Post-Quantum Custody: Project Eleven Lines Up Quantus for Strongpoint
Project Eleven will add support for the Quantus Network to Strongpoint, its institutional custody platform, with Quantus joining as a development partner on work the two firms say is targeted for the first quarter of 2027. The companies disclosed the plan on 7 October 2026, putting post-quantum custody at the centre of a harder question: can institutions manage keys across networks that are each adopting different quantum-resistant cryptography on different timelines?
For custody and treasury teams, the near-term answer is that nothing changes yet. Strongpoint is still being built towards general availability, and Quantus support is a target rather than a shipped feature. The longer-term signal is what matters. As public blockchains begin moving to post-quantum signatures, they are unlikely to agree on one scheme or one migration path, which leaves institutions holding assets across networks with incompatible cryptographic foundations.
What did Project Eleven and Quantus actually announce?
The two companies announced plans, not a live product. Project Eleven intends to extend Strongpoint, which it describes as a custody platform built for the post-quantum and AI era, to the Quantus Network. Quantus will act as a development partner shaping key management, governance and transaction workflows for institutional users. Support is targeted for the first quarter of 2027, with final availability details to follow.
Strongpoint's design premise, on Project Eleven's account, is crypto-agility: separating the institutional control layer, meaning authentication, policies, approvals, key management and audit, from the cryptography of the underlying network. The algorithms beneath can then change without forcing institutions to rebuild their security and operational workflows each time. Quantus provides post-quantum security at the protocol level, and Strongpoint would let institutions hold Quantus keys and approve transactions through the same hardware, policies and audit controls they already use.
Project Eleven's co-founder and chief executive, Alex Pruden, framed the integration as a response to networks adopting new cryptographic standards at different speeds, arguing that institutions need a control layer that survives those changes. Quantus co-founder and chief executive Christopher Smith made the reciprocal point from the network side, saying that adopting new cryptography should not force institutions to replace the governance and operational systems they already depend on.
Why does crypto-agile custody matter now?
Because the migration to quantum-resistant cryptography is fragmenting, and custody sits at the point of maximum exposure. In August 2024, the US National Institute of Standards and Technology finalised its first post-quantum standards, including ML-DSA, the lattice-based signature scheme published as FIPS 204 and the algorithm Quantus uses to sign transactions. Standardising the algorithms is the straightforward part. Rolling them across dozens of live networks, each with its own governance and timeline, is the hard part, and institutions inherit that complexity the moment they custody assets on more than one chain.
The exposure is large. Elliptic curve cryptography, the public-key standard that quantum computers are expected to weaken, secures more than $4 trillion in digital assets across public blockchains, on Project Eleven's own framing of the market it is addressing. Google has said it expects encryption-breaking quantum machines around 2029, and Pruden has previously put a cryptographically relevant quantum computer as early as 2030.
Project Eleven is not a fringe voice making this case. Founded in 2024 by Pruden, a former US Army special operations officer, the New York company raised a $20m Series A in January 2026 led by Castle Island Ventures at a reported $120m post-money valuation, with Coinbase Ventures among its backers, taking its total raised to about $26m. Its earlier work includes Yellowpages, a post-quantum key registry for Bitcoin holders, and a post-quantum testnet built with the Solana Foundation. Strongpoint is the company's move from protocol-level tooling into institutional custody.
Who is Quantus, and why does its size matter?
Quantus is a young, small network, which makes it a sensible design partner and a limited near-term commercial prize. The Quantus Network is a layer-1 proof-of-work blockchain with a 21 million coin supply cap, post-quantum security built in at the protocol level, and privacy by default. It uses ML-DSA for key generation and transaction signatures, with zero-knowledge proofs for scaling and privacy. Its native token traded around $25 in late September 2026 and sits outside the top 30 by market value, a fraction of the assets a custody platform would eventually need to justify bespoke integration work.
That scale cuts both ways. A network engineered for post-quantum cryptography from genesis is a cleaner place to prototype institutional key management than a large chain in mid-migration, which is why a development-partner arrangement makes sense before either product reaches general availability. Quantus also publishes migration.fail, a public tracker of how much of the crypto industry remains vulnerable to quantum computing. The company has argued that none of the top 20 blockchains had implemented post-quantum signatures, and it pegs the industry's quantum-exposed value at about $2.7 trillion. Those are Quantus's own figures, and they double as marketing for the problem Quantus was built to solve, so they are best read as advocacy rather than independent measurement.
What should institutions watch before Q1 2027?
Three things. Whether Strongpoint reaches general availability on schedule, whether the Quantus integration ships as more than a testbed, and whether the crypto-agile claim holds once a second and third network with different schemes are added. A control layer that genuinely abstracts cryptography is valuable. One that works for a single hand-picked partner network is a demonstration. The real test of the architecture is the second integration, not the first.
The other watch item is standards maturity. ML-DSA, as finalised, covers a single signer. The multi-party signing that institutional custody usually depends on has no finalised post-quantum standard yet, an industry-wide gap that will shape how far any custody platform can run on quantum-resistant rails in the near term.
Why This Matters to FinanceX Readers
For custody providers, treasury teams and the institutions that depend on them, this is a signal about architecture, not a product to evaluate today. The post-quantum migration will not arrive as a single switch. It will arrive as a decade of networks changing their cryptography on their own schedules. Institutions that treat crypto-agility as a design requirement now, keeping their controls, approvals and audit trails independent of any one network's algorithms, will adapt as standards shift. Those that hard-wire today's cryptography into their custody stack will pay to rebuild it later.
Project Eleven and Quantus have announced a plan, not a finished system, and the honest read is that both the platform and the network are early. The idea underneath, that institutional custody must become cryptographically agile before Q-Day rather than after, is the part worth tracking.
