my user's home folder. Can I un-encrypt it? How would I do that? I just ...
Bruno Pereira's user avatar
33 votes
5 answers
133k views

Ubuntu won't boot because of lvmetad

I've followed this tutorial to install Ubuntu 15.10: https://web.archive.org/web/20180530122126/http://thesimplecomputer.info/full-disk-encryption-with-ubuntu After restarting my computer I got to ...
Mac Dre's user avatar
  • 331
31 votes
8 answers
50k views

How to create an encrypted partition?

I am trying to create an encrypted partition, and while I format it I get the option to choose the partition type (fat/ext2/ext3/ext4/xfs/reiserfs/minix/ntfs). Is there any benefit of choosing one ...
david25's user avatar
  • 2,207
30 votes
2 answers
35k views

How do I setup an encrypted swap file?

When I installed Ubuntu, I setup an encrypted home partition. Now I have come to an issue where I am running out of memory because I haven't setup swap. How can I setup an encrypted swap file? A ...
liamzebedee's user avatar
30 votes
1 answer
77k views

What is "/dev/mapper/ubuntu--vg--root"?

I installed Ubuntu 14.04 recently. During the installation I did not create a separate partition for my home folder. I also accidentally encrypted my home folder. When i did sudo df I got the ...
user avatar
29 votes
3 answers
72k 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 /mnt/hdd....
zeugor's user avatar
  • 503
28 votes
5 answers
152k views

"Structure needs cleaning" error - cannot mount partition

I have a LUKS/LVM volume that was unfortunately removed without being correctly unmounted. I made a dd backup of my entire encrypted Ubuntu 16.04 installation. Then fresh installation of different ...
in2deep's user avatar
  • 411
28 votes
1 answer
14k views

Will changing password re-encrypt my home directory?

I need to change my user password. Do I need to take any extra steps for my encrypted home directory to become inaccessible with my old password and only accessible with my new password?
Septagram's user avatar
  • 1,067
28 votes
2 answers
2k views

How to set up a system for UK medical practise

I am a full-time UK doctor and I am not a computer expert but I do like to be in control – and so I have spent some time researching how to do this, keeping notes as I did so I can do it again if ...
Will's user avatar
  • 2,282
28 votes
5 answers
28k views

Swap not working on clean 14.04 install using encrypted home

Update 3: I decided to reinstall the system from scratch to remove any old cruft lying around since I had been experiencing some other issues after the upgrade aswell. Howver, this issue persisted. ...
ajn's user avatar
  • 495
28 votes
2 answers
50k views

How do I automatically decrypt an encrypted filesystem on the next reboot?

Goal I am looking for non interactive way to decrypt a root file partition and a swap partition encrypted with LUKS the next time the system reboots. As well as this, I need a way to undo it after the ...
Tobias's user avatar
  • 1,608
27 votes
4 answers
45k views

What is the recommended way to use VeraCrypt in Ubuntu?

I have a number of encrypted volumes on external media encrypted either with TrueCrypt or VeraCrypt. What is the recommended way to install and use VeraCrypt under Ubuntu?
Pawel Debski's user avatar
  • 2,694
27 votes
3 answers
5k views

using locate on an encrypted partition

I selected /home/ to be encrypted when I was installing Ubuntu. Now, is it possible to make locate work with an encrypted partition like this?
m33lky's user avatar
  • 873
27 votes
7 answers
16k views

How to encrypt external devices using a cross-platform solution?

How can I encrypt an external device (i.e. USB keys, external hard-drives, memory sticks, etc.) so that it would subsequently be readable/writable on any computer that I plug it in? For instance, it ...
Ondrej Sotolar's user avatar
27 votes
7 answers
9k views

How do I digitally sign PDFs in 2019?

This older post is either pointing to mostly dead software or the answers are not fully applicable. I want to take a PDF document, stick in an image of my signature and have this be digitally signed ...
RedM's user avatar
  • 393
26 votes
2 answers
8k views

Can root see my encrypted /home folder?

Just wondering if I use ecryptfs to encrypt my /home folder sudo ecryptfs-migrate-home -u username Can another user with root privilege change my password, then login my account using the new ...
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