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TrueCrypt, powerful-yet-friendly encryption application
================================================================================
[TrueCrypt][1] is a free open-source powerful, complex and advanced encryption application that provides a qualitative encryption, while containing user-friendly easily-graspable interface and capabilities.
Essentially, TrueCrypt all
ows the user to encrypt files, files then decrypted and enjoyed as regular files, yet, being accessible only via the user's password and non-accessible, fully encrypted for other-than-the-user persons.
Among its **features**, TrueCrypt comes with:
- ability to create encrypted folders and to present them as real disks
- support to encrypt storage devices (like for example, USB sticks) and partitions
- automatic on-the-fly encryption with gains for security
- optimized usage of system resources, permitting fast readings of its encrypted data similar in speed to non-encrypted data
TrueCrypt comes with **on-the-fly** encryption, meaning:
- data is automatically encrypted before it is saved
- data is decrypted after it is loaded
- for example, playing a video clip from an encrypted folder, portion-by-portion decrypts the pieces needed by RAM (and video player) directly in RAM, "TrueCrypt never saves any decrypted data to a disk, it only stores them temporarily in RAM"
**Creating** an encrypted folder with TrueCrypt is doable by following the below steps:
- [download][2] TrueCrypt 7.1
- unpack the archive and type in a terminal (if the archive was unpacked in Downloads)
> cd Downloads
> ./truecrypt-7.1a-setup-x64
(change the file name for 32-bit accordingly)
- then, follow the clickable steps, action that installs TrueCrypt
- launch TrueCrypt via the Dash by typing `truecrypt` in the search area
- create a new to-be-encrypted folder by navigating to `TrueCrypt-->Volumes-->Create New Volume`
- check `Create an encrypted file container` and hit `Next`
![](http://iloveubuntu.net/pictures_me/TrueCrypt%20create%20new%20volume.png)
- check `Standard Truecrypt volume` and hit `Next`
![](http://iloveubuntu.net/pictures_me/TrueCrypt%20standard%20truecrypt%20volume.png)
click on `Select File`, create a new folder/item inside a preferred location (like for example, the item `123` inside the `Music` folder) and hit `Next`
![](http://iloveubuntu.net/pictures_me/TrueCrypt%20volume%20location.png)
- hit again `Next` (the AES encryption algorithm is selected by default)
![](http://iloveubuntu.net/pictures_me/TrueCrypt%20aes.png)
- choose a size (typing, for example, `100` in the writable field with `MB` next to it, creates an 100MB folder)
![](http://iloveubuntu.net/pictures_me/TrueCrypt%20size%20mb.png)
- create a password
![](http://iloveubuntu.net/pictures_me/TrueCrypt%20password.png)
- select a filesystem type (such as `Linux Ext4`)
![](http://iloveubuntu.net/pictures_me/TrueCrypt%20ext4.png)
- check `I will mount the volume only on Linux` (if that is the case)
![](http://iloveubuntu.net/pictures_me/TrueCrypt%20mount%20linux.png)
- move vigorously the mouse pointer for several seconds and click on `Format` and enter one's password, action that completes the encrypted-item's creation process
![](http://iloveubuntu.net/pictures_me/TrueCrypt%20random%20pool.png)
**Opening** now the just-encrypted folder is to be achieved by launching TrueCrypt, clicking on `Select File`, locating the encrypted item and hitting the bottom-area's `Mount` button, action that mounts/opens the encrypted folder.
Next, the user is able to act on the encrypted folder similarly to a regular folder, therefore, being able to copy images to it, rename files, open images by double-clicking on them, etc.
![](http://iloveubuntu.net/pictures_me/TrueCrypt%20nautilus.png)
Clicking on the `Dismount` button, dismounts the encrypted location, the result: the location disappears from Nautilus' sidebar, while the file becomes non-accessible when clicking on it.
