JWT Structure & RS256 Signature Inspector

Interactive evaluation of Header, Payload Claims, and RS256 vs None-algorithm exploit defenses.

Cryptographic Token Architecture

JWT Header, Payload & RS256 Signature Inspector

✅ SIGNATURE VALID (200 OK)
1. Header (Algorithm & Type):
{
  "alg": "RS256",
  "typ": "JWT"
}
2. Payload (Claims):
{
  "sub": "usr_42",
  "name": "Alice Johnson",
  "role": "USER",
  "exp": 1723650000,
  "iss": "https://auth.corp.io"
}
3. Digital Signature:
RS256(header.payload, privateKey) ✅ Authentic!