WISeSat — Post-Quantum Secure LEO IoT Satellite Constellation
SEALSQ / WISeSat
WISeSat (WISeKey/SEALSQ) is a 21-satellite (growing to 100) LEO LoRa IoT constellation at 450–600 km SSO: store-and-forward LoRa at 300 bps/80 B, post-quantum cryptography (ML-KEM/ML-DSA), 10+ daily pass windows, built on FOSSA Systems PocketQube/3U platforms.
Key figurescomparable across the catalogue
- Data rate
- 0 Mbps
Normalised to common units so this product can be compared with others in its category. The supplier's own wording is below.
As published by the supplier
- Satellites deployed
- 21 (as of mid-2026); target 100-satellite constellation
- Orbit
- LEO, 450–600 km, near-polar SSO (~97.4° inclination)
- Protocol
- LoRa (LPWAN) — store-and-forward
- Frequencies
- 915 MHz / 868 MHz (UHF ISM); ~435–438 MHz (licensed UHF)
- Data rate per packet
- ~300 bps
- Max packet size
- 80 bytes
- Daily passes (21-sat)
- >10 per device per day
- Latency (current)
- ~10 hours (store-and-forward); target near-real-time at 80–100 sats
- Security
- Post-quantum cryptography: ML-KEM (Kyber) + ML-DSA (Dilithium); all messages encrypted
- Satellite platform
- FOSSA Systems PocketQube / 3U CubeSat
- Endpoint chip
- SEALSQ VaultIC408 (EAL5+, FIPS 140-3 L3) / QS7001 Quantum Shield RISC-V
- Service model
- SataaS — satellite, launch, ground stations, IoT node provisioning
- Recent launches
- SpaceX Falcon 9: Jan 2025, Jun 2025 (QKD demo), Dec 2025
About
WISeSat.Space is WISeKey International’s LEO satellite IoT connectivity service, operated in commercial partnership with SEALSQ Corp (NASDAQ: LAES) — WISeKey’s semiconductor subsidiary — for post-quantum secure communications. The constellation uses FOSSA Systems’ PocketQube and 3U CubeSat satellite platforms in near-polar sun-synchronous orbits at 450–600 km altitude, employing LoRa (Long Range) LPWAN radio protocol at UHF frequencies (915/868 MHz ISM; ~435 MHz licensed band). Each satellite contact window provides store-and-forward data delivery of up to 80-byte packets at approximately 300 bps; with 21 satellites deployed (as of mid-2026), customer devices receive more than 10 daily pass windows. The target 100-satellite constellation will reduce average latency from the current store-and-forward regime toward near-real-time delivery. All messages are 100% encrypted using post-quantum cryptography algorithms CRYSTALS-Kyber (ML-KEM) and CRYSTALS-Dilithium (ML-DSA), implemented in SEALSQ’s QS7001 Quantum Shield RISC-V secure processor and VaultIC408 secure elements embedded in the IoT endpoints. A companion Quantum Key Distribution proof-of-concept satellite (WISeSat 2.1) launched in June 2025. Service is offered under a SataaS (Satellite-as-a-Service) model including satellite platform, launch, ground station services, and IoT node provisioning. Launch milestones include SpaceX Falcon 9 flights in January 2025, June 2025, and December 2025.
Documentation
No public datasheet yet — request the datasheet / ICD from the supplier.