Kenneth: /* TrueCrypt */

2024-05-16T20:11:25Z

TrueCrypt

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	TrueCrypt - Free Open-Source On-The-Fly Disk Encryption Software for Windows Vista/XP, Mac OS X and Linux - http://www.truecrypt.org		TrueCrypt - Free Open-Source On-The-Fly Disk Encryption Software for Windows Vista/XP, Mac OS X and Linux - http://www.truecrypt.org

			== Deprecated ==

			See [[VeraCrypt]]

	== Linux Command Line ==		== Linux Command Line ==

Kenneth at 19:55, 15 June 2014

2014-06-15T19:55:25Z

New page

== TrueCrypt ==

TrueCrypt - Free Open-Source On-The-Fly Disk Encryption Software for Windows Vista/XP, Mac OS X and Linux - http://www.truecrypt.org

== Linux Command Line ==

Install: (RPMForge)
yum install truecrypt

Create volume:
truecrypt -c # answer several questions

Mount volume:
truecrypt [enc_file] [mount_point]

Unmount volume:
truecrypt -d [mount_point]
truecrypt -d # unmount all

Mount with password passed in:
truecrypt CRYPTFILE CRYPTDIR -p 'PASSWORD' -k '' --protect-hidden=no
echo "PASSWORD" | truecrypt CRYPTFILE CRYPTDIR -p '' -k '' --protect-hidden=no

== Purpose ==

[http://www.truecrypt.org/docs/?s=hidden-volume TrueCrypt - Free Open-Source Disk Encryption - Documentation - Hidden Volume]:
:"It may happen that you are forced by somebody to reveal the password to an encrypted volume. There are many situations where you cannot refuse to reveal the password (for example, due to extortion). Using a so-called hidden volume allows you to solve such situations without revealing the password to your volume."
:"The principle is that a TrueCrypt volume is created within another TrueCrypt volume (within the free space on the volume). Even when the outer volume is mounted, it is impossible to prove whether there is a hidden volume within it or not*, because free space on any TrueCrypt volume is always filled with random data when the volume is created** and no part of the (dismounted) hidden volume can be distinguished from random data. Note that TrueCrypt does not modify the file system (information about free space, etc.) within the outer volume in any way."

[http://www.truecrypt.org/docs/?s=tutorial TrueCrypt - Free Open-Source Disk Encryption - Documentation - Tutorial]
:"How to Create and Use a TrueCrypt Container
:This chapter contains step-by-step instructions on how to create, mount, and use a TrueCrypt volume. We strongly recommend that you also read the other sections of this manual, as they contain important information."

[http://www.truecrypt.org/docs/?s=plausible-deniability Plausible Deniability]

http://en.wikipedia.org/wiki/TrueCrypt

== Cold Boot Attack ==

[http://www.eff.org/press/archives/2008/02/21-0 Research Team Finds Security Flaw in Popular Disk Encryption Technologies]
*Laptops in "Sleep" or "Hibernation" Mode Most Vulnerable to Attack
*the researchers show that data is vulnerable because encryption keys and passwords stored in a computer's temporary memory -- or RAM -- do not disappear immediately after losing power.

[http://citp.princeton.edu/memory/ Lest We Remember: Cold Boot Attacks on Encryption Keys]

[http://www.truecrypt.org/ True Crypt]
:Free open-source disk encryption software for Windows Vista/XP, Mac OS X, and Linux

Q. What encryption software is vulnerable to these attacks?<br>
A. We have demonstrated practical attacks against several popular disk encryption systems: BitLocker (a feature of Windows Vista), FileVault (a feature of Mac OS X), dm-crypt (a feature of Linux), and TrueCrypt (a third-party application for Windows, Linux, and Mac OS X). Since these problems result from common design limitations of these systems rather than specific bugs, most similar disk encryption applications, including many running on servers, are probably also vulnerable.

[http://citp.princeton.edu/memory/exp/ Experimenting with Memory Remanence]

