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Attacking and Securing JWT - OWASP

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By @airman604 for @OWASPVanouverAttacking and Securing JWT$ whoamiJWTJWT = JSON Web TokensDefined in RFC 7519Extensively used on the web, for example in OpenID ConnectWhy people use JWT? (Somewhat) secure way to exchange authentication information ( claims ) Stateless session management, no session cookies Once configured (establishes trust), backend doesn t need to talk to authorization serverTypical UseA Closer Token Token Token Header{ "typ": "JWT", "alg": "RS256", "kid": "MkUyNTAxMzEwQ0RCRTlGOERBODlEQzIxQ0IyQTk 1MjM2MDRGRTYxMw"}JWT Token Payload (Claims){ " ": false, " ": true, "iss": " ", "sub": "auth0|5d434b9a1035a80caddb9513", "aud": [ " ", " " ], "iat": 1566941211, "exp": 1566948411, "azp".}

JWT Secret Brute Forcing RFC 7518 (JSON Web Algorithms) states that "A key of the same size as the hash output (for instance, 256 bits for "HS256") or larger MUST be used with this

  Brute

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