Data Diodes & Air-Gap Security
Cross-domain security without the government price tag
The cross-domain market was built for government buyers—integration projects measured in months, pricing measured in six figures, and operators left dependent on someone else's team. We think the organizations that actually run critical infrastructure deserve the same protection without the overhead. Hardware-enforced transfer you deploy yourself, in hours.
Products
Three layers, one architecture
Expanse enforces the boundary in fiber. ENS bridges protocols across it. Lattice runs the operation.
Expanse → ENS → Lattice
Capabilities
Built for purpose. Designed for speed.
Security that holds up in production, not just on paper.
Hardware Enforcement
Physical SFP fiber links ensure true one-way data transfer.
Lattice Console
File transfer, provenance, human review, and ENS orchestration.
Expanse Network Stack
TCP bridging, file transfer, and composable pipelines across the diode.
Zero Trust Architecture
Physically enforced policies regardless of software vulnerabilities.
Protocol Agnostic
Transfer files, streams, and database replications with integrity.
Mission-Critical Ready
High-availability configurations for environments where downtime isn't an option.
Who it's for
Organizations
Enterprise scale
Defense, critical infrastructure, and regulated finance — environments where a boundary failure has real consequences.
At home
Home-lab ready
Same stack enterprises deploy — without a procurement cycle. For homelabs, personal custody, and weekend bench projects on your own network.
Proxmox → cold storage
ens-file-reader --path /var/lib/vz/dump | ens-pitcher --udp-target-address 192.168.2.50- Homelab & self-hostingSeparate a trusted LAN from everything else — move backups, logs, or files one-way without opening a return path.
- Personal crypto & keysAir-gap signing, cold storage, and hardware boundaries for assets you custody yourself — not just exchanges.
- Developers & tinkerersComposable ENS tools and diode hardware you can actually buy and wire up on a bench or in a closet rack.
About
Experience you can trust
Domain Systems was founded in Maryland by U.S. intelligence community veterans, including former NSA offensive cyber operators, DIA signals specialists, and military network defenders, with decades of experience on both sides of the world's most secure networks.
Years on attack and defense inside the intelligence community left our founders with one conclusion: meaningful security must be enforced in hardware. Domain Systems exists to extend that standard to the utilities, factories, and defense suppliers that keep the country running, not only the agencies where we started.
Intelligence Community Roots
Founded by veterans who served in NSA offensive cyber operations, Defense Intelligence Agency signals collection, and related national security missions.
Decades inside the world's most secure networks, on both attack and defense, shaped how we think about cross-domain security.
Military-Grade Expertise
Rigorous discipline and validation methodologies from securing critical military networks.
Every component is thoroughly tested. We've brought defense-grade engineering principles into every Domain Systems product.
Cross-Domain Innovation
Large-scale CDS deployments handling petabytes of data for intelligence community customers.
Architectural patterns refined during government projects now serve as the foundation for our commercial products.
Operational Perspective
Field experience in network operations where usability and security must coexist.
Security products fail when they create friction. We design solutions that succeed in real-world environments.
Our Mission
Democratizing cross-domain security
While working with large federal budgets, our founders saw firsthand how prohibitive costs kept cross-domain solutions out of reach for most organizations. Domain Systems was created to change that.
We pair secure engineering with direct sales and support, so organizations of all sizes can adopt cross-domain protections without traditional vendor pricing.
Rapid Deployment
Field-ready appliances designed for deployment in hours, not months.
Cost Efficiency
Modular hardware and transparent pricing that scales with your needs.
Proven Security
Architected by experts who built and operated defense networks.
Full Audit Trail
Lattice logs every transfer for compliance and forensics.
Ready to secure your network boundaries?
Contact our team to discuss cross-domain security for your critical infrastructure.