Version Information

Additional Security Requirements and Precautions 
In addition to the requirements and precautions described in this chapter (Security Requirements 
and Precautions), you must follow and keep in mind the security requirements, precautions, and 
limitations listed in the following chapters and sections: 
• How to Back Up Securely 
• Limitations 
• Security Model 
• Security Requirements and Precautions Pertaining to Hidden Volumes 
• Plausible Deniability 
See also: Digital Signatures 

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How to Back Up Securely 
Due to hardware or software errors/malfunctions, files stored on a TrueCrypt volume may become 
corrupted. Therefore, we strongly recommend that you backup all your important files regularly 
(this, of course, applies to any important data, not just to encrypted data stored on TrueCrypt 
volumes).
Non-System Volumes 
To back up a non-system TrueCrypt volume securely, it is recommended to follow these steps: 
1. Create a new TrueCrypt volume using the TrueCrypt Volume Creation Wizard (do not 
enable the Quick Format option or the Dynamic option). It will be your backup volume so its 
size should match (or be greater than) the size of your main volume.
If the main volume is a hidden TrueCrypt volume (see the section Hidden Volume), the 
backup volume must be a hidden TrueCrypt volume too. Before you create the hidden 
backup volume, you must create a new host (outer) volume for it without enabling the Quick 
Format option. In addition, especially if the backup volume is file-hosted, the hidden backup 
volume should occupy only a very small portion of the container and the outer volume 
should be almost completely filled with files (otherwise, the plausible deniability of the 
hidden volume might be adversely affected). 
2. Mount the newly created backup volume. 
3. Mount the main volume. 
4. Copy all files from the mounted main volume directly to the mounted backup volume.