High Security Question 42 of 215

How does anti-forgery work in ASP.NET MVC?

ASP.NET MVC · Speak this in 60–90 seconds · Faridabad & Delhi NCR

The model does not read letters like humans. It reads these pieces, then predicts the next one.

The server issues a token in the form and validates it on POST to stop CSRF.

Why interviewers care about Security:

This is a process

question about Security.

Panels listen for order,

trade-offs, and what you would actually do on a .NET MVC project - not buzzwords.

Stay structured

Name the idea, why it exists, then one short example.

Close cleanly

End with when you use it and one common pitfall.

Before the model can read a sentence, it goes through these steps:

1
The server issues a
token in the form and validates it on POST to stop CSRF.
2
ValidateAntiForgeryToken on the action
enforces it.
3
Cookie auth forms need
this pattern.
4
Context mix
Attention looks at nearby tokens together.
5
Next token
The model scores what should come next.
6
Decode
IDs turn back into readable text.

Let's see how a real sentence is tokenized (tokens may vary by model):

Input text

“ValidateAntiForgeryToken on the action enforces it.”

Tokenized output

ValidateAntiForgeryTokenontheactionenforcesit

Token IDs (example)

2987408337471632900

Note: Actual tokens and IDs depend on the tokenizer (e.g., GPT, Llama, etc.).

The server issues a token in the form and validates it on POST to stop CSRF. ValidateAntiForgeryToken on the action enforces it.