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

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63
votes
4answers
30k 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?
61
votes
5answers
25k 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 ...
47
votes
0answers
2k 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 ...
42
votes
5answers
48k 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?
38
votes
5answers
53k views

Is there a way to password protect 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 / ...
29
votes
8answers
22k views

Is there a tool to encrypt a file or directory?

What's the most popular way to do that?
29
votes
8answers
12k 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 ...
27
votes
5answers
3k 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. ...
23
votes
3answers
23k views

Create encrypted (password protected) zip file

How do I create an encrypted (password protected) zip file?
21
votes
5answers
5k 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 ...
19
votes
2answers
23k 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?
19
votes
4answers
9k 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 ...
18
votes
1answer
26k 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 ...
16
votes
4answers
7k 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
15
votes
3answers
4k views

Reinstall Ubuntu with encrypted home directory?

I have Ubuntu 10.04 installed with encrypted home directory. /home is on a aseparate partition. Can I just boot from 10.10 cd, reformat '/' and install as usual? I think it should work if I use the ...
15
votes
4answers
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 ...
14
votes
1answer
6k 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 ...
13
votes
1answer
4k 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?
12
votes
4answers
5k 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
2answers
12k 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 ...
12
votes
3answers
2k 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?
12
votes
4answers
20k 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, ...
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
2answers
13k 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 ...
11
votes
2answers
2k 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?
11
votes
3answers
9k 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.
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
2answers
2k views

How do I recover data from an encrypted Home directory

I opted to encrypt my Home during install, and now I would like to access my data from a LiveCD, unfortunately I'm having trouble following these instructions. I get the error "mounting eCryptfs: [-2] ...
10
votes
9answers
678 views

What's the best way to store a passphrase?

I've recently enabled Ubuntu's encrypted /home/ directory features and I was asked to remember a passphrase in case I would need to recover the data manually. What is the best way to store this ...
10
votes
2answers
5k 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?
10
votes
3answers
3k 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 ...
10
votes
2answers
2k 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?
10
votes
6answers
26k 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 ...
10
votes
1answer
803 views

Where is the per-user salt kept?

Where does Ubuntu keep the password salt for each user?
10
votes
3answers
17k 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?
10
votes
2answers
937 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 ...
9
votes
3answers
5k views

How can I read every DVD, even if encrypted by CSS or other?

I sometimes want to use my computer as a DVD-player. Unfortunately I know that I will often have to cope with encrypted DVDs, for example with CSS. Therefore I installed the libdvdcss2 library from ...
9
votes
2answers
13k 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 ...
9
votes
1answer
4k 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 ...
9
votes
1answer
321 views

Where are decrypted files stored during runtime?

I wonder where does Ubuntu/eCryptfs store decrypted files from encrypted $HOME directory during runtime. Does it decrypt files just-in-time and store them only in RAM? What about large files (e.g. ...
9
votes
2answers
4k views

How can I disable Hibernate completely in Kubuntu?

I have seen the answer on How to disable hibernating?, but I have no such file. Possibly because that suggestion was written for Ubuntu, not Kubuntu (KDE, not Gnome). I do not have a swap on my ...
9
votes
2answers
1k views

use ecryptfs for Ubuntu One with an already encrypted home directory

I'd like the idea of having one encrypted folder on Ubuntu One. There are current howtos in the Internet how to set it up with EncFS or ecryptfs. I'd like to use ecryptfs - not because of speed as ...
9
votes
0answers
1k views

How do I disable the Home encryption offered during install? [duplicate]

Possible Duplicate: How to stop using built-in home directory encryption? During install I ticked the box to enable encryption for my Home directory. I'm concerned that it is effecting ...
8
votes
2answers
10k views

TRIM on an encrypted SSD

wiki.ubuntuusers.de says if I want to use TRIM on an encrypted SSD, I need at least cryptsetup 1.4 and kernel 3.1. Do I need this, when creating the partitions and setting up encryption, or is ...
8
votes
4answers
6k views

Securely automount encrypted drive at user login

An encrypted /home directory gets mounted automatically for me when I log in. I have a second internal hard drive that I've formatted and encrypted with Disk Utility. I want it to be automatically ...
8
votes
3answers
13k views

How to disable cryptswap?

How can I disable cryptswap? I would like an unencrypted swap like before. This is on an ubuntu 9.10 system.
8
votes
2answers
193 views

Why am I given the option to also encrypt my home folder after I've selected system encryption?

I am installing Ubuntu 13 with full encryption but why am I given the option to also encrypt my home folder. Surely the home folder is covered under the system encryption? I'm confused.
8
votes
2answers
6k views

How do I create an encrypted file system inside a file?

Recently i've found this interesting tutorial: http://flossstuff.wordpress.com/2011/08/07/using-a-file-as-a-storage-device/ It explains how to create an empty file, format it as ext4, and mount it ...
8
votes
1answer
6k 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 ...
8
votes
3answers
15k 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 ...