#quantumkeydistribution

Photon number resolving detector

Researchers have made major advances in photon-number-resolving (PNR) detection, a key technology for quantum computing and secure communications. These groups have overcome traditional detectors to count light particles with unprecedented accuracy, providing a robust barrier against modern cyberattacks.

The Light-Counting Challenge

High-performance quantum technologies like quantum imaging and sensing require the detection and characterization of many-photon states. Conventional single-photon detectors can detect light, but they often have problems distinguishing between one, two, or three photons. This restriction is hazardous because an eavesdropper can employ “multi-photon pairs” to steal information unnoticed in Quantum Key Distribution (QKD).

Emitter Cascade: New Architecture

Researchers from the University of Waterloo have devised a PNR detector system using a cascade of waveguide-coupled Λ-type emitters. Instead of using beamsplitters to distribute photons among detectors, this innovative method uses a chain of atoms or quantum dots coupled to a chiral (one-way) waveguide.

This system employs Single-Photon Raman Interaction. This arrangement uses a Λ-type atom as a “photon-activated switch”. The first photon of a light pulse is coherently redirected to a different output port and detected after interacting with the atom. Importantly, after “capturing” one photon, the atom becomes transparent to the pulse's other photons. Researchers can cascade emitters to deterministically “peel off” and count photons.

Guide to Nonlinear Frontier

A major focus at Waterloo was the shift from linear to nonlinear regimes. Photons are far apart in the linear regime, making them independent. As quantum networks accelerate and pulses compress, photons overlap during the “emitter’s lifetime”.

Multiple photons arriving within the atomic response time generate nonlinear interactions. The researchers found that these interactions cause “saturation effects” and photon correlations like bunching and anti-bunching. The researchers used Green's function formalisms and the quantum trajectory technique to generate complex “scattering matrices” to predict how these interactions affect detector accuracy. They found that increasing the number of emitters in the cascade can compensate for nonlinearity issues and outperform beamsplitter-based detectors in practice.

Protection against “Photon Number Splitting”

At the same time, an Indian Institute of Technology Delhi team proved that multi-photon emissions degrade quantum entanglement. Entanglement, or “spooky action at a distance,” underpins safe quantum communication, but it is not perfect.

Single, double, and triple photon pair events produced by spontaneous parametric down-conversion (SPDC) were separated and measured using parallel superconducting nanowire single-photon detectors at IIT Delhi. Increased multi-photon pair generation causes a “marked reduction” in the Bell parameter (S parameter), a standard indicator of entanglement quality.

Security and technical issues arise from this degradation. In a Photon Number Splitting (PNS) attack, Eve, an eavesdropper, intercepts one photon from a multi-photon state while the rest pass to the permitted recipient. Eve can steal the cryptographic key without alarming a typical detector since the whole entanglement appears intact.

The researchers showed that PNR detectors solve this problem. Accurate photon counts in real time allow genuine parties to discover “anomalies in their expected correlations” and eliminate compromised multi-photon states. This allows Alice and Bob, quantum communicators, to detect eavesdropping and maintain their secure connection.

Technical Specifications and Performance

Using different voltage thresholds, the IIT Delhi P-SNSPDs can resolve up to four photons, proving their remarkable PNR capabilities. These detectors have fast recovery times (80 ps) and high efficiency (up to 99.5%, according to studies).

The Waterloo team's emitter-based device offers high performance using quantum dots in photonic crystal waveguides. Experimental platforms have achieved coupling efficiencies of 0.98 and directionality close to unity. When coupling rates reach GHz, photon absorption and re-emission become fast and efficient, making these devices ideal for high-speed quantum processors.

Road Ahead

Both research say effective PNR detection is “essential for achieving robust, secure quantum communication”. Traditional spatial demultiplexing algorithms have been used, but the deterministic emitter cascade allows new quantum tomography forms and higher precision.

Researchers demonstrated a single-photon edge in quantum cryptography by developing a robust quantum coin flipping protocol using a deterministic quantum dot light source. Quantum key distribution typically targets trusted partners, while this experiment addresses insecure participants.

