Ubuntu Security :: Securely Delete File In TrueCrypt Volume

Jan 4, 2011

This one being Ubuntu 9.10 (yes, I know I really should upgrade). I keep a number of confidential files in a TrueCrypt container which is a standalone file in my Documents folder. I'd like to delete some of these, but I want to do it as securely as I can, but I believe if I simply hit 'Delete' with the file selected it'll move the file to the Deleted Items folder. This, I assume, means that the file is taken out of the encrypted volume and stored unencrypted in the Deleted folder.

I've been reading a little about the Shred command, and there seems to be some question about whether it works effectively with a journalled file system; and since I have no idea whether I'm using a journalled file system, or how to find out, I'm treating Shred and other over-writing secure deletion tools as ineffective for now.

With this in mind, can anyone advise me how I can protect the file stored in the TrueCrypt volume, and delete it in place, without taking it out of the encrypted area? And, further to that, can anyone tell me whether in fact the file is actually secured while it's in the encrypted volume? For all I know, just opening the volume may result in copies being made somewhere (apart from RAM).

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Ubuntu Security :: TrueCrypt - Hidden Volume Protection ?

Jan 22, 2010

I installed TrueCrype 6.3a on my 8.1 Ubuntu. Everything went fine until I got to the part where I need to protect my hidden volume from damaged caused by writing to the outer volume (these instructions: [url] ). I can't find the checkbox to "Protect hidden volume from damaged caused by writing to outer volume". The closest thing I can find is an option to "Protect hidden volume when mounting outer volume". Intuitively these don't sound the same to me. There are 2 difference between my setup and the instructions; 1) the instructions appear to be written for Windows and not Linux. 2) I am using a file volume and not a partition volume.

Does anyone know where the option is to protect the hidden volume when writing to the outer volume?

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Ubuntu Security :: Auto Mount The Truecrypt Volume?

Feb 9, 2010

I have a 2nd hard drive that I have encrypted using true crypt. Is it possible to set this up with key files (or some other way) to auto mount when linux boots. I need it in true crypt because there are some work programs I dual boot to use in windows, and need to have access to the drive in XP from time to time, and true crypt can mount there as well. But 90+% of my time is in linux and I would like to have it auto mount through fstab (or whatever way it needs to be). My entire linux setup has been set up with encryption through dm crypt and LUKS (except for /boot). So I would think having a key file stored on the computer and an auto mount fstab would be just as secure as however secure my LUKS setup is. So any way to auto mount a true crypt 2nd drive volume?

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Ubuntu Security :: TrueCrypt Volume Is No Longer Bootable

Jul 16, 2010

I installed TrueCrypt in Microsoft Windows XP SP3 (no Linux installations present) and I stopped the TrueCrypt service in the Windows enviroment, and then, I restarted, and all the sudden it seemed the PC can not see the Hard Disk at all at startup, nada... I believe I dismounted it by stopping the TrueCrypt service... So the PC no longer understands there is a TrueCrypt volume in place, and I inserted the TrueCrypt recovery disk, and it can not do any thing, I restored the bootloaders, the true crypt loader, and once I finished this, I press ESC, and it says there are no bootable devices, so nothing. I even decrypted the disk, and it seemed that nothing happened with the restore disk...

Is there any way I can make this partition bootable again? because I have every thing in that partition, every single bit of life... I have used TestDisk under Linux right now, but I am unsure of this, and I also further complicated the boot proccess, and now the PC states at startup about missing partition tables. When I start truecrypt from this Kubuntu live CD, I am unable to see the encrypted hard disk even with root, there is no way to see this hard disk, only can be seen in the TestDisk app. I really I am desperate, at least, if I can not make Windows Boot again, maybe just suck all the files out of the hard disk and put them some where for now, I really need to get back to work, and I cant seem to find a solution...

I know here at Ubuntu forums, some one may have the solution. And I do know for sure all the files on this volume are there because of the TestDisk app, so they are there, they are just not reachable.... (I have posted this problem on a Linux forums instead of a Windows forum because the only way to try to recover the volume is with Linux Kubuntu Live CD

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Ubuntu Security :: Create An AutoMount Truecrypt Volume?

Dec 29, 2010

How do I create a Truecrypt volume that will automount on bootup?

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Security :: Truecrypt Volume On Ftp Server Inferior To Sftp?

Feb 24, 2011

If one uses a free ftp account to store private data such as bookmarks, they might prevent any eavesdropping by using ssh for the transfer (ftps), or alternatively sftp.

