It used to be called computer science, but Khan Academy has broken it into two sections called computer programming and cryptography & information theory. If you would like to learn about cryptography and how we keep our information secure, you should look in the cryptography section. If you want to learn how to create animations and games with JavaScript, you should check out the programming section.

You can visit the Computer Science subject directly by entering the url (https://www.khanacademy.org/computing/computer-science) or by navigating to "Subjects > Computing > Cryptography & information theory" from your dashboard