Instead of laser pulses, the team used on-demand single photons, which improved performance and minimized cheating. A combination of high-efficiency detectors and advanced polarization-state encoding ensured security across lossy channels. This milestone implies that a quantum internet will require sub-Poissonian light to build complex cryptography primitives. These findings show that high-performance quantum sources improve secure communication beyond key exchange.

Researchers Get “Coin Flipping” Idea for Quantum Web

Researchers have advanced quantum cryptography beyond "secret key" sharing, paving the way for a physically secure global communication network. A team from the Technical University of Berlin, the Chinese Academy of Sciences, and the University of Münster implemented a secure “quantum coin flipping” protocol using individual light particles, proving that quantum physics can protect users even when they don't trust each other.

Quantum Key Distribution (QKD) has been the gold standard in quantum security for decades since it lets two friends construct a secret key in perfect secrecy. QKD is limited, according to academics, because it assumes confidence. From digital voting and online casinos to complex corporate contracts, strangers or rivals with every motivation to cheat often communicate.

The “Distrustful” Setting Challenge

Manuel Blum coined “coin flipping by telephone” in 1983. Simple: a coin toss between two distant people should be fair so neither can affect the outcome. In the future, powerful computers could solve this complex classical mathematics.

In place of mathematical complexity, quantum mechanics uses natural principles to answer. Initial laser pulse research had basic limitations. A clever cheater could “peek” at the coin before it lands by intercepting one photon while letting others through since lasers create “faint pulses” that sometimes comprise many photons.

Deterministic Solution

Berlin's team used a silicon quantum dot-based deterministic single-photon generator to circumvent this. This “artificial atom” can release one photon at a time, unlike a probabilistic laser. The researchers' "purcell enhancement," which involved inserting this quantum dot inside a micro-cavity, dramatically enhanced the source's speed and efficiency. “Our work represents a significant step towards the implementation of complex cryptographic tasks in a future quantum internet by demonstrating a single-photon quantum advantage in a cryptographic primitive beyond QKD,” the researchers stated.

Trial: Bob vs. Alice

Alice, one of the experimenters, generates 50,000 pulses with one photon encoded with a certain polarization. These states are slightly skewed to maximize security compared to regular quantum bits. Bob receives them from Alice and randomly measures them.

Bob is prevented from cheating by several protocol checks. Bob must reveal which photon he first spotted without knowing its condition. After that, Alice gives over the photon "key". As Bob's measurement deviates from Alice's original condition, the protocol stops the cheating attempt.

One of the project's greatest technological successes was a 2.8% Quantum Bit Error Ratio (QBER). This accuracy was needed because quantum coin flipping is more error-prone than standard QKD. The scientists used advanced “Manchester coding” to triple the internal clock rate to 160 MHz to minimize electrical drifts, which commonly cause errors in random sequences.

Real-World Results

Researchers securely flipped about 1,500 coins each second. The system's performance over simulated fiber-optic distances was assessed. At 3 dB signal loss, the "quantum advantage," the advantage quantum physics has over the greatest classical cheating approach, persisted, but noise eliminated it at 6 dB.

Most crucially, the experiment showed that single photons outperform laser bursts. Laser intensity can be reduced to a very low level, but coin flipping would be quite slow. Single-photon sources offer better performance and “reduced bias”.

Future: Casinos to Clouds

This work affects the Future Quantum Internet architecture. These single-photon sources could provide “commitment schemes” for digital auctions, “leader election” in decentralized networks, and fair online games in addition to coin flips.

The team is preparing for future milestones. Using “telecom wavelength” photons, scientists want to improve communication range to tens of kilometers. By increasing the clock rate to the GHz region, which is attainable with their quantum dot, they anticipate they may reach 24,000 secure coin flips per second.

Romania's Historic Quantum Network (RoNaQCI) Protects Over 1,500 Kilometres of National Infrastructure with IonQ and ID Quantique

Overview

By building a massive quantum communication network in Romania, IonQ reached a major cybersecurity milestone in Europe. This infrastructure protects essential data transfers from sophisticated internet threats with over 1,500 kilometers of fiber and Quantum Key Distribution. The project links six major metropolitan areas and several academic institutions as part of EuroQCI. Quantum-secure technologies defend government, healthcare, and banking nationally, as shown by this deployment. This achievement strengthens the company's position as the world's premier quantum networking solutions provider.

