Were you ever interested in how does security online work? How does Facebook or Apple store your password securely? How sure are you that the person you are messaging is that person all the time and not a third party at moments? How sure are you your messages are not being read as they make their way to that person? Even if you have looked up these topics or heard about them, perhaps you are interested in the nitty-gritty of it outside of the conceptual area. What are these “keys” that computers use for security? What even is an elliptic curve? This course will go into the fundamentals of cryptography and the processes by which we secure data and information in the digital world. We will introduce the concepts behind these topics and dive into the actual mathematics that defines them, not only getting a vague sense of how things work, but also a deep dive into the atomic structure of cryptography. In the world of computer science, we will see the mathematics behind private-public key encryption, what a PGP key is, as well as basics of hashing and blockchains, and potentially mentioning more complex methods of encryption and elliptic curves. On the mathematical side of things, we will of course see the turning gears behind these concepts, focusing mostly on number theory and prime numbers. If you want to get a fundamental basis for the world of computer security, make sure to stop by!