NymVPN için kuantum sonrası (post-kuantum) anahtarların tanıtımı

Şimdi bir adım geriye gidelim ve bunun veri güvenliği için neden önemli olduğunu düşünelim.

Kuantum sonrası şifreleme nedir?

Modern şifreleme, çözülmesi zor matematiksel problemlere dayanır. RSA, çok büyük sayıların çarpanlara ayrılmasının neredeyse imkânsız olmasına dayanır. Eliptik Eğri Kriptografisi (ECC) ise ayrık logaritma probleminin zorluğuna ilişkin benzer bir varsayıma dayanır. Bu gibi şifreleme protokolleri VPN tünellerini, bankacılık oturumlarını, mesajlaşma uygulamalarını ve web trafiğinin çoğunu koruyan temel güvenlik mekanizmalarıdır.

Kuantum bilgisayarlar bu varsayımlara klasik bilgisayarlardan farklı şekilde saldırır. Örneğin, yeterince güçlü bir kuantum makinesinde çalıştırılan Shor'un algoritması büyük sayıları polinom zamanda çarpanlarına ayırabilir. Bu ölçekte uygulanabilir hale geldiği anda, RSA ve ECC zor problemler olmaktan çıkar ve çözülebilir problemler haline gelirler. Gerçekte, hala bu ilkellere dayanan her sistem geriye dönük olarak okunabilir hale gelir.

Kuantum sonrası risk tartışmalarının çoğu, kuantum bilgisayarların ne zaman oraya ulaşacağı sorusuna odaklanmaktadır. Gizlilik açısından bakıldığında bu yanlış bir soru çünkü asıl tehdit donanımın gelmesini beklemek değil. Bu tehdit, halihazırda yirmi yılı aşkın bir süredir devam eden kitlesel gözetim ve veri toplama faaliyetleridir.

"Şimdi topla, sonra çöz" sorunu

Yeterli kaynaklara sahip düşmanların İSS'lerden devlet istihbarat kurumlarına kadar her yerde şifrelenmiş verilerinizden değer toplamaya başlamak için kuantum bilgisayarlara ihtiyacı yoktur. They can record it now, store it, and decrypt it once the hardware catches up. For traffic that needs to stay private for years or decades – from political organizing, financial activity, medical records, or journalism – the window of exposure is already open.

We know that surveillance programmes at scale have operated this way. The economics are straightforward: storage is cheap, and the contents of today’s encrypted traffic will still be valuable when decryption eventually becomes possible.

This is exactly why Nym built the Noise Generating Mixnet in the first place: to protect metadata from surveillance that is happening right now, not just in theoretical futures. Post-quantum encryption is an extension of the same logic.

The NIST timeline

2024 yılında, ABD National Institute of Standards and Technology (NIST) set a formal deprecation timeline for RSA and ECC-based systems, with a full transition to post-quantum algorithms required by 2035. Candidate algorithms – including CRYSTALS-Kyber (ML-KEM) for key exchange and CRYSTALS-Dilithium and FALCON for digital signatures – have been selected for standardization.

The 2035 deadline sounds distant. Building a post-quantum cryptographic stack across an entire architecture, tested and deployed at scale, does not happen quickly. For a decentralized VPN handling real user traffic in adversarial conditions, the right time to start is not when the mandate arrives. It was several years ago. The second-best time is now.

Nym's roadmap for post-quantum security

Nym's Chief Scientific Officer Ania Piotrowska outlined Nym’s roadmap for post-quantum security last year. The Lewes Protocol marks the completion of the first of three phases, each hardening a different layer of the architecture.

Phase 1: ✅ Post-quantum key exchange

The Lewes Protocol now makes post-quantum key exchange live across all platforms in NymVPN v2026.7. With quantum-resistant key exchange for channel establishment, the Lewes Protocol not only improves security against post-quantum threats but also significantly improves connection speed.

Phase 2: Post-quantum protection for mix node communications

The next step moves the protection inward to the communication channels between mix nodes themselves. Applying post-quantum key exchange at this level means messages routed through the network gain quantum resistance at every relay, not just at the entry point.

Phase 3: Post-quantum protection in the Sphinx packet format

Sphinx is the cryptographic packet format that makes the mixnet work. It provides metadata-private message routing by encapsulating traffic in layers that each node can peel without learning anything about the origin, destination, or content of the packet.

Enhancing Sphinx with post-quantum key exchange will close the final gap, ensuring the core of the Nym mixnet is as resistant to quantum cryptanalysis as it is to classical surveillance techniques. You can read more about Nym’s plans for post-quantum mixnet security here.

When all three phases are complete, post-quantum protection will run through every layer of a NymVPN connection: the entry handshake, the mixnet, and the packet routing mechanism.

Sonuç

The post-quantum era isn't something to prepare for after the fact. The adversaries Nym was built to protect against – mass surveillance programmes, intelligence agencies, authoritarian governments – are not waiting either. They're collecting. The Lewes Protocol is the first answer to that.

Kaynaklar

1. NIST Internal Report: Transition to Post-Quantum Cryptography Standards
2. Chen, Moody, Yi-Kai Liu (2022): Post-Quantum Cryptography: Additional Digital Signature Schemes