Past QKD missions/experiments
(space + major terrestrial testbeds and national projects)
1) DARPA Quantum Network — United States (operational from 2003)
First operational metropolitan QKD network (testbed for QKD over fiber, multiple nodes).
Main partners: DARPA (sponsor), BBN Technologies (build & ops), Harvard University, Boston University Photonics Center.
2) SOCRATES / SOTA (Small Optical TrAnsponder) — Japan (launched 2014; quantum experiments 2016–2017)
Microsatellite lasercom terminal used to demonstrate single-photon / quantum-limited optical downlinks from LEO. First small quantum transmitter demonstrations from orbit.
Main partners: NICT (National Institute of Information and Communications Technology, Japan) — SOCRATES bus carried SOTA.
3) Micius / QUESS — China (launch 16 Aug 2016)
First demonstration of long-range space-to-ground QKD, entanglement distribution and teleportation from orbit; enabled intercontinental experiments (China ↔ Austria).
Main partners: Chinese Academy of Sciences (lead, USTC); international ground partners included the Austrian Academy of Sciences (Graz) for intercontinental links.
4) Tiangong-2 compact QKD payload experiments — China (demonstrations reported 2017; public summaries 2018–2022)
A compact (miniaturised) space-to-ground QKD terminal was operated from the Tiangong-2 space lab to multiple ground stations — demonstrated shorter, lower-mass QKD payloads suitable for constellations.
Main partners: CAS / USTC teams and several Chinese ground stations; results reported in Chin. Phys. Lett. & Optica summaries.
5) ArQit / ESA QKDSat contract / UK-EU work (contract awarded 2018; trials following years)
ESA awarded a contract to ArQit (UK) to develop European quantum encryption satellite concepts — part of early European push for space QKD capability and industry trials.
Main partners: ArQit Ltd (UK) and ESA (contracting Directorate of Telecommunication & Integrated Applications); later commercial partners (e.g., BT) for trials.
6) SpooQy-1 / SPEQS family — Singapore (SpooQy-1 launched 2019; development earlier)
Nanosatellite demonstration of a miniaturised entangled-photon source (SPEQS/SpooQy series) to show entanglement production in orbit for future QKD.
Main partners: Centre for Quantum Technologies (CQT), National University of Singapore, smallsat collaborators.
7) India — ISRO free-space QKD demos (reported 2021)
Ground / free-space QKD demonstrations (e.g., ~300 m free-space links) reported by ISRO — experimental precursors toward potential satellite QKD capability.
Main partners: ISRO (Indian Space Research Organisation); academic/research collaborators reported in national press.
8) Chinese small QKD microsatellites / Jinan-1-style missions — (several launches ~2021–2023 era)
Following Micius, Chinese teams (USTC / CAS institutes) developed smaller QKD microsatellites to test miniaturised quantum payloads and international experiments (some cooperation reported with Stellenbosch University, South Africa).
Main partners: USTC, Jinan Institute of Quantum Technology, Shanghai Institute of Technical Physics, Innovation Academy for Microsatellites (CAS), Stellenbosch (where cited).
9) Trieste–Rijeka–Ljubljana inter-European QKD network (field experiments published 2021–2022; publicized 2022)
First demonstration connecting three countries via fiber QKD (trusted node architecture) — used as an inter-European testbed and for a public demo during the G20 Digital Ministers’ meeting.
Main partners: Academic & national telecom partners (Italian, Slovenian, Croatian institutions) and industry suppliers (QKD vendors such as QTI for devices in demonstrations).
10) Q-net-Q — Germany (launched 2023)
National research project demonstrating the integration of Quantum Key Distribution (QKD) into real-world fiber networks and Internet exchange infrastructure to enable quantum-secure communications. Focuses on long-distance QKD testbeds and interoperability with existing telecom networks. It is part of Germany’s contribution to EuroQCI.
11) DemoQuanDT (Deutsche Telekom / Germany) — large carrier-grade QKD trial (major field tests 2024–2025; project run 2022–2025)
National German demonstration of an operator-grade QKD testbed (900+ km test stretch linking Berlin–Bonn), integrating QKD into carrier infrastructure to show operational viability.
Main partners: Deutsche Telekom (lead/operator), KEEQuant, Rohde & Schwarz Cybersecurity, TU/Hochschule Darmstadt and other German R&D partners; funded by BMBF (Germany).
12) Trieste/Lisbon / Lisbon metropolitan & submarine QKD trials (Lisbon trials publicized 2024)
Demonstrations of QKD over combined terrestrial + submarine fibre links in the Lisbon metro area (real-world videoconference with QKD-protected keys).
