JWTs are widely used for stateless authentication but can be vulnerable to manipulation and cracking. Attack techniques include brute forcing secrets, algorithm confusion, and claim forgery, emphasizing the importance of proper server-side verification. #JWT #RS256 #HMAC
Keypoints
- JWT (JSON Web Token) is a compact token used for authentication, consisting of header, payload, and signature.
- Obfuscation tactics include base64 encoding and tool-based decoding; some attackers attempt to bypass security controls.
- Common vulnerabilities involve weak secrets, algorithm confusion, and the ‘none’ algorithm attack.
- Secure JWTs by verifying tokens server-side with trusted libraries and avoiding weak or guessable secrets.
- Practical labs and challenges demonstrate how to test, crack, and defend JWT implementations effectively.