JWT Token Explained in Depth | Header, Payload, Signature | HS256 | .NET & Web API Interview Guide

In this video, I explain JWT (JSON Web Token) in a very clear and practical way —
covering Header, Payload, Signature, Base64URL encoding, HS256 signing, and how
JWT is validated on the server.

This video is especially useful for:
✔ .NET / ASP.NET Core developers
✔ Web API & backend developers
✔ Interview preparation (JWT, Authentication, Authorization)
✔ Anyone confused about JWT security

Topics covered:
- What is JWT and why it is used
- JWT structure: Header, Payload, Signature
- Base64URL encoding vs encryption
- How HS256 signature is created
- How server validates JWT
- Authentication vs Authorization using claims
- Common JWT misconceptions (very important for interviews)

⚠️ Important Note:
JWT payload is NOT encrypted — it is only Base64 encoded.
Security comes from the signature, not secrecy.

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📌 1-to-1 .NET / Backend Interview Training
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I provide personal 1-to-1 training in:
- C#, .NET, ASP.NET Core
- Web API, JWT, Authentication & Authorization
- Interview-focused real-world concepts

🌐 Website: https://supernovaservices.com
📱 WhatsApp: +91-9331897923

(Feel free to message me directly for personalized guidance.)

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Видео JWT Token Explained in Depth | Header, Payload, Signature | HS256 | .NET & Web API Interview Guide канала Sudipto Kumar Mukherjee