What is a 'harvest now, decrypt later' attack?

Adversaries capture encrypted TLS traffic now, store it cheaply, and decrypt later with quantum computers breaking elliptic curves.

Does upgrading to post-quantum TLS require new certificates?

No—hybrids upgrade key exchange only; your existing RSA/ECDSA certs work unchanged.

Which TLS libraries support ML-KEM hybrids today?

OpenSSL 3.5+, BoringSSL, Go 1.23+, rustls, NSS—all native or via providers.

🔒 Security & Privacy

Quantum Harvest Is Here: Harden Your TLS Stack Against Tomorrow's Decryption

Adversaries are hoarding your encrypted traffic today, waiting for quantum breakthroughs. Here's the no-BS guide to fortifying TLS with ML-KEM hybrids before it's too late.

theAIcatchup Apr 08, 2026 4 min read

Diagram showing hybrid X25519 + ML-KEM key exchange in TLS 1.3 handshake

⚡ Key Takeaways

Hybrid TLS key exchange with ML-KEM blocks 'harvest now, decrypt later' attacks without new certs. 𝕏
Modern libraries like Go 1.23 and OpenSSL 3.5+ enable PQ by default—test yours now. 𝕏
Browser pressure will mandate hybrids soon; upgrade before audits force your hand. 𝕏

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theAIcatchup

Community-driven. Code-first.

#ML-KEM #TLS hybrid #TLS migration #hybrid key exchange #post-quantum cryptography #quantum attacks #quantum threats

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Originally reported by Dev.to

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