In an era of exploding satellite constellations, orbital data centers, and the nascent space economy, secure computing has emerged as a critical yet often overlooked frontier. On April 30, 2026, SpaceNews reported that Singapore-based startup SpaceComputer is set to conduct the first on-orbit test of its groundbreaking hardware and software architecture later this year. Dubbed Space Fabric, this system promises physically isolated, cryptographically trusted computing nodes that link ground stations with satellites while enabling inter-satellite resource sharing – laying the foundation for what co-founder Daniel Bar calls an open, interoperable “space internet.”
The October 2026 launch – aboard an as-yet-unidentified satellite – marks a pivotal milestone for SpaceComputer, founded just two years earlier in 2024. It will validate key innovations in orbital trusted execution environments (TEEs), including on-orbit cryptographic key generation and dual secure-element attestation, all designed to eliminate trust in terrestrial operators or vendors.
SpaceComputer was established in 2024 by Daniel Bar, a materials engineer turned blockchain entrepreneur and investor, and Filip Rezabek, a research associate and PhD student at the Technical University of Munich specializing in network security, cryptography, and blockchain-based trust systems. The duo’s complementary expertise – Bar’s business and materials background paired with Rezabek’s deep technical focus – has driven the company’s mission: to build a distributed satellite network for ultra-secure, confidential computation that is physically tamper-resistant and verifiable from orbit.
Their vision draws a direct parallel to the early internet: space, as the “next digital frontier,” should evolve as an open, protocol-oriented ecosystem reliant on public standards, cryptographic security, and strong data integrity assurances rather than proprietary silos.
The company’s website frames it as “Satellite-based distributed network for secure, confidential smart contracts and physically-verifiable blockchain computation in orbit.” It operates a two-tier architecture: a capacity-constrained but ultra-secure orbital Layer 1 (Celestial) for root-of-trust functions, bridged to high-performance Earth-based Layer 2s (Uncelestial) for scalability.
At the core of SpaceComputer’s offering is Space Fabric, a hardware-software architecture featuring secure, physically isolated computing elements. Unlike terrestrial TEEs (such as Intel SGX or ARM TrustZone deployments), which remain vulnerable to physical access or supply-chain compromises, Space Fabric leverages a satellite’s post-launch inaccessibility as an inherent tamper barrier.
Trusted Execution Environments (TEEs) form the foundation of Space Fabric’s secure computing model. In essence, a TEE is a protected processing environment – typically implemented through specialized hardware extensions and firmware – that creates an isolated execution space where sensitive code and data remain confidential and integral, shielded even from the host operating system, hypervisor, or privileged software. Traditional terrestrial TEEs, such as Intel SGX or ARM TrustZone, rely on CPU-level isolation features to run applications in secure enclaves on Earth-based hardware. These systems have proven effective for cloud confidential computing, yet they face inherent limitations: physical access to the device, sophisticated side-channel attacks, firmware-level exploits, or supply-chain tampering can still compromise the root of trust. Space Fabric’s orbital TEEs fundamentally address these weaknesses by relocating the trusted computing base into space. Once the satellite reaches orbit, the hardware becomes physically unreachable to any adversary on Earth, creating a natural tamper-evidence layer that no ground-based system can replicate. All cryptographic material is generated on-orbit within hardware secure elements, attestation occurs through satellite-specific protocols tied to the vehicle’s verifiable location and motion, and dual-vendor verification eliminates single points of failure. The result is a space-native TEE that delivers stronger confidentiality, integrity, and provenance guarantees for orbital workloads, making it ideal for applications where data sovereignty, resistance to nation-state threats, and verifiable execution are non-negotiable.
Key technical innovations, detailed in the March 2026 arXiv paper “Space Fabric: A Satellite-Enhanced Trusted Execution Architecture” (co-authored by Rezabek, advisor Dahlia Malkhi, and founding engineer Amir Yahalom), are structured as follows:
- On-orbit key genesis: All cryptographic keys are generated internally after launch within secure elements (SEs), eliminating any pre-launch “secret window” on Earth.
- Dual-SE cross-verification: Two independent secure elements – the mature, certified NXP SE050 and the fully auditable, open-source Tropic Square TROPIC01 – co-sign attestation evidence. This removes single-vendor trust and requires an adversary to compromise both simultaneously.
- Satellite Execution Attestation Protocol (SEAP): Provides “Proof of ET” (execution tied to a specific orbiting platform) via a Byzantine-tolerant quorum of ground stations, binding computation to the satellite’s physical location.
