Earlier this week, software engineer Paul Butler published a blog post titled "Smuggling arbitrary data through an emoji." In it, he showcased a tool he created to allow you to do this yourself and ...

If you have viewed a Web page containing strange characters you did not understand, you may have seen Unicode characters. Unicode consists of a character set that covers most languages in the world.

Using the in-built utilities Charmap and Eudcedit, Windows allows you to insert Unicode and special characters in Notepad and your other documents. But the process is not easy and takes a bit of time.