<pre>
#!/usr/bin/env python

# a pirate's favorite chemical element
a = ""
while 1: a += "ARGON"
</pre>

sudo strings /dev/mem | less

== TrueCrypt Linux Help ==

<pre>
$ truecrypt -h
Usage: truecrypt [--auto-mount <str>] [--backup-headers] [--background-task] [-C] [-c] [--create-keyfile] [--delete-token-keyfiles] [-d] [--encryption <str>] [--explore] [--filesystem <str>] [-f] [--fs-options <str>] [--hash <str>] [-h] [--import-token-keyfiles] [-k <str>] [-l] [--list-token-keyfiles] [--load-preferences] [--mount] [-m <str>] [--new-keyfiles <str>] [--new-password <str>] [--non-interactive] [-p <str>] [--protect-hidden <str>] [--protection-keyfiles <str>] [--protection-password <str>] [--random-source <str>] [--restore-headers] [--quick] [--size <str>] [--slot <str>] [--test] [-t] [--token-lib <str>] [-v] [--version] [--volume-properties] [--volume-type <str>] [Volume path] [Mount point]
--auto-mount=<str> Auto mount device-hosted/favorite volumes
--backup-headers Backup volume headers
--background-task Start Background Task
-C, --change Change password or keyfiles
-c, --create Create new volume
--create-keyfile Create new keyfile
--delete-token-keyfiles Delete security token keyfiles
-d, --dismount Dismount volume
--encryption=<str> Encryption algorithm
--explore Open explorer window for mounted volume
--filesystem=<str> Filesystem type
-f, --force Force mount/dismount/overwrite
--fs-options=<str> Filesystem mount options
--hash=<str> Hash algorithm
-h, --help Display detailed command line help
--import-token-keyfiles Import keyfiles to security token
-k, --keyfiles=<str> Keyfiles
-l, --list List mounted volumes
--list-token-keyfiles List security token keyfiles
--load-preferences Load user preferences
--mount Mount volume interactively
-m, --mount-options=<str> TrueCrypt volume mount options
--new-keyfiles=<str> New keyfiles
--new-password=<str> New password
--non-interactive Do not interact with user
-p, --password=<str> Password
--protect-hidden=<str> Protect hidden volume
--protection-keyfiles=<str> Keyfiles for protected hidden volume
--protection-password=<str> Password for protected hidden volume
--random-source=<str> Use file as source of random data
--restore-headers Restore volume headers
--quick Enable quick format
--size=<str> Size in bytes
--slot=<str> Volume slot number
--test Test internal algorithms
-t, --text Use text user interface
--token-lib=<str> Security token library
-v, --verbose Enable verbose output
--version Display version information
--volume-properties Display volume properties
--volume-type=<str> Volume type

Synopsis:

truecrypt [OPTIONS] COMMAND
truecrypt [OPTIONS] VOLUME_PATH [MOUNT_DIRECTORY]

Commands:

--auto-mount=devices|favorites
Auto mount device-hosted or favorite volumes.

--backup-headers[=VOLUME_PATH]
Backup volume headers to a file. All required options are requested from the
user.

-c, --create[=VOLUME_PATH]
Create a new volume. Most options are requested from the user if not specified
on command line. See also options --encryption, -k, --filesystem, --hash, -p,
--random-source, --quick, --size, --volume-type. Note that passing some of the
options may affect security of the volume (see option -p for more information).

Inexperienced users should use the graphical user interface to create a hidden
volume. When using the text user interface, the following procedure must be
followed to create a hidden volume:
1) Create an outer volume with no filesystem.
2) Create a hidden volume within the outer volume.
3) Mount the outer volume using hidden volume protection.
4) Create a filesystem on the virtual device of the outer volume.
5) Mount the new filesystem and fill it with data.
6) Dismount the outer volume.
If at any step the hidden volume protection is triggered, start again from 1).

--create-keyfile[=FILE_PATH]
Create a new keyfile containing pseudo-random data.

-C, --change[=VOLUME_PATH]
Change a password and/or keyfile(s) of a volume. Most options are requested
from the user if not specified on command line. PKCS-5 PRF HMAC hash
algorithm can be changed with option --hash. See also options -k,
--new-keyfiles, --new-password, -p, --random-source, -v.

-d, --dismount[=MOUNTED_VOLUME]
Dismount a mounted volume. If MOUNTED_VOLUME is not specified, all
volumes are dismounted. See below for description of MOUNTED_VOLUME.

--delete-token-keyfiles
Delete keyfiles from security tokens. See also command --list-token-keyfiles.

--import-token-keyfiles
Import keyfiles to a security token. See also option --token-lib.

-l, --list[=MOUNTED_VOLUME]
Display a list of mounted volumes. If MOUNTED_VOLUME is not specified, all
volumes are listed. By default, the list contains only volume path, virtual
device, and mount point. A more detailed list can be enabled by verbose
output option (-v). See below for description of MOUNTED_VOLUME.

--list-token-keyfiles
Display a list of all available security token keyfiles. See also command
--import-token-keyfiles.

--mount[=VOLUME_PATH]
Mount a volume. Volume path and other options are requested from the user
if not specified on command line.

--restore-headers[=VOLUME_PATH]
Restore volume headers from the embedded or an external backup. All required
options are requested from the user.

--test
Test internal algorithms used in the process of encryption and decryption.

--version
Display program version.

--volume-properties[=MOUNTED_VOLUME]
Display properties of a mounted volume. See below for description of
MOUNTED_VOLUME.

MOUNTED_VOLUME:
Specifies a mounted volume. One of the following forms can be used:
1) Path to the encrypted TrueCrypt volume.
2) Mount directory of the volume's filesystem (if mounted).
3) Slot number of the mounted volume (requires --slot).

