If you're new to programming or new to Linux, you can learn a lot with Lua, the functional programming language used in popular game engines like Unreal Engine, Roblox, Cocos2d, Gideros, and many more. This tutorial teaches you how to install Lua, how to programme simple scripts, and how to create graphical games using the LÖVE game engine. No previous experience with programming or Linux is required. EVENT: linux.conf.au 2019 — Christchurch, New Zealand SPEAKER: Seth Kenlon PUBLICATION PERMISSIONS: Original video was published with the Creative Commons Attribution license (reuse allowed). ATTRIBUTION CREDITS: Original video source: https://www.youtube.com/watch?v=Gcted4-0puU https://www.youtube.com/watch?v=2fGM3KTwDuQ

Knox Boxes, along with other rapid entry systems are increasing in popularity, as they allow first responders such as police, fire, and paramedics to quickly gain access to a building in the event of an emergency without having to force entry. These devices rely on the security and key control provided by various locks to prevent unauthorized access to buildings. In this talk, I will focus on vulnerabilities of the widely used Knox Box and Medeco cam lock to key duplication attacks. I will demonstrate how a sufficiently skilled attacker could obtain a key that would grant them access to thousands of residential and commercial buildings throughout America, as well as show off new tools designed to streamline the process of duplicating physical keys using CAD and 3D printing. What could possibly go wrong when someone tries to backdoor an entire city? EVENT: DEF CON 26 SPEAKER: m010ch PUBLICATION PERMISSIONS: Original video was published with the Creative Commons Attribution license (reuse allowed). ATTRIBUTION CREDITS: Original video source: https://www.youtube.com/watch?v=f4rPDF993qs https://www.youtube.com/watch?v=gfyqhXmGjCg

Three techniques to optimize website performance by loading JavaScript as late as possible. PUBLICATION PERMISSIONS: Original video was published with the Creative Commons Attribution license (reuse allowed). ATTRIBUTION CREDITS: Original video source: https://www.youtube.com/watch?v=eDd6Y6Z50Mg https://www.youtube.com/watch?v=zMQtPMVYPvs