- Implementation: Built on USB Armory Mk II with ARM TrustZone, OP-TEE, and Veraison-based attestation verification. It has been evaluated against software and hardware attacks.
During the October test, Space Fabric PCBs will integrate into a hosted payload to demonstrate stable on-orbit key generation, mutual authentication between the dual SEs, and resilience to radiation and extreme temperatures – core challenges for space-grade hardware.
Use cases span secure computing and communications, provenance verification for geospatial data (critical for Earth observation and preventing tampering), confidential smart contracts, key management services (KMS), zero-knowledge proofs, and verifiable randomness via the company’s cTRNG (cosmic true random number generator) toolkit.
Complementing Space Fabric is Orbitport, an application programming interface (API) acting as a secure, trust-minimized gateway between satellites/payloads and terrestrial compute. It streamlines interactions with ground station providers and enables Earth-based applications to access orbital services – such as randomness beacons or confidential computation – without heavy reliance on operators. Early developer tools already support Ethereum-compatible environments and integrations like EigenDA for data availability.
In 2026, Orbitport will evolve to run fully within TEEs, introduce private beacons, and support testnet-to-production rollouts for on-chain randomness consumption.
SpaceComputer has raised $10 million in pre-seed and seed funding. The seed round was co-led by crypto-native investors Maven11 and Lattice, with participation from Superscrypt, Ethereal, Arbitrum Foundation, Nascent, Hash3, and others – including notable angels like Marc Weinstein, Jason Yanowitz, Ameen Soleimani, and Will Price. The pre-seed was led by Primitive Ventures with support from Nascent and others. Funds are allocated to satellite design/build/launches, custom space-grade hardware, consensus protocol development (informed by Malkhi’s research), and new security services.
Advisors include University of California, Santa Barbara computer science professor Dahlia Malkhi (a leading expert in consensus and cryptography) and Will Heltsley, former SpaceX vice president of propulsion. The growing team includes founding engineer Amir Yahalom and operations/marketing leads. Partnerships span Technical University of Munich, UC Santa Barbara, and EigenDA.
Milestones already achieved include multiple test satellite launches via SpaceX Falcon 9, deployment of Orbitport and cTRNG, and early developer onboarding. The company’s site currently reports three active satellites, ongoing random beacon operations, and significant data downloads.
The test arrives amid surging interest in orbital infrastructure. SpaceX’s valuation has skyrocketed, StarCloud has launched Nvidia H100 modules for space data centers, and projections forecast satellite numbers exploding from ~12,500 in 2026 to potentially 500,000 by 2035. Applications range from Starlink-style communications (user base doubling yearly) to AI compute, Earth imaging, and supply-chain monitoring.
Yet, as Bar and Rezabek emphasize, most efforts overlook the “space internet” – the interoperable networking layer essential for secure, decentralized operations. Space Fabric addresses this by providing a space-native root of trust: physically isolated, cryptographically attested, and independent of Earth-based vulnerabilities like jurisdiction, physical intrusion, or vendor lock-in. It positions SpaceComputer as the “https for space compute,” enabling the tokenization and settlement of space-native services in a borderless orbital economy.
Radiation hardening, thermal extremes, communication latency, and consensus in a dynamic orbital environment remain formidable. SpaceComputer’s roadmap for 2026 includes finalizing Space Fabric devkits, private testbed access to SpaceTEE units, Uncelestial L2 devnet integration, and expanded services (confidential compute, ZK proofs, immutable logging). Broader testing and production readiness follow the October commissioning.
SpaceComputer’s on-orbit test of Space Fabric is more than a hardware validation – it is a foundational step toward realizing a secure, open space internet. By merging satellite physics with cutting-edge cryptography and blockchain principles, the startup aims to deliver tamper-resistant compute that benefits both orbital infrastructure and Earth-based applications. As the space economy accelerates, initiatives like this could ensure that humanity’s expansion beyond Earth is built on verifiable trust rather than fragile assumptions.
With $10 million in backing, a world-class advisory board, and rapid progress from research to flight hardware, SpaceComputer is poised to play a central role in the next chapter of decentralized technology – one written not just on Earth, but among the stars. Developers, researchers, and space enthusiasts can follow updates via the company’s blog, Telegram community, and documentation at spacecomputer.io.
The October demonstration will offer the first real-world glimpse of whether this ambitious architecture can deliver on its promise of orbital-rooted security. If successful, it could accelerate the convergence of space, cryptography, and computing into a resilient, global infrastructure for the decades ahead.
