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 international students and will serve as an "office hour" for the domestic event. Participants are encouraged to first watch the primary event's recording, which 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.