RouNaQCI: Romanian National Quantum Communication Infrastructure

ID Quantique (IDQ), a subsidiary of IonQ (NYSE: IONQ), announced today that it has deployed the technology behind the Romanian National Quantum Communication Infrastructure (RoNaQCI). This milestone built one of Europe's largest and most complex operational Quantum Key Distribution (QKD) networks. This deployment is second only to Chinese infrastructure in importance worldwide.

National Science and Technology University To deploy RoNaQCI, POLITEHNICA Bucharest and RoEduNet, Romania's research and education network, collaborated. This countrywide network uses solely IonQ's commercially available QKD technology, proving that quantum-secure communications are scalable and functional for national infrastructure.

A New European Quantum Security Benchmark

The deployment is essential in the EU's objective to protect vital communications from cyberthreats, particularly those from powerful quantum computers. Romania is a leader in the EuroQCI effort to build a continental quantum communication network utilizing this technology.

The Romanian network is vast. The 36 quantum-secured wires extend nearly 1,500 kilometers. Interestingly, this one country project has installed almost 20% of Europe's terrestrial quantum communications equipment.

"IonQ is proud to support this extensive quantum-secure communications network across Europe," commented Niccolo de Masi, chairman and CEO of IonQ. He noted that the deployment shows QKD's potential to scale to protect national security and private data in government, healthcare, research, education, and data centers.

Links major metropolitan hubs

Bucharest, Iași, Timișoara, Craiova, Cluj-Napoca, and Constanța—six of Romania's biggest cities—are connected by the high-security RoNaQCI network. End-to-end encryption keys ensure data security on the network.

Wavelength Division Multiplexing is used in the advanced design. This allows the transmission of quantum keys in the C-band alongside ordinary data traffic in the network's urban areas, indicating quantum security is possible in present telecommunications infrastructures.

Prof. Pantelimon George Popescu, Head of the Quantum Computing Laboratory at POLITEHNICA Bucharest, says the infrastructure provides a “practical foundation for secure data exchange” and promotes the European goal of interoperable quantum networks.

A Teamwork Success

A collaborative approach made RoNaQCI deployment successful. Twelve Romanian institutions, seven research institutes, and three government organizations joined the effort. ID Quantique supplied all national QKD systems to ensure network performance and compatibility.

Grégoire Ribordy, vice president of science at IonQ and co-founder of ID Quantique, said the network is the result of over 20 years of work to make quantum key distribution a reliable infrastructure for businesses and governments. He added that the project shows that present telecommunications infrastructure can support large, complex networks.

IonQ Expands throughout Europe

IonQ has taken several risks to accelerate quantum-secure communications in EMEA, including Romania. These are recent firm activities:

Slovakia will establish its first quantum communication network with the Slovak Academy of Sciences.

Launch of Geneva Quantum Network.

Italy: Supporting the Q-Alliance with Italian authorities.

Oxford, UK: IonQ's EMEA headquarters shows its commitment to European quantum efforts.

Leading Quantum Era

IonQ is smashing quantum computing and networking records. The company set a global record of 99.99% two-qubit gate fidelity in 2025. IonQ Tempo, their next computer, will help partners like AstraZeneca, NVIDIA, and Amazon Web Services innovate in financial modeling, materials research, and medication development.

IonQ is becoming the top “merchant supplier” of integrated quantum solutions with operations in South Korea, Switzerland, networking, computing, and sensing with over 1,300 employees.

LuxQuanta News

LuxQuanta, a Spanish deep-tech company, completed a proof of concept (PoC) for its NOVA LQ quantum cybersecurity system, advancing European quantum sovereignty. This confirmation by the MADQuantum-CM project proves that quantum-safe communications are now deployable for urban fiber networks, not just lab experiments.

The “MADQ Business Venture” program used MADQCI, the Community of Madrid's quantum communications infrastructure, for the experiments. LuxQuanta repeatable technical data replicates the unique operational constraints of a metropolitan network, such as traffic, noise, and fiber loss, enabling large-scale quantum key distribution (QKD) deployment.

