Signature verification raised

1. How is JWT signature verified?
2. How to verify JWT signature in JavaScript?
3. Why is my JWT signature invalid?

How is JWT signature verified?

To verify JWT claims

Verify that the token is not expired. The aud claim in an ID token and the client_id claim in an access token should match the app client ID that was created in the Amazon Cognito user pool. The issuer ( iss ) claim should match your user pool.

How to verify JWT signature in JavaScript?

To validate a JWT using JWKS in node js:

Extract the JWT from the request's authorization header. Decode the JWT and grab the unique kid (Key ID) property of the token from the header. Find the signature verification key in JWKS with a matching kid property. Verify the token with the filtered JWKs.

Why is my JWT signature invalid?

For Invalid JWT Signature, check if your service account key has expired. Go to your APIs & Services to add a new key if it has.