Some time ago I saw something about Alternate Data Streams, but I can't find the source anymore to give credit :(
Alternate Data Streams are a "feature" of NTFS, making it possible for one file to store data in multiple streams, attached to the file.
I have made a small BlogCast about Alternate Data Streams, demonstrating them using a cmd, and a C# program.
It's 8 minutes in length, 6.2 MB in size and I also included the used source code.
This is my first attempt at a BlogCast, and in English, if you have any comment on how to improve it, please tell me :)