Getting Past 100km and Living Together

One of this proof of concept's biggest achievements is constant quantum key distribution over 100 kilometers of standard single-mode optical fiber. Quantum signals, like regular data, are brittle and difficult to convey great distances. Yet LuxQuanta's CV-QKD method has proven reliable.

NOVA LQ could fully coexist on the same fiber with classical DWDM traffic, which was most crucial. This means data center and telecom operators can protect their networks without investing money on “dark fiber” or parallel infrastructure. Businesses can also add quantum security to their active networks, reducing complexity and deployment costs.

Scalable Modern City Architecture

Scalability becomes infrastructure owners' key priority as metropolitan networks become increasingly complex. One transmitter serves several receivers in point-to-multipoint configurations, which the MADQuantum Project examined.

This architectural breakthrough revolutionizes quantum security economics. By minimizing node hardware duplication, operators can save integration time and simplify network designs. Thus, NOVA LQ is perfect for:

Connections between data centers

Government and vital infrastructure Metropolitan fiber networks serve varied commercial clients Information-Theoretic Future Threat Security This technique is urgent because of “Harvest now, decrypt later” attacks, in which malicious actors intercept encrypted data today to decrypt it when large-scale quantum computers are accessible.

NOVA LQ from LuxQuanta provides information-theoretic security by combining QKD at the physical layer. Computational assumptions do not affect this security, unlike classical encryption, which depends on mathematical difficulty. It protects against advanced cyberthreats and future quantum computing cryptography threats.

Information-theoretic security applies even to attackers with infinite computational power. The remark to independence from computational assumptions contextualizes this cryptography knowledge.

Expanding Global Footprint

This Madrid PoC victory is the latest major event for Barcelona-based firm. Big Sur Ventures and A&G led LuxQuanta's €8 million Series A in October 2025. EIC Fund, Corning, and GTD also contributed.

Additionally, the company is expanding globally. LuxQuanta showed a quantum-safe network at the AWS Singapore Innovation Hub a few months ago, protecting financial institution data center infrastructure.

Vision and Project Support

The MADQuantum-CM project is part of the EU's Next Generation EU and Spain's Recovery, Transformation, and Resilience Plan.

The PoC data provides a solid foundation for operators and infrastructure owners to evaluate quantum-secure deployments on existing fiber networks, according to LuxQuanta CEO Vanesa Díaz.

Threshold Distillation Protocols

Noise is the biggest obstacle to a global quantum internet. Environmental interference and experimental errors impair quantum states, which are delicate. To combat this, scientists have long utilized “distillation,” which reduces many irregular quantum signals to a few faultless ones. But a recent study by Okinawa Institute of Science and Technology (OIST) experts explains how to do this more efficiently than thought.

The group introduced Threshold Quantum Distillation, which lets a network "clean" its quantum interactions with a few members. This discovery could lessen the technological obstacles for secure communication and distributed quantum computing by reducing the number of people needed to maintain the network.

The Threshold Secret

Traditional security relies on “threshold distillation protocols”. The Shamir Secret-Sharing method can keep a secret for decades if the “threshold” of people agrees to divulge it. The authors note that classical cryptography requires threshold distillation procedures for privacy, security, and fault tolerance. Following similar reasoning to the quantum realm, OIST researchers found that not all network members must participate in the “purification” of quantum resources like guiding or entanglement.

Traditional distillation procedures are often inefficient due to the need for direct or indirect input from all participants. The new “Threshold” technique changes the rules so that just a few “active” people in a big network must take local actions, filtering the signal, while the others can observe passively.

One GHZ Miracle: Enough

One of the study's most surprising findings is GHZ states, a high-dimensional quantum connection that connects several participants sensitively.

They estimate that 12 hands would clean a link between 12 users in a noisy network. However, the researchers showed that GHZ states can extract perfect entanglement with one party, regardless of network size.

If a vast network of 100 nodes shares a noisy GHZ signal, a single member can execute “local filtering” to purify the global connection. Since GHZ entanglement is uniquely “tunable” by one party, the state changes worldwide when one person applies the right measurement or filter, enabling almost perfect fidelity.

