How Passkeys Work & Full Demo (Diagram and Project) #3

In this video, I explain how passkeys work in the simplest way possible—with zero confusing tech jargon. Even if you have absolutely no software background, you’ll easily understand the exact mechanics behind passwordless authentication.

What we cover in this video:

The Stamp Analogy: A dead-simple way to understand how passkeys secure your login. Think of your private key as a unique physical stamp that never leaves your device, and the website as holding only the paper print.

The 6-Step Technical Flow: The real-world process of what happens under the hood when you log in—how the server issues a 3-minute challenge, how your browser signs it using Touch ID/Face ID, and how a secure session cookie is generated.

Platform vs. Cross-Platform: The difference between device-bound biometrics (Touch ID, Face ID, Windows Hello) and roaming hardware security keys (YubiKeys).

Pros & Cons: An honest breakdown of why passkeys are perfect and ultra-secure for internal admin panels, alongside the real challenges like device recovery and legacy hardware support.

Passkeys are now the global security standard used by Big Tech and required by governments. Watch the full video to see a complete live demonstration of how seamless and unbreakable this technology actually is

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0:00 Intro
0:08 Passkey 101
0:37 Passkey authentication flow diagram
2:08 Passkey Terminology
1:15 Passkey authentication flow diagram (Technical Terms)
3:57 Two passkey types
4:43 Passkey Pros & Cons
6:25 Full Project Demo
10:05 Finale

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Видео How Passkeys Work & Full Demo (Diagram and Project) #3 канала Transcodes: Startups & Builders Essentials 101