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TrueCrypt
http://truecrypt.sourceforge.net/
Free open-source disk encryption for Windows XP/2000/2003
Features:
-It can create a virtual encrypted disk within a file
and mount it as a real disk.
-It can encrypt an entire hard disk partition or a device,
such as USB memory stick, floppy disk, etc.
-Provides two levels of plausible deniability, in case
an adversary forces you to reveal the password:
1) Hidden volume
2) No TrueCrypt volume can be identified (TrueCrypt volumes cannot be
distinguished from random data).
-Encryption algorithms: AES-256, Blowfish (448-bit key),
CAST5, Serpent (256-bit key), Triple DES, and
Twofish (256-bit key). Supports cascading
(e.g., AES-Serpent-Twofish).
-Based on Encryption for the Masses (E4M) 2.02a,
which was conceived in 1997.
-Further information regarding the features of the
software may be found in the documentation.
History:
v3.1a
February 7, 2005
Bug fixes:
Volumes mounted as removable media can now be
checked/repaired ('chkdsk.exe'), defragmented,
formatted, etc.
Volume Creation Wizard now respects default
mount options set via Tools > Preferences.
Fixed bug which caused mount/dismount to
fail on some systems.
The TrueCrypt uninstaller is now always
installed during installation.
Relative paths can be used with the /volume
option (command line usage).
Drive A: will no longer disappear from
Windows Explorer (e.g., 'My Computer' list)
after 'Dismount All'.
Other minor bug fixes
Improvements:
When running in 'traveller' mode, the TrueCrypt driver
will be unloaded when no longer needed (e.g., when
the main application and/or the last instance of the
Volume Creation Wizard is closed and no TrueCrypt
volumes are mounted).
Access mode (read-only or read-write) is now
displayed in the volume properties dialog.
Other minor improvements
v3.1
January 22, 2005
Improvements:
Partitions/devices that are already in use by another
driver (usually an anti-virus utility) can now be mounted.
It is now possible to run multiple instances of the
TrueCrypt Volume Creation Wizard.
New features:
TrueCrypt can now run in 'traveller' mode, which
means that it does not have to be installed on the
operating system under which it is run. There are
two ways to run TrueCrypt in 'traveller' mode:
1) After you unpack the binary distribution archive,
you can directly run 'TrueCrypt.exe'.
2) You can use the new 'Traveller Disk Setup' facility
(accessible from the 'Tools' menu) to prepare a special
'traveller' disk and launch TrueCrypt from it. This facility
can also configure a 'traveller' disk in a way that when
it is inserted, TrueCrypt is automatically started or a
specified volume is mounted (note that this works only
when the 'traveller' disk is a removable medium such
as a CD or DVD; Windows XP SP2 is required in
case of USB memory sticks).
Volumes can now be mounted as read-only. This can
be set in the newly implemented 'Mount Options' dialog,
which can be opened from the password entry dialog or
by holding Control while clicking 'Mount'. (Command line
usage: '/mountoption ro')
Volumes can now be mounted as removable media
(for example to prevent Windows from creating the
'Recycled' and/or 'System Volume Information' folders
on the volume). This can be set in the newly implemented
'Mount Options' dialog, which can be opened from the
password entry dialog or by holding Control while clicking
'Mount'. (Command line usage: '/mountoption rm')
Default mount options can be configured in the main
program preferences (Tools -> Preferences).
'Refresh Drive Letters' function added to the tools menu.
It can be used when Windows Explorer fails to register
a newly mounted volume (for example when it is not
shown in the 'My Computer' list).
Volume can now be selected by dragging its icon
to the TrueCrypt program window (this also allows
to avoid the Windows file selector).
'/auto devices' auto-mounts all device/partition-hosted
TrueCrypt volumes (command line usage).
Bug fixes:
The 'Auto-Mount Devices' facility will not mount 'phantom'
partitions on some removable media (e.g. USB memory sticks).
In some cases TrueCrypt did not use all available space
on some removable media (such as USB memory sticks).
Remark: This bug was inherited from E4M, so it applies
also to volumes created by E4M.
Warning: Note that this means it will not be possible
to mount hidden volumes (does not apply to file-hosted
containers) created with TrueCrypt 3.0 or 3.0a that are
located on some removable media, e.g., some USB
memory sticks, (because the expected position of a
hidden volume changes with the size of its host volume).
If that is the case, please before upgrading to TrueCrypt 3.1,
move your files to a temporary TrueCrypt volume on a
non-removable medium or to a non-hidden volume on
a removable medium and move the data from the old
hidden volume to this temporary one. Then install
TrueCrypt 3.1, create a new hidden volume and move
your files from the temporary volume to it.
Freezing caused by applications not responding to
drive change messages when mounting/dismounting
TrueCrypt volumes will no longer occur. Users are now
prevented from setting a too small cluster size when
creating a FAT volume (which caused various problems).
The command line parser no longer causes
TrueCrypt to crash.