Harder Tasks: W-State Challenge

Quantum states cooperate. The study also examined W-states, another popular quantum connection used in communication. W-states are more “sturdier” and less manipulable than GHZ.

The study found more stricter criteria for these states: almost everyone in the network must cooperate to clean the signal. At least four of the network's five members must filter. This research shows a strong mathematical relationship between a state's “separability” and distillation ease, or how intertwined the parties are.

“Steering” Security Future

The work applies these thresholds to “quantum steering” as well as entanglement. Steering occurs when one person's measurement can swiftly change the state of another's particle, even if the instrument is not fully specified or trusted.

A threshold distillation algorithm can purify a network for steering and filter it for entanglement, the researchers found. In cases of unknown or faulty network components, this distillation “one-stop shop” may make secure communication systems easier to design.

From Theory to Lab

Not only are these procedures theoretical. The researchers offer a conceptual experiment to use standard optical equipment for these activities.

Cascades of tunable beamsplitters can be used to create state-purifying “filters”. These beamsplitters can be precisely modified to filter light for distillation by one party. Because of this, modern quantum labs can adopt the “Threshold” method.

This Matters for Global Networks

Larger and more complex quantum networks have a considerable coordination “cost”. Coordination of a purifying process by 1,000 nodes in a global network is a huge engineering challenge.

This study shows that high-fidelity correlations (usually above 99% fidelity) may be produced with a tiny sample, providing a scalable blueprint for future quantum infrastructure. These threshold distillation techniques for distributed quantum computing or quantum key distribution ensure that the “perfect” quantum resource can be extracted even when some network segments are not participating.

QIC News

The struggle to secure the world's most sensitive data has moved from theoretical physics to national security and economic strategy as the globe enters a new technological era. QIC, the national industry-led coalition representing Canada's fast emerging quantum ecosystem, joined YQS2026, the 2026 Year of Quantum Security.

This global campaign unites government leaders, industry titans, and intellectual pioneers. Its goal is unique and urgent: to accelerate the global transition to quantum-resilient infrastructure before a “cryptographic sunset”. QIC is joining this effort to represent the Canadian quantum sector's commitment to working with trusted international partners to advance digital security alongside technical innovation.

Crisis: “Q-Day” and the Ticking Clock

Mathematical challenges beyond the capabilities of traditional computers have locked up medical information, banking transactions, and classified state secrets in modern digital life. However, large-scale quantum computers may render RSA and ECC obsolete.

The time a quantum computer can break these encryptions is called “Q-Day” by experts. While such a machine may still be in development, “Harvest Now, Decrypt Later” (HNDL) attacks pose a concern. Malicious actors intercept and store encrypted data to decipher it when quantum technology evolves. Any organization handling long-lived data must abandon the “wait and see” strategy.

Canadian “Quantum Superpower” Status

Canada has earned the title of “Quantum Superpower” for its quantum achievements. The nation has world-class deep-tech hubs in Waterloo's "Quantum Valley," Toronto, Montreal, and Vancouver. These regions have produced some of the world's most advanced PQC and QKD organizations.

Lisa Lambert, CEO of QIC, noted Canada's history in this business and that Canadian inventors are creating the hardware and software needed for long-term trust and resilience. QIC joins YQS2026 to strengthen Canada's 40+ quantum companies' global network. Besides theoretical studies, these corporations are actively using technology to defend the global economy.

Three Action Pillars: YQS2026 Roadmap

Beyond a commemorative title, the Year of Quantum Security is a year-long mobilization to bridge technical capabilities and policy execution. The program's launch in Washington, D.C., was sponsored by a wide range of partners, including Toronto-based chief presenter.

Matt Cimaglia, YQS2026 primary organizer and Quantum Coast Capital founder, says quantum security is now a “present responsibility”. The initiative will focus on three primary pillars in 2026 to meet this obligation:

Policy Alignment: Working with nations to harmonize PQC procedures to global benchmarks like NIST cryptography standards.

Industry Education: Helping IT directors and C-suite executives use “Quantum Risk Assessment” to identify company flaws.

Investment and Scale: Giving future "shield" builders the finance and markets they need to deploy their solutions globally.