However, they would still have to trust the ftp hosting provider, because the data is stored unencrypted in the server.

Someone suggested putting all bookmarks in a small truecrypt volume instead and synchronizing this with the ftp server.

Performance issues aside, given that the plaintext only changes a little in each resync (only a bookmark is added usually), is the use of the truecrypt volume introducing a means for an eavesdropper to break the code?

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Ubuntu Security :: Truecrypt - Remote Mount Volume - Or Send Bash Script Remotely?

Apr 1, 2011

I have an Ubuntu 10.04 machine at home and apache setup on it (files are located in a Truecrypt volume). The reason for the web server being that I wanted to access my files wherever I'm at (i.e. hotel, work, hotspots, etc...). So far, it's worked out great for me seeing as a I can http download my files (or stream media files). However, I am often on a public hotspot and I know it's a matter of time before someone finds the webserver on my computer. I have the machine firewalled and password protected (via .htaccess), but either way I don't want people looking in on my computer.

The problem: I have used Truecrypt for a long time and completely trust using the program to encrypt/unencrypt a volume container to store my files. Usually, I would remote desktop into my computer and mount/unmount the volume when I needed it. However, after time it get's really annoying to do this. So I eventually figured out how to setup a bash script to automatically do this for me (which I put on the usb part of my phone). What I wanted to do was to be able send the bash script to my Ubuntu machine (via ftp from my phone) and have Ubuntu automatically run the script. Is this possible? What programs do I need on Ubuntu?

I was thinking about using something like cron, but that is for scheduled times. I don't really have a set time in which I need my files, it's pretty sporadic depending on how much I travel. Thus the need for being able to remotely mount the volume when I need it.

Summary: I need a way for Ubuntu to read a folder every minute or so to check for bash scripts to run. I want to be able to send the bash script via ftp from my phone, have Ubuntu run the script, then delete itself (so as to not store the password). I already know the script in which to mount the Truecrypt volume and how to send the file via ftp from my phone. It's really a matter of what program to use in Ubuntu to find and run the script.

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Ubuntu :: Use Swat Securely From A Securely Location?

Aug 6, 2010

How can you use swat securely from a securely location?

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Ubuntu :: TrueCrypt Volume Not Unmounting In Xubuntu 11.04?

Jul 16, 2011

I successfully created a TrueCrypt volume and mounted it and put some files there.

Then I tried to unmount and just could not.

I can still see the files when I go to /media/truecrypt1.

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Security :: Backup Securely With Rsync?

Jul 11, 2010

To copy from production to standby over the internet I use a cron job doing rsync -avze 'ssh -p 8022' --exclude-from= ....

My question is: should the cron job run on the production or the standby system. Root access to the remote system is given by a pass phrase-less ssh key. Currently I run rsync on the production system. I guess that it is more secure because the standby needs no ssh login to production. Running rsync on the standby would use less resources on production. I am concerned that in this case there would be pass phrase-less access from standby to production.

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Slackware :: Truecrypt Hidden Volume ?

May 15, 2011

I mount truecrypt ntfs hidden volume in Slackware, i can read but i can't write to it. It shows "Operation not permitted". I can read and write from other distro without any problem.

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Ubuntu Security :: How To Setup Web-facing Ssh Server Securely

Oct 18, 2010

I have a small network at my office (3 workstations, 1 ubuntu desktop that I'm using as a file server). I'm using a WRT54G2 router for networking and internet connectivity. Here's what I'm trying to accomplish: I want to be able to access my little file server from home, across town. I think ssh might be the best way to go now. What I don't know: How do I set up the ssh server on my machine/network without compromising my network security and the security of my server? Do I just set up port/ip forwarding on my router, install openssh, and that's it?

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Ubuntu Security :: Transferring Sensitive Data Quickly And Securely?

Jun 27, 2011

My company needs to send sensitive data across to another company, 800gb of .dpx. The way I have thought of is:
E-Sata/1TB WD black.
True-encrypted/ hw accelerated aes (3x machines being built with 2600k)
Sha1sum on each file.

The main goal is to make sure that
1. The files that were transferred off the server onto the drive, are exactly the same.
2. Secure.
3. Fast.

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Security :: Running Services Securely - Chroot And Virtualization?

