JWT claims | What is a JWT claim?

00:00 What are JWT claims?
00:42 Difference between a claim and a key value pair
02:07 public claims are claims with a predefined meaning

According to RFC-7519, a claim is a piece of information about a subject that is represented as a name/value pair consisting of a claim name and a claim value. Most people stumble about claims when they first start to look into JSON Web Tokens. Initially the name claim might be confusing because a claim just seems like a "normal" key value pair. People talk about claims nonetheless because we are not just talking about any key value pair, but about key value pairs that exist within the context of a security token. This security token can be MACed or digitally signed.

Claims are special key value pairs because they are statements made by whoever created the token about a particular subject. So using the term "claim" is just more precise than talking about key/value pairs.

[jgoebel]

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[YogeshwarSinghSisodiya]

Thanks for the quick explanation. I was a bit confused at first reading the official documentation but you explained it really well in 2.5 minutes.

[alessandroformica]

Could not be more clear. Thank you for this!

[hiteshsuthar]

So basically after signature authorization if i want to get my user detail from server, i can use sub claim with unique value to iterate through db.