The best CTOs in deep tech can move fluently between theory and production.
Meet Christopher Portmann, CTO of QMS Network.
Christopher brings more than 20 years of experience across advanced cryptography, decentralized systems, and blockchain protocol design.
After 15 years in academia, a Ph.D. in quantum cryptography, and more than a dozen peer-reviewed publications, he joined Concordium, where he led the design of core blockchain protocols, including novel consensus mechanisms and zero-knowledge-based identity systems.
Working closely with engineering teams, he helped carry those designs from formal security proofs through to production.
At QMS, Christopher leads the protocol’s overall architecture and engineering execution. His work spans cryptographic research, protocol design, the post-quantum transition, and QMS’s long-term research programme on quantum hardware integration.
Few people combine that level of research depth, protocol design, and production experience. For a blockchain preparing for the quantum era, that range matters.
QMS was built around an ambitious technical vision. We’re proud to have Christopher leading the team bringing it to life!
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Meet Christopher Portmann, CTO of QMS Network.
Christopher brings more than 20 years of experience across advanced cryptography, decentralized systems, and blockchain protocol design.
After 15 years in academia, a Ph.D. in quantum cryptography, and more than a dozen peer-reviewed publications, he joined Concordium, where he led the design of core blockchain protocols, including novel consensus mechanisms and zero-knowledge-based identity systems.
Working closely with engineering teams, he helped carry those designs from formal security proofs through to production.
At QMS, Christopher leads the protocol’s overall architecture and engineering execution. His work spans cryptographic research, protocol design, the post-quantum transition, and QMS’s long-term research programme on quantum hardware integration.
Few people combine that level of research depth, protocol design, and production experience. For a blockchain preparing for the quantum era, that range matters.
QMS was built around an ambitious technical vision. We’re proud to have Christopher leading the team bringing it to life!
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This week, 3 developments showed the post-quantum retrofit challenge moving down the stack: from legacy wallet recovery, to transaction validation agility, to core key-management infrastructure.
1️⃣ A practical post-quantum Bitcoin recovery path is now working.
On July 15, Project Eleven unveiled a post-quantum zero-knowledge proof, developed with Binius lead, Jim Posen. It lets users prove that key material higher in a BIP-32 derivation tree produced a given address without revealing the key material itself.
The prototype generates the proof in 243 ms and verifies it in 40 ms on a laptop (M5 MacBook Air, CPU only), with no trusted setup. It remains an unaudited early prototype and would still require explicit protocol support to recover live assets.
This moves one of the hardest parts of post-Q-Day wallet recovery from theory to a concrete engineering path.
2️⃣ Ethereum is gaining signature agility at the transaction layer.
On July 14, Nethermind opened a WIP PR implementing EIP-8141 Frame Transactions (tx type 0x06). The proposal makes the sender explicit in the payload and separates validation from execution, allowing accounts to define their own validation logic instead of being permanently tied to envelope-level ECDSA.
It creates a clean on-ramp for future post-quantum authentication schemes. The implementation is still incomplete and off-by-default.
Changing a core cryptographic assumption embedded in every transaction is expensive, and this is exactly the kind of plumbing work required.
3️⃣ Post-quantum cryptography is entering the key-management standard stack.
On July 15, OASIS Open announced that PKCS #11 Specification v3.2 and Profiles v3.2 have been approved as OASIS Standards. Version 3.2 adds support for post-quantum mechanisms to Cryptoki, the interface used by HSMs, smart cards, and certificate authorities, while the Profiles document defines conformance requirements for interoperability.
Selecting post-quantum algorithms is only the first step. The infrastructure that actually stores keys and authorizes operations now has a path to support them consistently across vendors.
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1️⃣ A practical post-quantum Bitcoin recovery path is now working.
On July 15, Project Eleven unveiled a post-quantum zero-knowledge proof, developed with Binius lead, Jim Posen. It lets users prove that key material higher in a BIP-32 derivation tree produced a given address without revealing the key material itself.
The prototype generates the proof in 243 ms and verifies it in 40 ms on a laptop (M5 MacBook Air, CPU only), with no trusted setup. It remains an unaudited early prototype and would still require explicit protocol support to recover live assets.
