Finn Murphy

Introducing Strongpoint MPC: Post-Quantum MPC, Without the Compromises A breakthrough in threshold signing technology brings the security and performance of modern MPC into the quantum and AI era. The migration to post-quantum cryptography is underway. Blockchains, financial institutions, and digital asset infrastructure providers are preparing to replace the cryptographic algorithms that have secured digital ownership for decades. At the same time, advances in artificial intelligence are creating new uncertainty about the long-term security of existing cryptographic systems. But replacing an algorithm is only part of the challenge. The infrastructure built around today's cryptography must also evolve, and few technologies are more important to institutional digital asset security than multi-party computation (MPC). Today, Project Eleven is introducing Strongpoint MPC, a breakthrough in threshold cryptography that makes high-performance, post-quantum MPC practical. Our research demonstrates that migrating to post-quantum cryptography does not have to mean sacrificing the performance, flexibility, and security properties institutions have come to expect from traditional MPC. In fact, our approach can deliver signing performance that exceeds classical ECDSA-based MPC. Strongpoint MPC is available within Strongpoint, Project Eleven’s institutional digital asset custody platform, enabling institutions to use post-quantum threshold signing while maintaining control over their assets and cryptographic key material. The challenge with post-quantum MPC MPC has become a foundational technology for securing digital assets. Rather than entrusting a private key to a single person, device, or system, MPC distributes signing authority across multiple independent parties. Transactions can be authorized without reconstructing the complete private key in any one location. Today, this technology underpins institutional custody solutions used by exchanges, custodians, and financial institutions. Its applications extend well beyond moving funds, including blockchain validators, cross-chain bridges, oracles, and the administrative keys responsible for minting, freezing, and managing tokenized assets. Over the last decade, MPC built around elliptic curve cryptography has become remarkably sophisticated. Institutions can coordinate signatures quickly, support complex approval structures, and operate distributed signing infrastructure with minimal latency. The transition to post-quantum cryptography threatens to disrupt much of that progress. The mathematical properties that enable efficient threshold signing with ECDSA do not translate directly to post-quantum signature schemes. Hash-based signatures, in particular, have historically presented substantial challenges for MPC. Previous approaches suggested that generating a single threshold signature using certain hash-based constructions could take too long to be practical. For an institution processing transactions continuously, that kind of latency would make the technology impractical. The apparent tradeoff was severe: preserve the performance of classical MPC while remaining exposed to future quantum threats, or adopt post-quantum protections at the expense of operational efficiency. We've developed an approach that fundamentally changes that equation. A breakthrough in post-quantum threshold cryptography Project Eleven has developed a new approach to multi-party signing that dramatically improves the efficiency of post-quantum MPC. Our breakthrough enables high-performance threshold signing using hash-based cryptography, with techniques designed to extend across multiple signature schemes. Where earlier approaches suggested impractically long signing times, our architecture enables post-quantum MPC signing that can even outperform traditional ECDSA-based MPC. Strongpoint MPC brings this research into a product designed for real-world institutional deployment. Built for institutional infrastructure Institutional MPC systems must accommodate different architectures, security policies, and operational requirements. A custody provider, a blockchain validator, and a stablecoin issuer may all rely on MPC, but their signing environments and security requirements can differ considerably. Strongpoint MPC has been designed with this flexibility in mind: - High-performance signing: Post-quantum threshold signatures with performance that can exceed traditional ECDSA-based MPC. - Flexible threshold configurations: Supports the most common signing arrangements, with arbitrary threshold configurations under development. - Dealerless key generation: Distributed key generation without requiring a trusted dealer, while retaining the flexibility to accommodate trusted-dealer setups. - Efficient communication: An architecture designed to minimize communication overhead and support signing across distributed infrastructure. - Signature indistinguishability: MPC produces signatures that are indistinguishable from ordinary signatures under the same scheme, without exposing the threshold configuration or participating signers through the signature itself. - Institutional control: Deployment that allows institutions to maintain control over their signing infrastructure and cryptographic key material. Stablecoin issuers, for example, must secure the administrative keys responsible for minting tokens, freezing assets, and managing critical smart contracts. Blockchain validators, cross-chain bridges, and oracles similarly rely on distributed signing infrastructure to protect sensitive operations. All of these systems will eventually need to confront the transition to post-quantum cryptography, and they will not necessarily adopt the same cryptographic algorithms. Strongpoint MPC is designed with this diversity in mind, providing a foundation for supporting multiple signature schemes as cryptographic standards and blockchain requirements evolve. The future of MPC is post-quantum and post-AI Quantum computing threatens the mathematical assumptions underlying today's widely deployed public-key cryptography. Meanwhile, increasingly capable AI systems are accelerating mathematical research and cryptanalysis, introducing additional uncertainty around the long-term security of cryptographic systems. Strongpoint is built around conservative cryptographic assumptions, crypto-agility and institutional control. Strongpoint MPC extends that approach to threshold signing, allowing institutions to adopt quantum-resistant cryptography without abandoning the distributed signing infrastructure they depend on. For years, the industry has operated under the assumption that moving to post-quantum MPC would require meaningful sacrifices in performance and operational flexibility. Our breakthrough demonstrates that this does not have to be the case. That's an exciting development for the future of digital asset security, and an important step toward making the post-quantum transition practical. Learn more about Strongpoint MPC or reach out to our team today. projecteleven.com/strongpoin… projecteleven.com/contact