Бесплатная программа для создания защищенных виртуальных дисков. Виртуальные диски, созданные этой утилитой, внешне ничем не отличаются от имеющихся в системе. В результате работы программы создаётся виртуальный диск, защищённый одним из следующих алгоритмов шифрования: AES (256-bit key), Blowfish (448-bit key), CAST5 (128-bit key), Serpent (256-bit key), Triple DES, Twofish (256-bit key). В качестве зашифрованного диска можно использовать часть места на винчестере, flash-карте, дискете и других носителях информации.
Главной отличительной особенностью данной утилиты от программ подобного рода является отсутствие какой-либо информации в заголовках шифруемых файлов, т.е. в операционной системе такие зашифрованные файлы ничем не отличаются от обычных.
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TrueCrypt is a software system for establishing and maintaining an on-the-fly-encrypted volume (data storage device). On-the-fly encryption means that data are automatically encrypted or decrypted right before they are loaded or saved, without any user intervention.
No data stored on an encrypted volume can be read (decrypted) without using the correct password/keyfile(s) or correct encryption keys. Entire file system is encrypted (e.g.., file names, folder names, contents of every file, free space, meta data, etc).
Files can be copied to and from a mounted TrueCrypt volume just like they are copied to/from any normal disk (for example, by simple drag-and-drop operations).
Files are automatically being decrypted on-the-fly (in memory/RAM) while they are being read or copied from an encrypted TrueCrypt volume. Similarly, files that are being written or copied to the TrueCrypt volume are automatically being encrypted on-the-fly (right before they are written to the disk) in RAM.
Note that this does not mean that the whole file that is to be encrypted / decrypted must be stored in RAM before it can be encrypted / decrypted. The are no
extra memory (RAM) requirements for TrueCrypt. For an illustration of how this is accomplished, see the following paragraph.
Let's suppose that there is an .avi video file stored on a TrueCrypt volume (therefore, the video file is entirely encrypted). The user provides the correct password (and/or keyfile) and mounts (opens) the TrueCrypt volume. When the user double clicks the icon of the video file, the operating system launches the application associated with the file type – typically a media player.
The media player then begins loading a small initial portion of the video file from the TrueCrypt-encrypted volume to RAM (memory) in order to play it. While the portion is being loaded, TrueCrypt is automatically decrypting it (in RAM).
The decrypted portion of the video (stored in RAM) is then played by the media player. While this portion is being played, the media player begins loading next small portion of the video file from the TrueCrypt-encrypted volume to RAM (memory) and the process repeats. This process is called on-the-fly encryption/decryption and it works for all file types, not only for video files.
Note that TrueCrypt never saves any decrypted data to a disk – it only stores them temporarily in RAM (memory). Even when the volume is mounted, data stored in the volume is still encrypted.
When you restart Windows or turn off your computer, the volume will be dismounted and files stored in it will be inaccessible (and encrypted).
Even when power supply is suddenly interrupted (without proper system shut down), files stored in the volume are inaccessible (and encrypted). To make them accessible again, you have to mount the volume (and provide the correct password and/or keyfile).
Here are some key features of "TrueCrypt":· Creates a virtual encrypted disk within a file and mounts it as a real disk.
· Encrypts an entire hard disk partition or a storage device such as USB flash drive.
· Encryption is automatic, real-time (on-the-fly) and transparent.
· Provides two levels of plausible deniability, in case an adversary forces you to reveal the password:
· Hidden volume (steganography – more information may be found here).
· No TrueCrypt volume can be identified (volumes cannot be distinguished from random data).
· Encryption algorithms: AES-256, Serpent, and Twofish. Mode of operation: LRW.
What's New in This Release:· Improvements:
· The memory requirements for the TrueCrypt Boot Loader have been reduced by 18 KB. As a result of this improvement, the following problem will no longer occur on most of the affected computers: The memory requirements of the TrueCrypt Boot Loader 5.0 prevented users of some computers from encrypting system partitions/drives (when performing the system encryption pretest, the TrueCrypt Boot Loader displayed the following error message: Insufficient memory for encryption).
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· Bug fixes:
· On computers equipped with certain brands of audio cards, when performing the system encryption pretest or when the system partition/drive is encrypted, the sound card drivers failed to load. This will no longer occur.
· It is possible to access mounted TrueCrypt volumes over a network.
· TrueCrypt Rescue Disks created by the previous version could not be booted on some computers. This will no longer occur.
· Note: If your TrueCrypt Rescue Disk created by TrueCrypt 5.0 cannot be booted on your computer, please upgrade to this version of TrueCrypt and then create a new TrueCrypt Rescue Disk (select 'System' > 'Create Rescue Disk').
· Many other minor bug fixes.
DATE: 12.02.08
LICENSE: Freeware
OS: Windows All
SIZE: 2.35 MB
DEVELOPER: TrueCrypt Foundation
