Security :: Encrypt Swap Disk Partition?
Apr 5, 2011
Is it better to use:
Code: -c aes-cbc-essiv -y -s 512 Or:
Code: -c aes-xts-plain -y -s 512
I've never encrypted a disk before; I'm following the Arch wiki (I'm a newbie, basically). Should I try and encrypt my swap partition (I've got 512 MB RAM, 1 GB swap)? Ideally, I'd like to make it so it's not feasible for someone (even a very skilled someone) to access my files (and system -- I'm encrypting /), but still make it fairly fast and usable for day-to-day operations. If it matters any, I'm using JFS.
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Mar 14, 2010
Is there a way to encrypt your swap partition after installation?
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Oct 28, 2010
I'm trying to think of the best way to encrypt a partition on my flash drive.
I plan on storing ssh/pgp keys on it for use on different computers (including school computers, where I won't have administrative access).
TrueCrypt is going to require admin access to decrypt and mount the partition, I think, so that's out.
Are there any other methods you all would recommend?
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Feb 23, 2011
I had a drive with a partition layout like so:
~50gig Windows 7 - NTFS
~100gig Ubuntu - EXT3
~100gig Snow Leopard - HFS+
~100gig Extended Partition
-- ~100gig Swap Disk - exFat
I wanted to delete the Snow Leopard partition and format the Swap Disk partition to something else. exFat was causing major file size bloat on small files. QT sdk bloated to like 11 gigs or something ridiculous like that. Anyways, I loaded up an Ubuntu 10.04 LTS live cd and gparted then deleted the Snow Leopard partition. Gparted said "Mission Accomplished" and tried to rescan the drive, but never found it. At this point I restarted the computer, a dell laptop, which didn't boot with an unable to find a bootable device error. The ubuntu live cd doesn't see the drive anymore. gparted scans for drives indefinitely and fdisk -l has no output.
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Sep 8, 2011
As far as I know hard drives are faster at the beginning of the disk. If this is true, why does Ubuntu put the swap partition to the back of the disk by default?
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Aug 10, 2011
I would like to encrypt my swap partition ...During installation, I tried to select the "encrypt partition" choice, but it needed a passphrase.After installation, I tried to encrypt my partition ... I followed this article: The problem is that my swap partition always changes its path ...When I first booted the system, it was /dev/sda10, next it became /dev/sdc10, now it is /dev/sdb10. This is probably the reason why in fstab all entries are according to UUID.However, the swap partition is not fond of UUIDs ! I tried to mkswap /dev/<current swap partition> -L Swap, I received a UUID, puted it in /etc/crypttab ... it worked for the first time ... but the second time... did not.
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Mar 20, 2011
Does one need to Check the Swap filesystem, from time to time
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Nov 22, 2010
Disk /dev/md0 doesn't contain a valid partition table
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Feb 16, 2011
I was asked today if it was possible to encrypt a CDROM just as you would a disk - and I drew a blank. The question came up discussing a database we maintain with a lot of the organizations financial info plus ersonal membership data. Can I create and mount an encrypted CD? What are the performance effects? Is it a viable one to two year archive medium? The plan is to store period off-site backups and I can't get a grasp on the feasibility.
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Jan 20, 2010
I'm currently writing a simple script which uses luckyBackup to backup my /home directory to /tmp. I then want to tar it, encrypt it with gpg and move it onto a usb stick. My question is that suppose my hard disk died and I needed to restore from this USB backup, would I still be able to decrypt the file given that I would have lost gpg keys etc when the disk died? (I would still know the passphrase though). Should I be backing up gpg files separately?
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Mar 14, 2010
Im using gmail with https always turned on but what programs can i use to easily encrypt emails? Is pretty good privacy easy to use?
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Jul 27, 2010
I have a ext hdd..seagate go. And my 14 yr old son likes to get into it without asking me; of course i dont care when he asks but i don't really want him to get in there and erase anything. I am about to leave for training for 18 weeks with the military. Is there a way i can "secure" the drive for the amount of time that I can't take it with me?
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Apr 1, 2010
We have some script files on our linux servers. For security purpose our requirement is to keep these files encrypted . I mean when we open the files it will looks like as for example i am showing you one encripted file of iur server. how can i do this.
one encrypted files from our server:-
[utibaadm@AIRTELVTUD2_UVAS01server_monitoring]$cat SOUTH_DTH_MONITOR.sh
#!/bin/sh
skip=14
tmpdir=`/bin/mktemp -d ${TMPDIR:-/tmp}/gzexe.XXXXXXXXXX` || exit 1
prog="${tmpdir}/`echo "$0" | sed 's|^.*/||'`"
[Code].....
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Jan 17, 2010
Is the encrypt system during the install part of the SE Linux or is a whole other thing and another question maybe a sounding a little conspiracy but SE linux is made by the NSA can I trust SE linux and it not be a backdoor to my stuff
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Aug 24, 2011
does anyone know the best way to encrypt an entire HD with both Fedora and Windows 7 on it already? At the very least I would want to encrypt the Linux partition, as that has the most sensitive stuff on it.
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Feb 16, 2010
I loaded Ubuntu desktop onto my flash drive with the USB Installer For Ubuntu from [url]
I'll be placing sensitive data on the drive & need to figure out how to encrypt it. From what i've read so far, the easiest way will be to encrypt the swap, /home, tmp, temp files. Not quite sure how to do this. I'd prefer to encrypt the whole drive, but this seems quite complicated.