Economic Stakes and “Point of No Return”

National security dominates the press, but the quantum leap's economic effects are astounding. The global financial system relies on digital trust. Blockchain ledger or SWIFT financial network encryption breaches might paralyze the global economy.

Canada presents itself as a data “Safe Harbor” by leading YQS2026. Being “quantum-ready” is becoming a requirement for global trade and lucrative defense contracts for local companies.

The focal year is 2026 for strategic reasons. Businesses with long-lived data face the “point of no return” according to experts. A company that owns infrastructure designs, long-term health records, or other data that must remain secret for 10 to 20 years must use quantum-secure technologies immediately to prevent decoding of intercepted data.

Future Collaboration and Practice

The quantum problem is too big for any single nation to handle, as YQS2026 shows. It needs a global “trusted ecosystem” of partners. Public and business stakeholders should expect high-level meetings, white papers, and technological demonstrations in 2026. QIC's “Quantum, Eh?” philosophy of world-class academic rigor and pragmatic, industry-led problem-solving will be vital to these events.

SpeQtral and Addvalue Launch Integrated Satellite QKD Solutions in Singapore

SpeQtral and Addvalue IDRS

SpeQtral and Addvalue, Singaporean companies, partnered in February 2026 to produce quantum-secure satellite services. This alliance combines quantum key distribution (QKD) with real-time data relay technologies to offer secure, continuous communications. The cooperation hopes to decrease ground station scheduling delays for low-earth orbit missions by using Addvalue's IDRS connection. This endeavor helps Singapore's space policy by fostering domestic innovation and building global networks for cryptography issues. The combined business hopes to turn quantum communications experiments into reliable, commercial space economy security solutions.

SpeQtral Pte. Ltd. and Addvalue Innovation Pte. Ltd. have signed an MoU to develop a quantum key distribution (QKD) satellite system, marking a significant advancement in the global telecommunications and space industries. The Space Summit 2026 agreement advances Singapore's goal of quantum-secure, robust communications for next-generation networks.

In attendance were Addvalue CEO Tan Khai Pang and SpeQtral Co-founder and CEO Lum Chune Yang. The Executive Director of the Office for Space Technology & Industry (OSTIn), Jonathan Hung, considered this collaboration important for the nation.

Bringing Demonstration and Service Together

This cooperation aims to commercialize space-based quantum technology from experimental demonstrations. Addvalue provides its Singapore-developed InterSatellite Data Relay System (IDRS) and SpeQtral provides quantum knowledge.

The MoU requires the two companies to study Quantum Communication satellite constellation architecture and Concept of Operations. To meet real-world operational objectives, this study will create service-oriented QKD solutions that can manage real-time tasking and rapid key setup requests.

Lum Chune Yang, SpeQtral's CEO, stressed that “classical” connection is just as crucial as quantum. “Space-based QKD must be paired with reliable, real-time classical connectivity to translate demonstrations into services,” added Lum. SpeQtral can improve QKD passes, post-processing, and key distribution for prospective clients by integrating with Addvalue's IDRS.

IDRS and SpeQtre's Power

The collaboration leverages both institutions' strengths. Addvalue's revolutionary IDRS allows Low Earth Orbit (LEO) satellites to communicate 24/7 via GEO (Geostationary) links. IDRS, launched in November 2020 with Inmarsat (now Viasat), provides continuous IP sessions with data speeds over 200 kbps.

This “always-on” connection transforms quantum communications. It considerably reduces operating latency compared to standard ground station scheduling, which requires satellites to wait until they are above a ground station to receive instructions. IDRS excels at time-sensitive tasks like QKD service optimization and orchestration.

SpeQtral has significant “space heritage”. The company and RAL Space launched SpeQtre in November 2025. The SpeQtre project, which is being commissioned, uses a 12U CubeSat to demonstrate space-to-ground quantum communications, making Singapore a leader in quantum-secure networking.

Strategic Importance for Singapore and Others The agreement coincides with a global push to operationalize satellite-based QKD as the “quantum revolution” approaches. SpeQtral builds worldwide quantum networks to protect sovereign and business telecommunications from conventional and quantum-based cyberattacks as quantum computers challenge cryptographic norms.

