I will show you how to make a super, unhackable USB drive. It will be of no use to anyone but you, and even if someone had access to government grade hacking software, they would not be able to access the data.
I am NOT responsible for whatever you put on the drive, or whatever damage you do with said data or the drive.
Step 1: The Tools
1) A USB drive
The USB drive can be obtained at any store that sells material items. You should probably get a 1GB or bigger, because 1GB only costs about $10. I am using a 4GB that I have had for 2 years (same as the one in the picture below, just half the memory).
TrueCrypt is an open-source (free for your not-so-computer-knowledgeable-person) software. It uses government grade encryption (256-bit) and better, so you can be sure your data is safe. You can download it at http://www.truecrypt.org/. After installing it, you will need to restart your computer.
Step 2: Encrypting the Drive: Part 1
Once you have formatted the drive, open TrueCrypt. Make sure the drive is inserted, then click Create Volume.
Click the middle selection labeled Encrypt a non-system partition/drive.
To create an EXTREMELY well encrypted drive, click Hidden TrueCrypt Volume. For just really good encryption, click Standard TrueCrypt Volume. If you choose to not make a hidden partition, then you can skip step 3.
On the next screen, select Normal Mode. This will tell the program that the drive is normal, and there is no encryption in place yet.
On the next screen, you will be given the chance to select which drive you are encrypting. Choose your drive, and make sure that you choose the one with the drive letter next to it, as seen in the picture.
Next, choose your encryption algorithm. You can keep the ones that are already in place, but I chose to use three different encryption schemes, and a better hash algorithm, as shown in my screenshot.
You are now going to choose a password for the outer volume. I used a password generator and made my password 60 characters long (maximum supported is 64). This means that even I do not know the password. This would normally be a bad thing, but I copied the password into my KeePass database.
The next window will be called Outer Volume Format. Leave the options as default, and move your mouse around inside the window for a minute. Then, click Format. Depending on the drive size, this may take a while. My drive was 4GB, and it took about eleven minutes.
Step 3: Encrypting the Drive: Part 2
A hidden partition gives you what is called "plausable deniability." This means that there is a hidden drive there, and someone may know it, but they cannot prove it. A hidden partition is a great place to put REALLY sensitive documents.
To make the inner partition, you must first decide how big you want it to be. I chose 1500MB, or 1.5GB. That should be good enough.
Next, choose another password (make this one different). I made mine 60 characters long again.
You will go through the encryption algorithm page (I kept the schemes the same) and the format page (keep the defaults) again. The formatting should take less time than when you encrypted the whole drive.
Once you are done, an alert message will pop up, warning you about the hidden volume and how to use it.
OK, by now, if you have done everything correctly, you should have a USB drive that has better-than-government-grade encryption on it. To make it even more secure, go to the next step.
Step 4: Beyond Precautionary: Paranoia
To make your drive really secure, you can do many things. I will show you what i believe is the easiest way.
Open TrueCrypt and mount the hidden volume. Then, go to http://portableapps.com/apps/utilities/eraser_portable and download Eraser Portable. This program can delete data using the Gutmann method so that recovering it is impossible. Install the program on the hidden partition.
Next, go to the TrueCrypt main screen (with the hidden volume still mounted) and click Create an Encrypted File Container. Create a volume on your encrypted drive (I put mine on the hidden partition). If you wish, you can make this voulme with a hidden section. Store your secret files inside this volume.
If you installed Eraser Portable on your USB drive in the same directory as the file you just made, you can erase the file if you feel someone may know the password and there is not enough time to change the password.
Step 5: Final Thoughts
If you chose to make a hidden partition on your drive, what you should do is place some "kinda-secret" files on the regular partition, and your actual secret documents on the hidden partition. This way, if you are ever forced to reveal the password to the drive, you can give the person the password to the outer partition! They may never find out that you have a hidden partition.
If you do make a 60 character password, either get KeePass or hope your memory is as good as you think.
Feel free to comment, rate, or tell me what I did wrong so I can correct it. Also, if someone has an idea for another instructable, please tell me.