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

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103
votes
1answer
5k 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 ...
78
votes
5answers
49k 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?
76
votes
7answers
35k 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 ...
62
votes
6answers
8k 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 ...
59
votes
5answers
87k 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 / ...
54
votes
4answers
89k 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?
50
votes
15answers
27k 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 ...
46
votes
8answers
46k views

Is there a tool to encrypt a file or directory?

What's the most popular way to encrypt individual files or folders?
37
votes
2answers
50k views

Create encrypted (password protected) zip file

How do I create an encrypted (password protected) zip file?
32
votes
7answers
69k 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 ...
32
votes
9answers
14k views

How can I encrypt data in Ubuntu One or 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 ...
31
votes
2answers
48k 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. What is this? Is this is an error?
29
votes
7answers
5k 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. ...
27
votes
6answers
15k 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 ...
24
votes
4answers
14k 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 ...
23
votes
5answers
19k 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. ...
22
votes
2answers
12k 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?
21
votes
4answers
51k 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, ...
20
votes
1answer
40k 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 ...
18
votes
3answers
18k 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.
18
votes
3answers
50k 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?
18
votes
2answers
19k views

Mount a LUKS partition at boot

I have installed an Ubuntu machine with two encrypted LUKS partitions: one for / and one for /home. I've reinstalled the machine to upgrade to 10.04. Again, the / is installed using LUKS, and I'm ...
17
votes
2answers
21k 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 ...
16
votes
4answers
11k views

How do I recover my data from an encrypted home directory?

I have a big problem. When I made a upgrade from 10.10 to 11.04 I lost all my data in home directory. I have only data from my home encrypted directory. What can I do? Thanks Martin
16
votes
1answer
6k 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?
16
votes
4answers
3k 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?
16
votes
7answers
13k views

After new Ubuntu 15.04 installation, startup asks for password even though no disk encryption was set up

I installed a brand new SSD into my laptop and did a fresh install of Ubuntu 15.04, with NO system encryption used (only Home directory encryption). However, it still asks me for a password when ...
15
votes
3answers
24k views

How to configure LVM & LUKS to autodecrypt partition?

I have recently installed ubuntu server 11.04 with the full lvm encryption(installed from the setup) . I wish now to use a key file to do automatic unlock. I have tried to follow this guide ...
15
votes
3answers
6k views

Reinstall Ubuntu with encrypted home directory?

I have Ubuntu 10.04 installed with encrypted home directory. /home is on a a separate partition. Can I just boot from a 10.10 CD, reformat / and install as usual? Should it work if I use the same ...
15
votes
2answers
30k 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 ...
15
votes
2answers
6k views

Ubuntu One Encryption?

I have two questions... Firstly, is the communication between my Ubuntu desktop and the Ubuntu One cloud encrypted? Secondly, are the files, media etc. stored on my Ubuntu one account encrypted on ...
15
votes
1answer
7k views

New encryption feature in Ubuntu 12.10: home encryption or full disk encryption? or both?

How do I correctly encrypt the entire partition when installing Ubuntu 12.10? I ask because the new Ubuntu installer now shows two encryption options. After choosing "Encrypt the new Ubuntu ...
14
votes
2answers
844 views

How to sign files with Ubuntu command-line tools and my own keys?

I want to sign some Python code files I wrote, because they are plug-in modules for one of my projects. For distributing it, I want that the user can be sure a plug-in is verified and safe (because ...
14
votes
4answers
17k views

Use (Windows) BitLocker-encrypted drive on Ubuntu 14.04 LTS

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 ...
14
votes
4answers
15k 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 ...
14
votes
1answer
14k 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 ...
14
votes
4answers
18k 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 ...
13
votes
8answers
11k 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 ...
12
votes
4answers
36k views

How to change the password of an encrypted LVM system (done with the alternate Installation)?

I installed Ubuntu 11.10 with the alternate CD and encrypted the whole system (except boot) with the encrypted LVM. Everything works great as before, but I would like to change the password of the ...
12
votes
2answers
3k views

How can I determine if just the .private folder is encrypted or the whole home directory?

How can i determine if just the .private folder is encrypted or the whole home directory?
12
votes
4answers
6k views

How can I do individual file encryption on Dropbox? [duplicate]

I'd like to set a single directory inside Dropbox in which files are encrypted on a file-by-file basis. At the moment, I use a 2Mb Truecrypt container inside my Dropbox which I then have to mount ...
12
votes
3answers
5k views

Where do applications typically store data?

I was wondering if there was a standard location for storing user level application data. What I mean by that is stuff like Firefox bookmarks, Skype message history/password, etc. I'm asking because I ...
12
votes
1answer
7k views

Encrypted Home… Forgotten Password, but no Passphrase

I am using a cloned hard drive in attempts to restore some old files. The cloned drive has 2 users, one with an encrypted home drive, one without. Both are administrators. When I couldn't get into ...
12
votes
2answers
3k views

Encrypt home drive after installation

I declined to encrypt to my home drive whilst installing ubuntu. Is it possible to encrypt it after installation? if so, how?
12
votes
3answers
2k views

Suspend to RAM and encrypted partitions

Normally I don't shutdown my notebook any more in favour of using suspend-to-RAM. The downside is that my encrypted home partition is completely accessible after resume without entering the ...
11
votes
3answers
2k views

Is the swap partition encrypted?

Selecting the encryption option at install time to encrypt the home partition. Does this enable encryption of the swap partition or is the swap partition unencrypted. If the swap partition is ...
11
votes
4answers
32k 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 ...
11
votes
1answer
3k views

Find Randomart of existing ssh key

I created an ssh key with ssh-keygen, and I got this output as a result: The key fingerprint is: 84:21:3d:ab:d5:5e:05:a0:b6:ab:0f:33:af:3b:3b:82 cidr@randombox The key's randomart image is: +--[ RSA ...
11
votes
2answers
11k 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 ...
11
votes
2answers
3k views

Which algorithm does “encrypt home directory” use?

When encrypting a user's home directory, either during the install procedure or later using ecryptfs-migrate-home, what encryption algorithm / key size is used by default?