Q28: What is the difference between JSON Web Signatures (JWS) and JSON Web Encryption (JWE)?
- JWS (JSON Web Signature): Encodes header and payload using Base64URL and appends a digital signature. Payload data is clearly readable by anyone who decodes the Base64 string, but signature validation guarantees data integrity and tamper-resistance.
- JWE (JSON Web Encryption): Cryptographically encrypts the payload content using symmetric/asymmetric algorithms. Payload data is completely hidden from unauthorized parties lacking the private decryption key.
Key Takeaways
- JWS provides tamper-proof integrity (Data is readable by all); JWE provides confidential privacy (Data is encrypted).
- Use JWE when transmitting sensitive Personally Identifiable Information (PII) inside token payloads.