This week, we will cover the basics of crypto needed to succeed in CTF's. Cryptography is the study of mathematical ciphers used to encrypt and decrypt messages. We will cover a wide range of ciphers throughout history, starting with the basics, such as Caesar Cipher, all the way up to modern standards of encryption such as AES and RSA. No experience is required and we encourage anyone interested to show up. We hope to see you there. This live stream event is scheduled to work well for domestic students and will be made promptly available on YouTube. Then, during this stream, an instructor will briefly review the topics covered and work through any points of confusion. Early the following morning, there will be live-streamed "office hours" specifically for international students, during which an instructor will briefly review the topics covered and uork through any points of confusion with participants.