Main partners: QTI (Quantum Telecommunications Italia), Telsy (TIM Enterprise), MEO (Portugal operator) and others under EQO/EQUO project demos.
13) INT-UQKD (ESA / international) — operational QKD use-case demonstrations (2024)
ESA-coordinated initiative to demonstrate international QKD use cases combining space and fibre QKD and trusted-node hybrid services (connectivity between Luxembourg, Belgium, Singapore etc.).
Main partners: ESA (coordination), Starion Luxembourg, POST Luxembourg, University of Luxembourg (SnT), HITEC Luxembourg, evolutionQ (Canada), SpeQtral (Singapore).
14) QUBE (German CubeSat / “Cube 1”) — Germany (launched 16 Aug 2024)
German CubeSat demonstration of miniaturised quantum-communication and optical payloads aimed at showing CubeSat-scale QKD hardware for European constellations.
Main partners: DLR (German Aerospace Center), LMU Munich, Max-Planck Institute for the Science of Light, OHB GmbH, Zentrum für Telematik e.V. (and university labs).
15) Ongoing/regional national QKD efforts (South Korea, Italy, others — assorted trials 2014–2024)
Numerous national trials and operator testbeds have been run (commercialized QKD devices in SK Telecom/industry, Italy TIM/Telsy deployments and trials, academic trials across Europe) — these form the rest of the global activity and some include airborne or plane→ground demonstrations and submarine fiber trials.
Representative partners and items: SK Telecom (South Korea) commercialization and labs, TIM / Telsy / QTI (Italy/Europe), university partners across Europe, airborne QKD demos in Germany/Europe.
Future planned missions by companies/countries
NanoBob (France)
Additional partners: Institute for Quantum Optics and Quantum Information (IQOQI, Austria), Thales Alenia Space France, Grenoble University Space Center (CSUG / Univ. Grenoble Alpes).
SPEQTRAL-1 & SPEQTRE (Singapore & UK)
Additional partners/industry: SpeQtral (lead commercial developer), SES (MoU/partnership), Kongsberg NanoAvionics (satellite bus provider), Mbryonics (optical terminal supplier). Supported by Singapore OSTIn.
QEYSSat (Canada)
Additional partners / organisations: University of Waterloo / Institute for Quantum Computing (IQC), National Research Council Canada (NRC) and UK groups (Heriot-Watt / others collaborating on entangled photon transmitter).
Q4S (Boeing + HRL, 2026)
Additional detail: HRL Laboratories (payload partner; HRL has GM ties) working with Boeing on the space entanglement-swapping payload. (Clarifies HRL’s role as Boeing’s tech/payload partner.)
QUBE-II (Germany)
Additional organisations: German Aerospace Center (DLR), OHB System (industrial partner), FAU / Telematik-Zentrum (academic partners contributing quantum modules).
ROKS (UK)
Additional organisation / lead developer: Craft Prospect Ltd (developer of the ROKS payload) and the UK Quantum Communications Hub / UK research partners.
Eagle-1 (ESA, 2028)
Additional partners: SES (leading the Eagle-1 public-private consortium), a ~20-partner European consortium (ESA / EU funding & national participants).
Two Unnamed QKD Missions (Honeywell, Nokia, Colt — 2027 & 2028)
Confirmed commercial collaborators: Colt Technology Services, Honeywell, Nokia (announced joint trials / collaboration on space-based quantum-safe trials).
SAGA (ESA, 2029)
Additional contractor / industry: Thales Alenia Space (contracted by ESA for system definition / preliminary design); SAGA will tie into European SpaceQCI access nodes and EU/ESA programmes.
JAXA / NICT QKD (Japan, ~2030)
Additional industry partners: SKY Perfect JSAT (joining JAXA/NICT R&D), with Japanese industry / players (reports mention potential involvement from major Japanese companies in national programmes).
GEO-QKD / GEO-QKD (Spain)
Additional contractors: Hispasat (Spanish operator) and Thales Alenia Space (developing the GEO QKD prototype / hosted payload). The ESA/European Q-Design initiative also links LEO & GEO elements (SES + Hispasat ties).
CNSA / China (MOZI etc.)
China’s CNSA/Chinese research teams (e.g., the Micius / Quantum Science Satellite programme led by Chinese Academy of Sciences) — China has an active national programme (satellite MoZi / Micius) and plans for larger LEO→MEO→GEO architectures.
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