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The Tallest Tara
@tarajean
We build on a growing space ecosystem, where we can utilize global connectivity from Iridium’s Low Earth Orbit (LEO) satellite constellation, and an increasing number of providers enabling on-orbit compute devices (aka boxes or nodes). Today’s reality: bandwidth is limited, latency is high. But within 10 years, these constraints will mostly disappear.
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The Tallest Tara
@tarajean
There are several advantages to the security of space. Once launched securely into orbit, a compute node becomes: → Tamper-proof: physically unreachable → Delete-proof: erased data is gone forever → Jamming-resistant: secure ground zones prevent interference → Geolocation-attested: predictable orbits provide Sybil resistance
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The Tallest Tara
@tarajean
Satellite-based software is not without vulnerabilities. As of now, the root of trust in the supply chain is less mature, ground station communication, and upgrading software are attack surfaces. Many of these are considered vulnerabilities since this is a nascent technology. With time, it will evolve.
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The Tallest Tara
@tarajean
We’re already exploring several use cases with partners and the community: → cTRNG (Cosmic True Random Number Generator) → Validator diversification → Proof-of-Location → Secure orbital co-processors → Immutable bulletin boards → Chain checkpointing to prevent long-range attacks The most valuable use cases will be the ones we haven’t imagined yet.
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The Tallest Tara
@tarajean
As outlined in our Blue Paper, our architectural design goal is to minimize the trusted compute base (TCB) in orbit. Less software on the satellite itself means smaller attack surface, easier verification, and fewer upgrades. Workloads run in sandboxed environments, with scalability anchored to services on Earth.
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The Tallest Tara
@tarajean
Our software runs on a two-tier architecture model: Celestial Layer 1: authoritative root of trust in orbit, optimized for limited and intermittent communication. Uncelestial Layer 2: multiple high-throughput Layer 2 chains providing services on Earth, anchored to L1
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The Tallest Tara
@tarajean
For the Layer 2, we're introducing a third variation, a hybrid of commit chains and state channels that combine state-channel speed + rollup security. The validators in the Layer 2s stake votes on finality, enabling near-instant confirmations on Earth while always deferring to Layer 1 for ultimate security.
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The Tallest Tara
@tarajean
We’re already collaborating with an open, evolving community. The Request for Proposal system is live on GitHub. We’re building in the open. Join us, experiment with workloads in orbit, and help shape systems that will still be running long after Earth’s infrastructure has failed with 𝕤𝕡𝕒𝕔𝕖𝕔𝕠𝕞𝕡𝕦𝕥𝕖𝕣. → Watch the full video here: https://www.youtube.com/watch?v=x4EgWxrxF4o → Read the full blog here: https://blog.spacecomputer.io/recap-building-the-orbital-root-of-trust-w-dahlia-malkhi/ → Join the Community: https://t.me/SpaceComputerOfficial
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