Options:

--encryption=ENCRYPTION_ALGORITHM
Use specified encryption algorithm when creating a new volume.

--filesystem=TYPE
Filesystem type to mount. The TYPE argument is passed to mount(8) command
with option -t. Default type is 'auto'. When creating a new volume, this
option specifies the filesystem to be created on the new volume.
Filesystem type 'none' disables mounting or creating a filesystem.

--force
Force mounting of a volume in use, dismounting of a volume in use, or
overwriting a file. Note that this option has no effect on some platforms.

--fs-options=OPTIONS
Filesystem mount options. The OPTIONS argument is passed to mount(8)
command with option -o when a filesystem on a TrueCrypt volume is mounted.
This option is not available on some platforms.

--hash=HASH
Use specified hash algorithm when creating a new volume or changing password
and/or keyfiles. This option also specifies the mixing PRF of the random
number generator.

-k, --keyfiles=KEYFILE1,KEYFILE2,KEYFILE3,..
Use specified keyfiles when mounting a volume or when changing password
and/or keyfiles. When a directory is specified, all files inside it will be
used (non-recursively). Multiple keyfiles must be separated by comma.
Use double comma (,,) to specify a comma contained in keyfile's name.
Keyfile stored on a security token must be specified as
token://slot/SLOT_NUMBER/file/FILENAME. An empty keyfile (-k "") disables
interactive requests for keyfiles. See also options --import-token-keyfiles,
--list-token-keyfiles, --new-keyfiles, --protection-keyfiles.

-m, --mount-options=headerbak|nokernelcrypto|readonly|ro|system|timestamp|ts
Specify comma-separated mount options for a TrueCrypt volume:
headerbak: Use backup headers when mounting a volume.
nokernelcrypto: Do not use kernel cryptographic services.
readonly|ro: Mount volume as read-only.
system: Mount partition using system encryption.
timestamp|ts: Do not preserve host-file timestamps (note that the operating
system under certain circumstances does not alter host-file timestamps, which
may be mistakenly interpreted to mean that this option does not work).
See also option --fs-options.

-p, --password=PASSWORD
Use specified password to mount/open a volume. An empty password can also be
specified (-p ""). Note that passing a password on the command line is
potentially insecure as the password may be visible in the process list
(see ps(1)) and/or stored in a command history file or system logs.

--protect-hidden=yes|no
Write-protect a hidden volume when mounting an outer volume. Before mounting
the outer volume, the user will be prompted for a password to open the hidden
volume. The size and position of the hidden volume is then determined and the
outer volume is mounted with all sectors belonging to the hidden volume
protected against write operations. When a write to the protected area is
prevented, the whole volume is switched to read-only mode. Verbose list
(-v -l) can be used to query the state of the hidden volume protection.
Warning message is displayed when a volume switched to read-only is being
dismounted.

--protection-keyfiles=KEYFILE1,KEYFILE2,KEYFILE3,..
Use specified keyfiles to open a hidden volume to be protected. This option
may be used only when mounting an outer volume with hidden volume protected.
See also options -k and --protect-hidden.

--protection-password=PASSWORD
Use specified password to open a hidden volume to be protected. This option
may be used only when mounting an outer volume with hidden volume protected.
See also options -p and --protect-hidden.

--quick
Use quick format when creating a new volume. This option can be used only
when creating a device-hosted volume and must not be used when creating an
outer volume.

--random-source=FILE
Use FILE as a source of random data (e.g., when creating a volume) instead
of requiring the user to type random characters.

--slot=SLOT
Use specified slot number when mounting, dismounting, or listing a volume.

--size=SIZE
Use specified size in bytes when creating a new volume.

-t, --text
Use text user interface. Graphical user interface is used by default if
available.

--token-lib=LIB_PATH
Use specified PKCS #11 security token library.

--volume-type=TYPE
Use specified volume type when creating a new volume. TYPE can be 'normal'
or 'hidden'. See option -c for more information on creating hidden volumes.

-v, --verbose
Enable verbose output.

Examples:

Create a new volume:
truecrypt -t -c

Mount a volume:
truecrypt volume.tc /media/truecrypt1

Mount a volume as read-only, using keyfiles:
truecrypt -m ro -k keyfile1,keyfile2 volume.tc

Mount a volume without mounting its filesystem:
truecrypt --filesystem=none volume.tc

Mount a volume prompting only for its password:
truecrypt -t -k "" --protect-hidden=no volume.tc /media/truecrypt1

Dismount a volume:
truecrypt -d volume.tc

Dismount all mounted volumes:
truecrypt -d
</pre>

== keywords ==

[[Category:Security]]
[[Category:Encryption]]
[[Category:Windows]]
[[Category:Linux]]

TrueCrypt - Revision history

Kenneth: /* TrueCrypt */

Kenneth at 19:55, 15 June 2014