This moves one of the hardest parts of post-Q-Day wallet recovery from theory to a concrete engineering path.
2️⃣ Ethereum is gaining signature agility at the transaction layer.
On July 14, Nethermind opened a WIP PR implementing EIP-8141 Frame Transactions (tx type 0x06). The proposal makes the sender explicit in the payload and separates validation from execution, allowing accounts to define their own validation logic instead of being permanently tied to envelope-level ECDSA.
It creates a clean on-ramp for future post-quantum authentication schemes. The implementation is still incomplete and off-by-default.
Changing a core cryptographic assumption embedded in every transaction is expensive, and this is exactly the kind of plumbing work required.
3️⃣ Post-quantum cryptography is entering the key-management standard stack.
On July 15, OASIS Open announced that PKCS #11 Specification v3.2 and Profiles v3.2 have been approved as OASIS Standards. Version 3.2 adds support for post-quantum mechanisms to Cryptoki, the interface used by HSMs, smart cards, and certificate authorities, while the Profiles document defines conformance requirements for interoperability.
Selecting post-quantum algorithms is only the first step. The infrastructure that actually stores keys and authorizes operations now has a path to support them consistently across vendors.
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Many people don’t realize this, banks are further along in post-quantum migration than much of crypto.
Regulators have already pushed financial institutions into multi-year transition plans.
Crypto has a different challenge:
- Wallets
- Exchanges
- Custodians
- Bridges
- Smart contracts
- Users
That’s why post-quantum readiness is easier to design in than retrofit.
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Regulators have already pushed financial institutions into multi-year transition plans.
Crypto has a different challenge:
- Wallets
- Exchanges
- Custodians
- Bridges
- Smart contracts
- Users
That’s why post-quantum readiness is easier to design in than retrofit.
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Quantum computing is a geopolitical race now.
The US is putting ~$2B in CHIPS incentives into nine quantum companies and taking minority equity stakes. DOE is targeting a fault-tolerant system by 2028.
Japan invested heavily in quantum alongside a ~$7B chips-and-quantum package.
The UK added up to £2B in March.
Estimates put China's cumulative public spend as high as $15B, and Beijing put quantum first among its "future industries."
And Google's March paper dropped the qubit estimate for breaking secp256k1 below 500,000, roughly 20x lower than the prior best.
Governments are buying the sword and mandating the shield.
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The US is putting ~$2B in CHIPS incentives into nine quantum companies and taking minority equity stakes. DOE is targeting a fault-tolerant system by 2028.
Japan invested heavily in quantum alongside a ~$7B chips-and-quantum package.
The UK added up to £2B in March.
Estimates put China's cumulative public spend as high as $15B, and Beijing put quantum first among its "future industries."
And Google's March paper dropped the qubit estimate for breaking secp256k1 below 500,000, roughly 20x lower than the prior best.
Governments are buying the sword and mandating the shield.
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Our CTO, Christopher Portmann, has been elected by the community to the 2026 Concordium Governance Committee.
Reflecting on the appointment, Christopher shared that his time with Concordium has shaped how he approaches L1 architecture - lessons he now applies while building QMS Network’s post-quantum-secure PoUW chain. He also said he’s excited to continue contributing as both ecosystems tackle overlapping challenges.
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Reflecting on the appointment, Christopher shared that his time with Concordium has shaped how he approaches L1 architecture - lessons he now applies while building QMS Network’s post-quantum-secure PoUW chain. He also said he’s excited to continue contributing as both ecosystems tackle overlapping challenges.
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The post-quantum transition cannot wait for a perfect signature algorithm. That is the central message of Cloudflare's latest analysis.
ML-DSA-44 is available today, but it carries real costs. Its signatures are 2,420 bytes, compared with 64 bytes for Ed25519, while its public keys are 1,312 bytes versus 32. NIST advanced nine additional candidates to a third round in June, yet Cloudflare estimates that several promising alternatives may not be widely available until 2033–35.
