Covert space-to-ground signalling
Signal without
a trace.
A small satellite delivers keys, commands and time stamps into a fenced ground zone. Outside the perimeter, nobody can tell a transmission ever happened — a guarantee that holds against any quantum measurement.
High-consequence keys, C2 directives & authenticated time stamps.
Per LEO pass by matching beam diffraction to a controlled perimeter.
Sub-THz carrier confines main-lobe energy inside the physical fence.
Holds against any joint quantum measurement allowed by physics.
The Square-Root Law,
unlocked by geometry.
In quantum information theory, the Square-Root Law (SRL) dictates that to keep an adversary’s quantum state $\rho_1$ statistically indistinguishable from background noise $\rho_0$ across $n$ channel uses, the covert bit budget is set by the ratio of signal collected by the legitimate receiver ($\eta_{\text{legit}}$) to signal collected by the adversary ($\eta_{\text{adv}}$).
In the worst-case model—where an adversary can collect right up to the receiver aperture—that ratio gives only ~5 bits per pass. When the customer already controls a site the size of the beam footprint (about 0.5 km from LEO at 290 GHz), any adversary outside the fence is forced into the deeply attenuated diffraction region, raising the covert bit budget to thousands or tens of thousands of bits per pass.
$\eta_{\text{legit}} / \eta_{\text{adv}} \approx 1.0$ →~5 bits / pass
$\eta_{\text{legit}} / \eta_{\text{adv}} > 2{,}800\times$ →14,200+ bits / pass
Without perimeter exclusion, an adversary can position a collector immediately adjacent to the receiver ($\eta_{\text{legit}} / \eta_{\text{adv}} \approx 0\text{ dB}$). Covert power must be throttled so low that only ~5 bits can be delivered per orbital pass.
At 290 GHz ($\lambda = 1\text{ mm}$), the main diffraction lobe from 500 km LEO measures ~0.5 km across. Controlling a 0.5 km site forces any adversary outside the fence ($r \ge 0.25\text{ km}$) into suppressed sidelobes (< -36.8 dB), multiplying the covert bit budget by over $2,800\times$.
Built for defense & sovereign
operators of controlled sites.
DATASAT is not a consumer broadband constellation. Our first systems are engineered for defense commands, intelligence agencies, and operators of critical remote infrastructure who already maintain physical security over a 0.5 km perimeter—and require zero-signature space-to-ground signalling.
Covert Command & Tasking into Remote Sites
Deliver high-priority execution orders, posture transitions, or target coordinates to remote defense installations without tipping off adversary SIGINT satellites or perimeter reconnaissance sensors that the site has been tasked.
Out-of-Band Key Delivery & Rotation
Continuously refresh symmetric one-time pads and Post-Quantum Cryptography (PQC) root keys into air-gapped sovereign facilities. Even an adversary with an ideal quantum memory outside the fence cannot tell a key refresh occurred.
Authenticated Time Stamps & Watchdog Sync
Maintain cryptographic clock synchronization, dead-man switch keep-alives, and ledger time-stamping across distributed defense nodes during theatre-wide GPS/GNSS jamming or spoofed electromagnetic environments.
Two product lines.
One physical-layer security foundation.
Covert Satellite-to-Ground Signalling
Our flagship LEO payload and compact ground collector turn existing 0.5 km fenced defense and government perimeters into certified covert downlink zones. Delivers thousands to tens of thousands of undetectable bits per pass for keys, commands, and precision time stamps.
- ■ 290 GHz Carrier: All-weather tactical pass availability through controlled sub-THz window with ~0.5 km LEO spot size.
- ■ Certified Covertness Ledger: Real-time link telemetry bounds adversary quantum relative entropy $D(\rho_1\|\rho_0) \le 2\epsilon^2$ on every pass.
- ■ Drop-In Ground Collector: Rapidly deployable, non-emitting ground terminal inside existing fenced facilities.
Quantum-Assisted Location Attestation
Building on our precision orbital pointing and quantum measurement bounds, DATASAT’s second product line introduces an optical payload for provable, unforgeable location attestation and spacetime coordinate verification.
- ■ Micrometer-Scale Optical Diffraction: Ultra-narrow laser footprints confined to single buildings, mobile platforms, or naval decks.
- ■ Unforgeable Position Verification: Combines relativistic time-of-flight bounds with quantum state non-cloning to prove an asset is physically inside an authorized geographic zone.
- ■ Sovereign Hardware Attestation: Cryptographically binds hardware execution to verified physical coordinates.
Request a technical briefing.
We conduct technical link-budget briefings and site-perimeter feasibility assessments for defense operators, government agencies, and strategic aerospace partners.
Site-specific 290 GHz diffraction footprint modeling, atmospheric attenuation profile, and certified covert bit-budget calculation for your perimeter geometry.