So you have data you need to hide, but don’t want any expensive data program. There is a way to use Notepad to hide your data without anyone being able to find your classified information.
How to Hide Information with Notepad
1) Open command prompt, you may change to any directory as you like to create the text file.
2) Type notepad FILETOCHANGE.txt:StoreHiddenData then press enter. Keeping in mind that FILETOCHANGE.txt is the text file you are going to create whereas StoreHiddenData is the alternate stream name.
3) A new message wil appear. It will say “Cannot find the C:\MyFile.txt:StoreHiddenData.txt file”. Do you want to create a new file?”, click OK button to proceed create the new file.
4) Now a notepad will pop open. Now type any data you want hidden. Save the file and the data is now hidden.A notepad will be pop up. Type any data that you want to be hidden from others. Save the file and you are now successfully creating hidden data for this file.
To display this data you need http://download.sysinternals.com/Files/Streams.zip