Movie for Education

I will use another movie to support educational process by selecting an appropriate movies about cryptography, the topic that i'm teaching for the half of the semester. I'm downloading Zodiac, A Beautiful Mind, and Sneakers. All of them are old movies (around 1990-2006), but they still talks about cryptography, which is what i need.

Do you have any opinion about what other movies can be used or perhaps you can help me pick one of this three movies to be played on the class, since i won't have time to play them all.