Update truecrack.md

Added Help section

tools/truecrack.md

@@ -4,24 +4,45 @@ Notes
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 Truecrack performs bruteforce password attacks on Truecrypt containers. It works on Linux and it is optimized for Nvidia Cuda technology.
 
-What would you use this tool for?
-Why would you use it?
-
-
 Help Text
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 ```
-TBA
+TrueCrack v3.0
+Website: http://code.google.com/p/truecrack
+Contact us: infotruecrack@gmail.com
+Bruteforce password cracker for Truecrypt volume. Optimazed with Nvidia Cuda technology.
+Based on TrueCrypt, freely available at http://www.truecrypt.org/
+Copyright (c) 2011 by Luca Vaccaro.
+
+Usage:
+ truecrack -t <truecrypt_file> -k <ripemd160|sha512|whirlpool> -w <wordlist_file> [-b <parallel_block>]
+ truecrack -t <truecrypt_file> -k <ripemd160|sha512|whirlpool> -c <charset> [-s <minlength>] -m <maxlength> [-b <parallel_block>]
+
+Options:
+ -h --help            			Display this information.
+ -t --truecrypt <truecrypt_file>  	Truecrypt volume file.
+ -k --key <ripemd160 | sha512 | whirlpool>  	Key derivation function (default ripemd160).
+ -b --blocksize <parallel_blocks>   	Number of parallel computations (board dependent).
+ -w --wordlist <wordlist_file>  	File of words, for Dictionary attack.
+ -c --charset <alphabet>		Alphabet generator, for Alphabet attack.
+ -s --startlength <minlength>		Starting length of passwords, for Alphabet attack (default 1).
+ -m --maxlength <maxlength>		Maximum length of passwords, for Alphabet attack.
+ -r --restore <number>			Restore the computation.
+ -v --verbose         			Show computation messages.
+
+Sample:
+ Dictionary mode: truecrack --truecrypt ./volume --wordlist ./dictionary.txt 
+ Charset mode: truecrack --truecrypt ./volume --charset ./dictionary.txt --maxlength 10
+
 ```
 
 Example Usage
 -------
 
-
 ```
 truecrack --truecrypt <container.tc> --wordlist <password.txt>
-```
 
+```
 Links
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 [Truecrack project hosting](https://code.google.com/p/truecrack/)