Other minor bug fixes
http://truecrypt.sourceforge.net/
Free open-source disk encryption for Windows XP/2000/2003
Features:
-It can create a virtual encrypted disk within a file
and mount it as a real disk.
-It can encrypt an entire hard disk partition or a device,
such as USB memory stick, floppy disk, etc.
-Provides two levels of plausible deniability, in case
an adversary forces you to reveal the password:
1) Hidden volume
2) No TrueCrypt volume can be identified (TrueCrypt volumes cannot be
distinguished from random data).
-Encryption algorithms: AES-256, Blowfish (448-bit key),
CAST5, Serpent (256-bit key), Triple DES, and
Twofish (256-bit key). Supports cascading
(e.g., AES-Serpent-Twofish).
-Based on Encryption for the Masses (E4M) 2.02a,
which was conceived in 1997.
-Further information regarding the features of the
software may be found in the documentation.
History:
v3.1a
February 7, 2005
Bug fixes:
Volumes mounted as removable media can now be
checked/repaired ('chkdsk.exe'), defragmented,
formatted, etc.
Volume Creation Wizard now respects default
mount options set via Tools > Preferences.
Fixed bug which caused mount/dismount to
fail on some systems.
The TrueCrypt uninstaller is now always
installed during installation.
Relative paths can be used with the /volume
option (command line usage).
Drive A: will no longer disappear from
Windows Explorer (e.g., 'My Computer' list)
after 'Dismount All'.
Other minor bug fixes
Improvements:
When running in 'traveller' mode, the TrueCrypt driver
will be unloaded when no longer needed (e.g., when
the main application and/or the last instance of the
Volume Creation Wizard is closed and no TrueCrypt
volumes are mounted).
Access mode (read-only or read-write) is now
displayed in the volume properties dialog.
Other minor improvements
v3.1
January 22, 2005
Improvements:
Partitions/devices that are already in use by another
driver (usually an anti-virus utility) can now be mounted.
It is now possible to run multiple instances of the
TrueCrypt Volume Creation Wizard.
New features:
TrueCrypt can now run in 'traveller' mode, which
means that it does not have to be installed on the
operating system under which it is run. There are
two ways to run TrueCrypt in 'traveller' mode:
1) After you unpack the binary distribution archive,
you can directly run 'TrueCrypt.exe'.
2) You can use the new 'Traveller Disk Setup' facility
(accessible from the 'Tools' menu) to prepare a special
'traveller' disk and launch TrueCrypt from it. This facility
can also configure a 'traveller' disk in a way that when
it is inserted, TrueCrypt is automatically started or a
specified volume is mounted (note that this works only
when the 'traveller' disk is a removable medium such
as a CD or DVD; Windows XP SP2 is required in
case of USB memory sticks).
Volumes can now be mounted as read-only. This can
be set in the newly implemented 'Mount Options' dialog,
which can be opened from the password entry dialog or
by holding Control while clicking 'Mount'. (Command line
usage: '/mountoption ro')
Volumes can now be mounted as removable media
(for example to prevent Windows from creating the
'Recycled' and/or 'System Volume Information' folders
on the volume). This can be set in the newly implemented
'Mount Options' dialog, which can be opened from the
password entry dialog or by holding Control while clicking
'Mount'. (Command line usage: '/mountoption rm')
Default mount options can be configured in the main
program preferences (Tools -> Preferences).
'Refresh Drive Letters' function added to the tools menu.
It can be used when Windows Explorer fails to register
a newly mounted volume (for example when it is not
shown in the 'My Computer' list).
Volume can now be selected by dragging its icon
to the TrueCrypt program window (this also allows
to avoid the Windows file selector).
'/auto devices' auto-mounts all device/partition-hosted
TrueCrypt volumes (command line usage).
Bug fixes:
The 'Auto-Mount Devices' facility will not mount 'phantom'
partitions on some removable media (e.g. USB memory sticks).
In some cases TrueCrypt did not use all available space
on some removable media (such as USB memory sticks).
Remark: This bug was inherited from E4M, so it applies
also to volumes created by E4M.
Warning: Note that this means it will not be possible
to mount hidden volumes (does not apply to file-hosted
containers) created with TrueCrypt 3.0 or 3.0a that are
located on some removable media, e.g., some USB
memory sticks, (because the expected position of a
hidden volume changes with the size of its host volume).
If that is the case, please before upgrading to TrueCrypt 3.1,
move your files to a temporary TrueCrypt volume on a
non-removable medium or to a non-hidden volume on
a removable medium and move the data from the old
hidden volume to this temporary one. Then install
TrueCrypt 3.1, create a new hidden volume and move
your files from the temporary volume to it.
Freezing caused by applications not responding to
drive change messages when mounting/dismounting
TrueCrypt volumes will no longer occur. Users are now
prevented from setting a too small cluster size when
creating a FAT volume (which caused various problems).
The command line parser no longer causes
TrueCrypt to crash.
Other minor bug fixes