TrueCrypt 6.3a
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 is automatically encrypted or decrypted right before it is 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. There 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).
What’s new in this version?
Version 6.3a includes Minor improvements and bug fixes.
Homepage: http://www.truecrypt.org/
Review:
Data security is a sensitive topic. Most system are not secured even they have taken some security measures like Windows password, Bios password, Zip file password etc. Everything that is stored in plain text like in above examples can by bypassed. So, encryption is right choice to protect your data.
If you need encryption software for your organization and cost is also an issue then TrueCrypt is for you. Encryption is very necessary to protect your data from mobile disks, your laptops and removable media.
TrueCrypt offers 11 algorithms AES-256, Serpent, or Twofish etc and if you thing that these are not enough then in that case you can chain these algorithms but remember by doing so you have to compromise on noticeable performance penalty. The user can create an encrypted drive where you can store all your sensitive documents with ease and security.
If you’ve a system with dual core or more cores and such a fast media, TrueCrypt will work in the background very smoothly but system performance may be noticeable slower if you apply multiple algorithms.
TrueCrypt is an excellent freeware product. It is best for small organizations with little number of users. But scattered or large network environments need a product with centrally managed capabilities.
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