Security Basics

Currently Playing: Implementing OAuth and MFA: Full Authentication Breakdown

Every time you click “Sign in with Google” or “Connect with Twitter”, OAuth is working behind the scenes. But what is actually happening? How does an app get access to your data without ever seeing your password? And why do modern apps add an extra security layer with Multi-Factor Authentication? In this video, I break down: • How OAuth works step by step • Why sharing passwords is dangerous • How access tokens protect your account • Why MFA is now mandatory for serious apps • How authenticator apps generate secure codes • What really goes into building MFA from scratch • And how I added full MFA to the ByteMonk dashboard in minutes using Clerk You will also see a real Next.js demo where I integrate Clerk, enable MFA, configure backup codes, and get full session management without writing custom security logic. If you are building a product and authentication is not your core business, this video will save you weeks of work. 📚 Related Resources: → Clerk: https://go.clerk.com/5m0hY7r → ByteMonk Blog: https://blog.bytemonk.io/ → System Design Course: https://academy.bytemonk.io/courses → LinkedIn: https://www.linkedin.com/in/bytemonk/ → Github: https://github.com/bytemonk-academy ⏱️ Timestamps 00:00 Why OAuth Exists 00:42 The Password Problem 01:06 How OAuth Actually Works 02:10 What Is an Access Token? 03:10 How Authenticator Codes Work (TOTP Explained) 06:20 Adding MFA in Minutes with Clerk https://www.youtube.com/playlist?list=PLJq-63ZRPdBt423WbyAD1YZO0Ljo1pzvY https://www.youtube.com/playlist?list=PLJq-63ZRPdBssWTtcUlbngD_O5HaxXu6k https://www.youtube.com/playlist?list=PLJq-63ZRPdBu38EjXRXzyPat3sYMHbIWU https://www.youtube.com/playlist?list=PLJq-63ZRPdBuo5zjv9bPNLIks4tfd0Pui https://www.youtube.com/playlist?list=PLJq-63ZRPdBsPWE24vdpmgeRFMRQyjvvj https://www.youtube.com/playlist?list=PLJq-63ZRPdBslxJd-ZT12BNBDqGZgFo58 #multifactorauthentication #MFA #oauth #bytemonk