Version Information

unencrypted
disk in order for this feature to work. 

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74 
Language Packs 
Language packs contain third-party translations of the TrueCrypt user interface texts. Some 
language packs also contain translated TrueCrypt User Guide. Note that language packs are 
currently supported only by the Windows version of TrueCrypt. 
Installation 
To install a language pack, follow these steps: 
1. Download a language pack from: 
http://www.truecrypt.org/localizations
 
2. Extract the language pack to the folder to which you installed TrueCrypt, i.e. the folder in 
which the file ‘
TrueCrypt.exe
’ resides; for example, ‘
C:\Program Files\TrueCrypt
’.
3. Run TrueCrypt.
4. Select 
Settings 
-> 
Language
, then select your language and click 
OK
. 
To revert to English, select 
Settings
-> 
Language
. Then select 
English
and click 
OK
. 

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75 
Encryption Algorithms 
TrueCrypt volumes can be encrypted using the following algorithms: 
Algorithm 
Designer(s) 
Key Size (Bits) 
Block Size 
(Bits) 
Mode of 
Operation 
AES 
J. Daemen, V. Rijmen 
256 
128 
XTS 
Serpent 
R. Anderson, E. Biham, L. Knudsen 
256 
128 
XTS 
Twofish 
B. Schneier, J. Kelsey, D. Whiting, 
D. Wagner, C. Hall, N. Ferguson 
256 
128 
XTS 
AES-Twofish 
256; 256 
128 
XTS 
AES-Twofish-Serpent 
256; 256; 256 
128 
XTS 
Serpent-AES 
256; 256 
128 
XTS 
Serpent-Twofish-AES 
256; 256; 256 
128 
XTS 
Twofish-Serpent 
256; 256 
128 
XTS 
For information about XTS mode, please see the section 
Modes of Operation
. 
AES 
The Advanced Encryption Standard (AES) specifies a FIPS-approved cryptographic algorithm 
(Rijndael, designed by Joan Daemen and Vincent Rijmen, published in 1998) that may be used by 
US federal departments and agencies to cryptographically protect sensitive information [3]. 
TrueCrypt uses AES with 14 rounds and a 256-bit key (i.e., AES-256, published in 2001) operating 
in XTS mode (see the section 
Modes of Operation
). 
In June 2003, after the NSA (US National Security Agency) conducted a review and analysis of 
AES, the U.S. CNSS (Committee on National Security Systems) announced in [1] that the design 
and strength of AES-256 (and AES-192) are sufficient to protect classified information up to the 
Top Secret level. This is applicable to all U.S. Government Departments or Agencies that are 
considering the acquisition or use of products incorporating the Advanced Encryption Standard 
(AES) to satisfy Information Assurance requirements associated with the protection of national 
security systems and/or national security information [1].

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