This is a self-paced course that provides a continuation of information security and cybersecurity topics. Among the topics covered are Introduction to Cryptography, Authentication, Access Control, and Containerization. Students learn about both symmetric and asymmetric encryption and their uses. We also take a look at one-way hashing and how it differs from encryption. We drill into ways that encryption is used in PKI and Digital Certificates. Next, we tackle authentication. Authentication is relevant to multiple fields. In art, antiques, and anthropology, a common problem verifies that a given artifact was produced by a particular person or a specific place or period of history. In computer science, verifying a user's identity is often required to allow access to confidential data or systems. Next, we move on to different access control mechanisms. We then drill into the implementation details of access control in several other operating systems. We follow up with a deep dive into compatibility based access control mechanisms. Finally, we look at access control in virtual machines (VM), virtualization, and containerization. We look into how the operating system achieves access control, and whether these methods are sufficient.