May 26, 2011

I'd like to run a Tor relay, but am trying to understand the security implications. For some time I've run my torrent client in a VirtualBox virtual machine, which is run as a very non-prived user, bridges directly to The Internets, and writes to one directory on the host. My belief is this is about as secure as it can be, but am open to suggestion.If I run a relay in the VM it wouldn't be associated with my use of Tor as a client, which is fine since there is no technical need for them to be connected and it's desirable for security.I read that chroot jails can be broken, particularly when run as root, so I don't really trust that. Also studied a vserver, but it must share the network setup which doesn't strike me as isolated enough.

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General :: Mount Part Of A Dd Image As A Truecrypt Volume

Jul 16, 2011

I have a dd image of a full drive (as a file) that was using Truecrypt system encryption under windows. I want to mount the main partition from that image using Linux's Truecrypt. I am familiar with dd loopback devices and have the partition offset, but I don't know how I can mount it like this because I need to use the truecrypt command.

Is there perhaps some way to create a fake device file for the disk image that I can mount from within Truecrypt?

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Ubuntu :: Mount TrueCrypt Volume To Recover Macrium Reflect Image?

Feb 28, 2011

I have created a TrueCrypt volume, mounted it in Windows, and created an image file for my OS partition using Macrium Reflect (free version). I made a Rescue CD for Macrium, and the setup works great on unencrypted files, but I have no way to mount the TrueCrypt volume, while booted to the Macruim rescue CD. I have Puppy Linux 4.3.1 on a CD, and can boot to it. I'm a beginner's beginner, however, and I haven't figured out how to install TrueCrypt with Puppy Linux running. Getting the Macrium recovery program to run with the TrueCrypt volume mounted looks even more complicated, and I don't know if it's even possible. I want to be able to recover my laptop from a drive failure, as well as protect my OS from bad programs or malware. Macrium reflect does this job well, because it:

1. is free

2. only writes the used space of the system partition to the image file, and also compresses the data, resulting in a relatively small file. (~ 50 percent of the used space on the OS partition)

3. retains drive alignment for a pre-aligned partition.

However, I wish to keep my backup partitions encrypted to protect my privacy. TrueCrypt does an excellent job of this because it:

1. is free

2. encrypts the OS and all data on the computer.

3. protects all backup data.

I like the fact that Puppy Linux can be loaded into memory, so I only need to boot from removable media to work on my OS partition. I understand there is a portable Ubuntu OS, and perhaps this would be a better platform for my goal? Is there a way to combine Linux on removable media, with Macrium Reflect, and recover an image from a TrueCrypt volume?

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Ubuntu Security :: Delete Files Off Journaling File-system?

Feb 19, 2010

I have some very confidental files on my computer that I store such as credit reports, and other things. I always encrypt them with GPG, but there still is that original non-encrypted file left that needs to be deleted. I looked into tools like wipe, and shred but they all say that it really doesn't help on journaling filesystems directly on their man page.

I am not asking how to wipe the whole drive with dd or anything, but I am simply asking if there is a tool that'll delete a single file securely.

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Security :: Locating Process Which Delete Some Specific File

Jun 27, 2010

On my RHEL5 system one of my key file in one specific directory gets deleted when I start my application suite (having multiple processes). Is there some way to narrow down which specific process is deleting this file?

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General :: How To Send A Large File Securely

Aug 28, 2011

I need to send large files from a Linux machine to another using cryptography. The sender machine knows the recipient IP but not vice-versa. I don't need strong cryptography and prefer higher-speed less-secure solutions.

There are no problems with presharing crypto keys but I'd prefer not dealing with SSH users creation.

I think to HTTP PUT over TLS, but I never had experience with it and I prefer to hear which are the possible solutions. I know that it can listen as a daemon but I don't know anything about cryptography. So pipeing with OpenSSL may be a solution.

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Ubuntu Security :: How To Setup The Truecrypt

Apr 8, 2010

I've been looking at setting up truecrypt on my laptop, but the guides on the truecrypt site and the ubuntu documentation seems to be incomplete or not address what i want to do.

What I have:

dual boot windows 7 / Ubuntu (lucid)

What I want is to dual boot with the hidden OS system:

Windows 7 (plausable)
Ubuntu (plausable)
Ubuntu (hidden install)

Is this possible? or is it better to make a hidden /home partition?

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Ubuntu Security :: Truecrypt With Multiboot I10.10/7?

Mar 21, 2011

I work for a all-in-one IT company, basically businesses hire us and we will fix all their problems from servers to pencil sharpenersI want to get some background with UNIX so i wanted to multiboot linux on my laptop and use it for a few weeks. After a few hours of trial and error i managed to install it! So to the point: i used Truecrypt to encrypt my laptop and it used a special boot loader that made me input the password just after the post.My question is, can i use Truecrypt with a multiboot 7/ubuntu? After it took me hours to install this , running into and trouble shooting various problems that were probably just my ignorance, but Linux feels very fragile and i do not want to screw it up.