The deployment timeline matters just as much. Dilithium, the scheme that became ML-DSA, entered the NIST competition in November 2017 and was finalized as a standard in August 2024. The first CMVP certificates for an ML-DSA module followed in March 2026, while Cloudflare does not expect the first ML-DSA certificates in the WebPKI until early 2027.
Standardization is only the beginning. Protocol integration, software support, validation and ecosystem-wide migration take years.
Cloudflare is targeting 2029 to become fully post-quantum secure. The June 2026 US executive order adds further urgency: it directs OMB to require federal agencies to transition high-value assets and high-impact systems to post-quantum key establishment by December 31, 2030, and digital signatures by December 31, 2031.
The deeper lesson is architectural. No single post-quantum signature optimizes size, speed, security and implementation simplicity. Systems must be built around those trade-offs while preparing for a lengthy transition.
During that transition, continued support for classical-only authentication can enable downgrade attacks unless the protocol prevents or detects them. Cloudflare notes that simply switching classical cryptography off is not even an option for many sufficiently distributed systems, including the WebPKI.
This closely aligns with the design QMS is working on: block production requires no digital signatures, post-quantum finality runs asynchronously outside the block-production critical path, and PQ signatures for EVM accounts are introduced gradually.
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ML-DSA-44 is available today, but it carries real costs. Its signatures are 2,420 bytes, compared with 64 bytes for Ed25519, while its public keys are 1,312 bytes versus 32. NIST advanced nine additional candidates to a third round in June, yet Cloudflare estimates that several promising alternatives may not be widely available until 2033–35.
The deployment timeline matters just as much. Dilithium, the scheme that became ML-DSA, entered the NIST competition in November 2017 and was finalized as a standard in August 2024. The first CMVP certificates for an ML-DSA module followed in March 2026, while Cloudflare does not expect the first ML-DSA certificates in the WebPKI until early 2027.
Standardization is only the beginning. Protocol integration, software support, validation and ecosystem-wide migration take years.
Cloudflare is targeting 2029 to become fully post-quantum secure. The June 2026 US executive order adds further urgency: it directs OMB to require federal agencies to transition high-value assets and high-impact systems to post-quantum key establishment by December 31, 2030, and digital signatures by December 31, 2031.
The deeper lesson is architectural. No single post-quantum signature optimizes size, speed, security and implementation simplicity. Systems must be built around those trade-offs while preparing for a lengthy transition.
During that transition, continued support for classical-only authentication can enable downgrade attacks unless the protocol prevents or detects them. Cloudflare notes that simply switching classical cryptography off is not even an option for many sufficiently distributed systems, including the WebPKI.
This closely aligns with the design QMS is working on: block production requires no digital signatures, post-quantum finality runs asynchronously outside the block-production critical path, and PQ signatures for EVM accounts are introduced gradually.
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QMS Network Official
The post-quantum transition cannot wait for a perfect signature algorithm. That is the central message of Cloudflare's latest analysis. ML-DSA-44 is available today, but it carries real costs. Its signatures are 2,420 bytes, compared with 64 bytes for Ed25519…
Valuable and timely analysis from the Cloudflare team:
https://blog.cloudflare.com/ml-dsa-will-have-to-do/
https://blog.cloudflare.com/ml-dsa-will-have-to-do/
Cloudflare Blog
Why we cannot wait for better post-quantum signature algorithms
NIST is advancing nine new post-quantum signature algorithms as potential candidates for future standardization. We take a closer look at all of them, and argue that while they are in the works and show great potential, we should use ML-DSA for now — the…
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Meet Egeyar Özlen Saiu, our Lead Protocol Engineer.
Fun fact: the world's most widely used compiler and linker include code she wrote.
Egeyar has spent more than 9yrs building the lower layers of distributed systems, with a focus on consensus protocols and applied cryptography.
Her path to QMS:
→ Core consensus engineering at DFINITY during the design and launch of the Internet Computer
→ Led the development of a distributed secret-management and disaster-recovery system at Lit Protocol
→ Now implementing and hardening QMS’s novel consensus and finality layers
Egeyar joined us in March, and we're truly happy to have her on the team!
