Steganography

Hi Professor,

Don't know if you remember me, but I took a computer science class with you in the fall.

For the summer I'm interning at this tech company; it’s going well. It hit the news today that one of our (former) employees is a Russian spy and was arrested yesterday. Not making this up.

But it gets better, and here's why I'm emailing you. The newspaper article says "They embedded coded texts in ordinary-looking images posted on the Internet," which I'm almost positive is what you had us do for the steganography assignment you gave us in the fall.