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Ubuntu Security :: Truecrypt & Easycrypt Do Nothing

Jun 15, 2011

I have repeatedly installed Truecrypt and Easy Crypt but they do not "See" each other nor do they Encrypt Any Folder or File.

Easycrypt keeps telling me that I do not have Truecrypt installed!?

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Ubuntu Security :: Which Hash To Use For TrueCrypt

Jun 22, 2011

TrueCrypt offers 3 hashes for use: RIPEMD-160, SHA-512, WHIRLPOOL.What do most people use? How does one go about deciding which one is appropriate for them? Do they differ in security or performance?

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Ubuntu Security :: Use TrueCrypt With Non-ext3 Partitions?

Mar 23, 2010

When you are creating a TrueCrypt partition it asks what filesystem you will be using:

None
FAT
EXT2
EXT3

This is fine if you decide to create your partition on Linux but I am wondering what you would do if you wanted to create it on your XP partition and access it through the mounted drive. My XP is NTFS and that option does not appear.

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Ubuntu Security :: How To Launch Downloaded TrueCrypt

Mar 7, 2011

I downloaded TruCrypt but can't get it to launch.

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General :: Mount A Windows File Share Securely (encrypted)?

Jan 15, 2009

I'd like to find a way to mount a windows file share securely (encrypted) as I'll be communicating over the Internet.

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Programming :: Copy A File Securely To Remote Host In JAVA?

Feb 2, 2009

I am looking for an API in JAVA which gives me functionality to copy a file to remote host in secure manner like (SCP).

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Ubuntu Security :: Truecrypt Container And Clearing Swap?

Sep 27, 2010

my current plan is to create a truecrypt container with the whirlpool hash. This container will be located on a hdd that is not where my OS will be located (so a separate physical sata drive).My concern is when this container is accessed, that some of the password information could be stored in my swap partition (which is on the main drive where the OS "/" is located)

I would like to have a script or command I could run that after I unmount those drives (or just halt the system) that my swap (and ram too if possible) could be wiped (or like overwritten with the shred command). Also, am I going about this the right way, or should I just use truecrypts FDE on the entire drive? In addition, when Ubuntu does it's default install, does it create a swap file in addition to a swap partition? If it does, would that be another vulnerability? If it is, how do I prevent this from happening?

I welcome any input you have on this. I am aware that once the drive is mounted, it is vulnerable, but I want the data to be secure as possible once my computer is turned off. Also, I have read that there are ram exploits where it holds your passwords for up to a few minutes after you turn the machine off, does anyone know how long that it and is there a way to clear it, or will only time let it fade?

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Ubuntu Security :: Difference Between Dm-crypt/LUKS And TrueCrypt

Oct 4, 2010

I'm simply interested in a more basic discussion of why one would choose one of these methods over the other. What do they offer that the other does not? I'll start with what I know:

- dm-crypt/LUKS
--- included in a lot of install images already; in other words, perhaps easier to implement on a fresh install
- TrueCrypt
--- multiple encryption algorithms possible

[code]....

For me... I have no need for Windows compatibility, though I do use OS X on a dual booting MacBook. I believe TrueCrypt woks with OS X, so that could be a bonus, though I can simply encrypt my home folder on OS X with it's own FireVault and be fine.My setup (after wiping and starting over) will probably be like so:

- /boot on it's own primary partition
- / on it's own primary partition with logical partitions within
--- /usr, /var, /etc, /opt, and the like on a logical partition
--- /home on a logical partition

/home will surely be encrypted and I'm leaning toward encrypting the rest as well, though perhaps it's not necessary. I'm open to input there as well -- is there anything the leaks from normal application use into /var or /tmp that would make one lean toward just encrypting the whole thing?

I opened up TrueCrypt just to look at it and since I can't encrypt a whole partition without losing data... I pretty much have to encrypt from what? A live CD? This could be a drawback -- I think since TrueCrypt isn't coming on install disks, I'd have to go with an unencrypted (or dm-crypt/LUKS) root partition and then use TrueCrypt to make a container (or partition) for /home only. I can't think of another way to do this since I can't encrypt the whole disk as one entity with my dual booting situation...

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Ubuntu Security :: Using TrueCrypt To Encrypt Whole Hard Drive?

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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