Singapore is poised to claim a large share of the US$1.8 trillion space industry by 2035. The SpeQtral-Addvalue collaboration emphasizes operational availability and service readiness to keep Singapore-developed technology ahead of this transformation.

Local quantum-safe deployment attempts are expected to generate downstream demand for space-provided QKD keys, which must interact seamlessly with terrestrial fibre-based QKD infrastructure. This alliance supports Singapore's policy to strengthen its space sector and foster international collaboration by addressing the “satellite service layer” and improved resilience through IDRS.

Imagining the Quantum Internet

As the two companies explore go-to-market strategies, the goal is to build the quantum internet. LEO operations increasingly require fleetwide coordination and on-demand communications, said Addvalue CEO Tan Khai Pang. Tan said IDRS' 24/7 relay and secure IP continuity might support quantum secure services and speed up QKD satellite commissioning and operations.

SpeQtral and Addvalue are constructing a secure worldwide communication network that can withstand technological changes in the next decade by combining terrestrial and space-based technology.

Quantum Security Space Davos Roundtable

At Davos' 2026 agenda, global leaders focused on space's mounting concerns rather than the economy.WISeKey International Holding Ltd. held a high-level Quantum Security Space Roundtable with defense, space, and cybersecurity professionals on 30 January 2026.. The agreement was clear: global space infrastructure needs post-quantum technology.

Space Systems Impending Vulnerability

The roundtable was driven by quantum computing's rapid growth, which threatens RSA and ECC. Vulnerabilities threaten satellite communications, command-and-control linkages, and important space data.

Davos participants say post-quantum space security must prioritize quantum-resistant cryptography (PQC) for long-term resilience. Satellites cannot be retrofitted, thus quantum-ready designs must be included from the outset.

Innovative Technology: KEMs and Hardware Trust

Many post-quantum security traits were identified to mitigate these concerns. Hybrid cryptography methods like Triple Key Encapsulation are fascinating. These hybrid methods protect satellite-ground station communications using PQC and normal elliptic-curve encryption during the classical-quantum computing transition.

It also emphasized hardware-anchored trust. For reliable identities and tamper-resistant processes, modern space systems use quantum-resistant semiconductors. PQC must be tuned to severe processing power, bandwidth, and latency constraints, making space implementation problematic.

On Defense and Strategy

The Swiss Armed Forces' Head of Space Command, Colonel Ludovic Monnerat, questioned the strategic importance of orbital assets for national security. He said secure command-and-control and quantum-resilient identities are essential for protecting sovereign assets in contentious situations. Benjamin Guyot, CEO of SpaceTalk, called secure satellite communication the “critical infrastructure” for space traffic coordination.

Emile de Rijk, CEO of SWISSto12, addressed industrial implications by saying satellite security must start with hardware and payload security. According to Mohammed Aboul-Magd of SandboxAQ, PQC must be built today to secure data that will still be in transit when quantum computers mature because space systems may last decades.

Increasing Commercial Space Economy

Group considered new commercial industries. Axiom Space President Jonathan Cirtain discussed human and commercial space station security. The space economy and in-orbit services need post-quantum protection, he said.

Strangely, the subject went to the “circular space economy.” Luc Piguet, CEO of ClearSpace, says active debris removal and in-orbit servicing will make the difference between a functioning satellite and a danger software-defined. Therefore, only authorized and secure systems can ensure safety in a crowded orbit. According to ID Quantique CEO Grégoire Ribordy, QKD and PQC should be used together in this search.

WISEKey Roadmap and Subsidiary Ecosystem

WISeKey's specialty subsidiaries are leading this transformation as a global cybersecurity and IoT provider. The company reported numerous major achievements:

Late-2025, WiseSat.Space started satellite PQC PoC testing. Fully functional WISeSat PQC will launch in Q2 2026. SEALSQ Corp. makes post-quantum technology and semiconductors. For secure IoT applications, WISeKey SA and WISeSat AG provide RoT and space-based communication protocols. WISeKey creator and CEO Carlos Moreira concluded the event that space is becoming the “backbone of our digital and geopolitical infrastructure”. In the quantum age, hardware-anchored trust and cryptographic agility are essential for sovereignty and mission success.

Predicting