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Fun fact: the world's most widely used compiler and linker include code she wrote.
Egeyar has spent more than 9yrs building the lower layers of distributed systems, with a focus on consensus protocols and applied cryptography.
Her path to QMS:
→ Core consensus engineering at DFINITY during the design and launch of the Internet Computer
→ Led the development of a distributed secret-management and disaster-recovery system at Lit Protocol
→ Now implementing and hardening QMS’s novel consensus and finality layers
Egeyar joined us in March, and we're truly happy to have her on the team!
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QMS Network Official
Meet Egeyar Özlen Saiu, our Lead Protocol Engineer. Fun fact: the world's most widely used compiler and linker include code she wrote. Egeyar has spent more than 9yrs building the lower layers of distributed systems, with a focus on consensus protocols and…
If you'd like to learn more, here’s Egeyar's LinkedIn profile: https://www.linkedin.com/in/egeyar/
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Qubits needed to break RSA-2048:
2019: ~20M
2025: under 1M
2026: research claims under 100k
What happens by 2027?
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2019: ~20M
2025: under 1M
2026: research claims under 100k
What happens by 2027?
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Think of a quantum computer as a very sensitive musical instrument that constantly slips out of tune.
Until now, engineers often had to stop the computation, retune the machine, and restart it.
Google’s latest research, published July 22, introduces an AI “technician” that listens to a machine’s error signals and adjusts it while it keeps operating.
The breakthrough: the system can detect its own hardware drift and continuously recalibrate itself during computation. This matters because useful quantum computations will eventually need to run uninterrupted for long periods.
Google demonstrated this on Willow in quantum-memory experiments. While not yet with a long, commercially useful algorithm, they’re making quantum hardware more capable of operating like reliable infrastructure.
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Until now, engineers often had to stop the computation, retune the machine, and restart it.
Google’s latest research, published July 22, introduces an AI “technician” that listens to a machine’s error signals and adjusts it while it keeps operating.
The breakthrough: the system can detect its own hardware drift and continuously recalibrate itself during computation. This matters because useful quantum computations will eventually need to run uninterrupted for long periods.
Google demonstrated this on Willow in quantum-memory experiments. While not yet with a long, commercially useful algorithm, they’re making quantum hardware more capable of operating like reliable infrastructure.
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"Quantum doesn’t matter yet. The machines aren’t here."
That misses how the threat works.
For encrypted data, the risk is Harvest Now, Decrypt Later: capture ciphertext today, decrypt it when the hardware arrives.
On blockchains, transaction histories, signatures, and exposed public keys remain in a permanent public archive. The harvesting is already done on the ledger.
Replacing vulnerable software with quantum-resistant versions is complicated and takes time. That's another reason we need to act before quantum computers are here.
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That misses how the threat works.
For encrypted data, the risk is Harvest Now, Decrypt Later: capture ciphertext today, decrypt it when the hardware arrives.
On blockchains, transaction histories, signatures, and exposed public keys remain in a permanent public archive. The harvesting is already done on the ledger.
Replacing vulnerable software with quantum-resistant versions is complicated and takes time. That's another reason we need to act before quantum computers are here.
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1️⃣ BlackRock, Fidelity, and Coinbase are now paying for Bitcoin's quantum migration.
On 23 July, nine firms launched the Bitcoin Security Consortium: BlackRock, Fidelity Digital Assets, Coinbase, Strategy, Block, Blockstream, Anchorage Digital, ARK Invest, and Galaxy.
$15M over three years for Bitcoin security researchers and open-source developers. Post-quantum preparation is a named focus. Each member funds independently, and the group takes no position on protocol changes.
Migration on a live chain is a collective-action problem. It moves when the biggest holders start writing checks. Even then, the money funds research, nobody can buy a protocol change.
2️⃣ The same day, Coinbase published its post-quantum custody plan: a PQ successor to the key management system securing roughly 99.9% of the assets it custodies, plus a quantum-safe signing pipeline (secure enclaves + threshold cryptography) due within a year.
Custody can re-engineer itself in a year. The settlement layer underneath needs consensus and years. That asymmetry is the retrofit problem in one picture.