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May 1, 2010
I already have Ubuntu 9.10 on my system and don't want to have to reinstall all my programs after a clean install. I want to encrypt my hard drive so it will boot and ask for a password. Does anyone know if this is possible?
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May 11, 2010
I'm using lucid desktop edition, and I need to encrypt my home folder, but I didn't mark that option in the fresh instalation of lucid. I'd like the login screen to ask for the password and then decrypt my files.Is it possible to do without erasing my user?
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Jun 11, 2010
I'm looking for software to encrypt my entire S.O. It's something like nobody can erase the hard drive or can't trying to hack. I'm using Ubuntu Server x64.
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Oct 30, 2010
I know Pidgin store chat log in plain text or HTML format.Is there any plugin for pidgin to encrypt the chat log while logging it?Similar to Windows version of MSN Messenger free application called MSNPlus! that contains this feature to encrypt chat log.
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Jul 13, 2011
I just found a neat way to encrypt a file in Ubuntu 10.04.
I right click on a file and select the Encrypt option. The program prompts me to "Choose Recipient" so I choose myself on the list. Then it prompts me to enter my passphrase.
Once all that's done I hit enter and it adds .pgp to the end of whatever file just encrypted. The same basic method is used to Sign the file.
Does it sound as though what I said is correct and that the file I wanted to encrypt was indeed encrypted?
Can anyone crack my files without the passphrase? I'm sure it depends on the complexity and length of the passphrase.
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Jan 5, 2011
I have a script that crond runs each night. The script pulls some sensitive files from an SFTP server and stores them in a folder on the local machine.I need to encrypt those files on the filesystem. Ideally, I could encrypt the folder they're stored in to require a password whenever the files are accessed. The problem is that then crond wouldn't be able to access the files. Using something like ecryptfs would allow the cron script to mount the encrypted storage by supplying the password, but now the keys to the kingdom are just sitting in a cron shell script.
Is there a good way to approach this? One thought I had was finding a tool that lets cron encrypt the files using a public key, then require a password to decrypt them (silently using the password to access the related private key)I don't want too much complexity on the decryption side, because I will have relatively non-tech people needing to access those files occasionally.
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May 7, 2010
I am using auth_param basic program /usr/lib/squid/squid_ldap_auth to authenticate users using squid from ldap. The user and pass is in clear text over the network between the browser and the squid server. Any way to send it in an encrypted format??
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Feb 8, 2010
I was reading another thread about someone with a bad partition table and I decided to join this forum. I'm not going to take any drastic actions with the partition (/dev/sda3) in question. I am going to wait for instructions on what to do first. I am not very good with Linux and need some hand holding. System: DELL 4550 Dual-Booted with XP and Ubuntu. Works OK, just no swap. Well, here's what I did: I deleted a partition for Windows XP Pro because it was a trial, and it ran out. I then decided to slide the swap partition for the Ubuntu Linux that I dual-boot into over. (If this was successful, I was going to try expanding the root partition to take up the unused space.) I used Gparted on a CD to do this, as I figured it was safe to do.
I now cannot mount the swap space at bootup (and have to go into a backup version of the OS), although I can use Gparted in Linux to execute the "swapon" command, and it appears that it worked because I now see "swapoff" as an option on the context menu. (I actually don't even need a swap partition, except to hibernate.) If I highlight the swap partition and click on "Drive" on Gparted's menu bar and select "Create Partition Table", it will erase all data on /dev/sda, so how do I fix the bad partition table non-destructively?
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Sep 3, 2010
Is there any yum package out there that would enable me to encrypt single files/folders via the right click menu (the one with Open, broswer etc etc)
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Feb 11, 2010
I have just installed Ubuntu Jaunty (I do not like Karmic, please don't try to make me upgrade) and after installing all my programs I realized I did not encrypt my home directory.
I know it's very simple to do this during the installation but I can't seem to find an option to do it after it.
Is there a way to do this?
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Apr 10, 2010
I recently installed Ubuntu Linux and did not encrypt the home directory during the install. Now I want to encrypt my home directory, or even better the whole hard drive.
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Apr 18, 2010
Folks:What can I use to encrypt all data on my USB flash drive? If possible, could I use something that has a public Key, so I do not have to type in a password to access the information when I plug the drive into my machie, but will not open or display contant if the drive is plugged into anyone else's machine, unless they have the public key?
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Sep 8, 2010
I recently upgraded to Ubuntu 10.04. I love the passwords and keys application, but was somewhat surprised at the lack of a context menu in gnome to encrypt a file.
In general, I cannot find how to encrypt files using the keys I generate. Maybe I'm missing something? Probably, I just thought since Ubuntu comes with OOB key generation it would have OOB encryption capabilities.
I've read about seahorse and other ways to ADD encryption, I'm just wondering if ubuntu does it natively. It'd be a good idea to add to brainstorms, right click and encrypt.
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Nov 5, 2010
So what I want to do is encrypt my entire hard drive, but heres the thing.
I dual boot Ubuntu and windows 7, but I am afraid that if I use truecrypt to do the encrypting that it will wipe GRUB and not allow me to boot into any OS, is that a possibility and is there a way around it?
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