![](http://iloveubuntu.net/pictures_me/TrueCrypt%20dismount.png)
via: http://iloveubuntu.net/truecrypt-powerful-yet-friendly-encryption-application
本文由 [LCTT][] 原创翻译，[Linux中国][] 荣誉推出
译者：[Mr小眼儿][] 校对：[校对者ID][]
[LCTT]:https://github.com/LCTT/TranslateProject
[Linux中国]:http://linux.cn/portal.php
[译者ID]:http://linux.cn/space/译者ID
[校对者ID]:http://linux.cn/space/校对者ID
[1]:http://www.truecrypt.org/
[2]:http://www.truecrypt.org/downloads

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功能强大界面友好的加密程序，TrueCrypt
================================================================================
[TrueCrypt][1]是一款免费的开源加密程序，拥具有强大、多样、先进、高质量的加密能力，同时具有友好的用户界面、易用的图形化接口与功能。
TrueCrypt允许用户通过密码访问加密后的文件，其本质上是将文件解密后再像常规文件一样访问。完全加密后的文件，非用户以外的人是无法访问的。
TrueCrypt的各项**特性**如下：
- 能够建立加密文件夹并将其呈现为真实的硬盘
- 支持加密存储设备（例如U盘）或整个分区
- 自动根据需要进行实时动态加密
- 充分利用系统资源，能够快速读取加密数据，速度接近访问未加密数据时的速度
TrueCrypt的**实时动态加密**，意指：
- 数据在存储之前就已经被自动加密
- 数据在加载之后会自动解密
- 例如，播放一个加密文件夹里的小电影，TrueCrypt会直接在内存中将密数据一部分一部分解密后再送入指定的内存块（或播放器）。也就是说“TrueCrypt从不会将明数据放在硬盘上，这些明数据只会暂时存在于内存里”。
下面几个步骤教你如何用TrueCrypt**新建**一个加密文件夹：
- [下载][2]TrueCrypt 7.1
- 解压缩后在终端中输入以下命令（假设你解压在了Downloads文件夹下）
> cd Downloads
> ./truecrypt-7.1a-setup-x64
（如果你的操作系统是32位，将上面的x64改为x32）
- 然后根据提示，几下鼠标，轻松完成安装
- 在Dash搜索栏中键入`truecrypt`,启动TrueCrypt
- 依次点击`TrueCrypt-->Volumes-->Create New Volume`，建立一个新的“待加密文件夹”
- 选中 `Create an encrypted file container`然后点击`Next`
![](http://iloveubuntu.net/pictures_me/TrueCrypt%20create%20new%20volume.png)
- 选中`Standard Truecrypt volume` 并点击 `Next`
![](http://iloveubuntu.net/pictures_me/TrueCrypt%20standard%20truecrypt%20volume.png)
点击`Select File...`，在你认为合适的位置新建目录/条目（例如，在`Music`目录下建立一个`123`条目），然后点击`Next`
![](http://iloveubuntu.net/pictures_me/TrueCrypt%20volume%20location.png)
- 再次点击`Next` （此时默认选择的加密算法是AES）
![](http://iloveubuntu.net/pictures_me/TrueCrypt%20aes.png)
- 选择大小（例如要建立一个100MB的文件夹，就在输入框中填入`100`，后面的复选框选中`MB`）
![](http://iloveubuntu.net/pictures_me/TrueCrypt%20size%20mb.png)
- 设置一个密码
![](http://iloveubuntu.net/pictures_me/TrueCrypt%20password.png)
- 选择一个文件系统类型（例如`Linux Ext4`)
![](http://iloveubuntu.net/pictures_me/TrueCrypt%20ext4.png)
- 选中`I will mount the volume only on Linux`（这里请根据实际情况选择）
![](http://iloveubuntu.net/pictures_me/TrueCrypt%20mount%20linux.png)
- 接下来，持续玩儿命晃动你的鼠标几秒钟（重要：该步骤用来生成密钥，晃动越无规律时间越长越好），然后点击`Format`，最后输入刚才设置的密码，整个加密条目的创建过程就完成了。
![](http://iloveubuntu.net/pictures_me/TrueCrypt%20random%20pool.png)
**使用**
到此为止，刚刚建立的那个加密文件夹就已经在TrueCrypt的保护下了，点击 `Select File`，找到刚建立的加密条目，再点击底部的`Mount`，挂载/打开该加密文件夹。
接下来，用户就可以把这个加密目录当做一个常规目录正常使用，比如往里面拷点小电影啊，重命名为“苍老师现场授课”啊，随时想看哪趟课的时候正常双击就可以开始上课了（译者温情提示：记得先备好纸巾锁好门哟~）。
![](http://iloveubuntu.net/pictures_me/TrueCrypt%20nautilus.png)
下图中，点击`Dismount`按钮，就可以卸载该加密文件夹，卸载后刚才挂载的盘符就不见了，同时里面的文件自然也就禁止访问了。
![](http://iloveubuntu.net/pictures_me/TrueCrypt%20dismount.png)
via: http://iloveubuntu.net/truecrypt-powerful-yet-friendly-encryption-application
本文由 [LCTT][] 原创翻译，[Linux中国][] 荣誉推出
译者：[Mr小眼儿] 校对：[校对者ID][]
[LCTT]:https://github.com/LCTT/TranslateProject
[Linux中国]:http://linux.cn/portal.php
[Mr小眼儿]:http://linux.cn/space/14801
[校对者ID]:http://linux.cn/space/校对者ID
[1]:http://www.truecrypt.org/
[2]:http://www.truecrypt.org/downloads