QMS is built around this assumption: the next generation of blockchain infrastructure should be quantum-resistant by design and capable of turning network compute into useful work.
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On 23 July, nine firms launched the Bitcoin Security Consortium: BlackRock, Fidelity Digital Assets, Coinbase, Strategy, Block, Blockstream, Anchorage Digital, ARK Invest, and Galaxy.
$15M over three years for Bitcoin security researchers and open-source developers. Post-quantum preparation is a named focus. Each member funds independently, and the group takes no position on protocol changes.
Migration on a live chain is a collective-action problem. It moves when the biggest holders start writing checks. Even then, the money funds research, nobody can buy a protocol change.
2️⃣ The same day, Coinbase published its post-quantum custody plan: a PQ successor to the key management system securing roughly 99.9% of the assets it custodies, plus a quantum-safe signing pipeline (secure enclaves + threshold cryptography) due within a year.
Custody can re-engineer itself in a year. The settlement layer underneath needs consensus and years. That asymmetry is the retrofit problem in one picture.
QMS is built around this assumption: the next generation of blockchain infrastructure should be quantum-resistant by design and capable of turning network compute into useful work.
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QMS Network Official
1️⃣ BlackRock, Fidelity, and Coinbase are now paying for Bitcoin's quantum migration. On 23 July, nine firms launched the Bitcoin Security Consortium: BlackRock, Fidelity Digital Assets, Coinbase, Strategy, Block, Blockstream, Anchorage Digital, ARK Invest…
Keeping an eye on SBC'26 at Stanford this week: Monday's quantum threat session (Google, Ledger, Circle), Tuesday's talk on the economics of proof-of-useful-work, and Friday's affiliated Bitcoin cryptography workshop on post-quantum signatures.
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Even if quantum computers never break a single Bitcoin key, preparing for the threat still comes with two costs.
First, migration.
A Chaincode Labs report estimates that moving the full UTXO set into quantum-resistant outputs could take 305 to 568 days if migration receives 25% of block space.
Then, ongoing overhead.
Depending on the scheme Bitcoin adopts, post-quantum signatures can be roughly 10x to more than 100x larger than today’s 64-byte Schnorr signatures.
The exact bill depends on the design. But retrofitting a live monetary network consumes block space, fees, bandwidth, and coordination before the first key is ever broken.
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First, migration.
A Chaincode Labs report estimates that moving the full UTXO set into quantum-resistant outputs could take 305 to 568 days if migration receives 25% of block space.
Then, ongoing overhead.
Depending on the scheme Bitcoin adopts, post-quantum signatures can be roughly 10x to more than 100x larger than today’s 64-byte Schnorr signatures.
The exact bill depends on the design. But retrofitting a live monetary network consumes block space, fees, bandwidth, and coordination before the first key is ever broken.
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How Proof-of-Useful-Work Rewards the QMS Community
Proof of work has always had one economic problem: the work itself has no value beyond securing the chain. Miners spend energy on hashes no one else wants. The protocol pays for them because no one else will.
QMS keeps the security logic of PoW and puts a second customer beside the protocol. Miners run solvers on real optimization problems posted by enterprise clients, and the same solver run earns from both. One computation, two revenue streams.
The loop is bigger than miners. Finalizers stake the native token and earn a share of every minted block for making history final. Clients pay only for solutions that clear their own bar. Users transact on security that useful work helps fund. Holders sit behind three burn flows — base fees, a fraction of every solution reward, and every unearned finality share — designed to offset dilution as the marketplace grows.
This article covers:
→ The three income streams a QMS miner earns — block rewards, EIP-1559 priority fees, and client solution payments
→ How finalizers, clients, users, and holders each hold a position in the same loop
→ The Ofelimos-based construction that ties every payout to verifiable work — seeded search, checkpoint trails, and a quality-blind lottery
→ Why QUBO is the launch problem class, and how quantum annealers and QAOA machines plug into the same math natively
Every token paid on QMS traces back to work that really happened. When quantum hardware clears client thresholds, it earns through the same marketplace — no protocol change required.
