Senior LevelAuthentication & Authorization
How will Post-Quantum Cryptography (NIST ML-KEM / ML-DSA) impact digital signatures and TLS handshakes?
❓ Interview Prompt: Explain quantum threat to RSA/ECC via Shor's Algorithm, NIST Post-Quantum Cryptography (ML-KEM, ML-DSA), and hybrid quantum TLS.
Quantum computers running Shor's Algorithm will be capable of breaking RSA and Elliptic Curve Cryptography (ECC / ECDSA / Ed25519) in polynomial time, compromising digital signatures, JWT verification, and TLS handshakes ("Harvest Now, Decrypt Later").
NIST Post-Quantum Cryptography (PQC) Standards (2024+):
1
ML-KEM (Module-Lattice Key Encapsulation / Kyber): Replaces RSA/Diffie-Hellman for quantum-resistant TLS key exchange.
2
ML-DSA (Module-Lattice Digital Signatures / Dilithium): Replaces RSA/ECDSA for quantum-resistant digital signatures and JWT verification.
Hybrid Quantum Transition:
Modern TLS handshakes use Hybrid Schemes combining classical ECDH + ML-KEM to guarantee security against both classical and quantum computers today!
Code Implementation Example
typescript
// Conceptual Post-Quantum Hybrid TLS Handshake
interface HybridQuantumTlsHandshake {
classicalKeyExchange: 'X25519 (ECDH)';
quantumResistantKeyExchange: 'ML-KEM-768 (Kyber)';
combinedSecret: 'HKDF(X25519_Secret + ML-KEM_Secret)';
signatureAlgorithm: 'ML-DSA-65 (Dilithium)';
}💡Hybrid Post-Quantum TLS handshake combining classical X25519 with ML-KEM Kyber.
🎯 Interview Key Takeaway
Post-Quantum Cryptography (ML-KEM / ML-DSA) replaces RSA/ECC to protect digital signatures and TLS against quantum computers running Shor's Algorithm.
#Post-Quantum#PQC#NIST#ML-KEM#ML-DSA#Senior
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