Read the full piece here: https://qms.finance/news/how-proof-of-useful-work-rewards-the-qms-community
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Proof of work has always had one economic problem: the work itself has no value beyond securing the chain. Miners spend energy on hashes no one else wants. The protocol pays for them because no one else will.
QMS keeps the security logic of PoW and puts a second customer beside the protocol. Miners run solvers on real optimization problems posted by enterprise clients, and the same solver run earns from both. One computation, two revenue streams.
The loop is bigger than miners. Finalizers stake the native token and earn a share of every minted block for making history final. Clients pay only for solutions that clear their own bar. Users transact on security that useful work helps fund. Holders sit behind three burn flows — base fees, a fraction of every solution reward, and every unearned finality share — designed to offset dilution as the marketplace grows.
This article covers:
→ The three income streams a QMS miner earns — block rewards, EIP-1559 priority fees, and client solution payments
→ How finalizers, clients, users, and holders each hold a position in the same loop
→ The Ofelimos-based construction that ties every payout to verifiable work — seeded search, checkpoint trails, and a quality-blind lottery
→ Why QUBO is the launch problem class, and how quantum annealers and QAOA machines plug into the same math natively
Every token paid on QMS traces back to work that really happened. When quantum hardware clears client thresholds, it earns through the same marketplace — no protocol change required.
Read the full piece here: https://qms.finance/news/how-proof-of-useful-work-rewards-the-qms-community
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Protocol-wide post-quantum signatures deployed by major L1s:
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Bitcoin has draft BIPs, Ethereum and Solana have roadmaps. The progress is real but production migration is still pending.
As Q-Day approaches, the gap between "planned" and "deployed" becomes the risk.
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Bitcoin has draft BIPs, Ethereum and Solana have roadmaps. The progress is real but production migration is still pending.
As Q-Day approaches, the gap between "planned" and "deployed" becomes the risk.
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A chain where only miners earn doesn't grow. QMS gives every participant a stake in the loop.
Miners and finalizers earn directly. Clients, users, and holders gain from the same loop without running hardware.
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Miners and finalizers earn directly. Clients, users, and holders gain from the same loop without running hardware.
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QMS Network Official
How Proof-of-Useful-Work Rewards the QMS Community Proof of work has always had one economic problem: the work itself has no value beyond securing the chain. Miners spend energy on hashes no one else wants. The protocol pays for them because no one else will.…
Find out more in our latest research article 👆
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Meet the people building QMS.
Allan Brøndum Rasmussen is our Lead Cryptography Engineer.
Allan holds a Master's degree in Mathematics from Aarhus University, covering advanced analysis, number theory, and algebra, followed by a Bachelor's degree in Computer Science. He specialises in high-assurance Rust, cryptographic protocol implementation, and the design of complex distributed systems.
He spent seven years at Systematic A/S as technical lead on large-scale healthcare software, developing strong skills in performance-critical backend systems, database design, and reliable distributed architecture. He then joined Concordium as a Senior Systems Engineer, where he led the rewrite of the blockchain node's execution layer from Haskell to Rust and collaborated with researchers on implementing cryptographic protocols, including zero-knowledge-based identity systems.
Allan joined QMS Network in April, and he's is responsible for ensuring that the security properties established at the research and design level translate faithfully into the implementation.
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Allan Brøndum Rasmussen is our Lead Cryptography Engineer.
Allan holds a Master's degree in Mathematics from Aarhus University, covering advanced analysis, number theory, and algebra, followed by a Bachelor's degree in Computer Science. He specialises in high-assurance Rust, cryptographic protocol implementation, and the design of complex distributed systems.
He spent seven years at Systematic A/S as technical lead on large-scale healthcare software, developing strong skills in performance-critical backend systems, database design, and reliable distributed architecture. He then joined Concordium as a Senior Systems Engineer, where he led the rewrite of the blockchain node's execution layer from Haskell to Rust and collaborated with researchers on implementing cryptographic protocols, including zero-knowledge-based identity systems.
Allan joined QMS Network in April, and he's is responsible for ensuring that the security properties established at the research and design level translate faithfully into the implementation.
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