Pattern TE-E
Flow out of the zone: a diode in and out
Two diodes in opposite directions are not a bidirectional link, as long as they stay physically separate.
- Area
- TEMPEST/RÖS
- Environments
- 1
- Products used
- 10
How it is built
- Approval document per article numberThe two diodes are requested separately — a supplier statement says nothing about the unit.
- The direction sits in the opticsNo rule, no configuration, no setting that can be changed afterwards.
- One-way path
- Data path
- Path that does not exist
How it works
Backups and logs leave the zone through one diode. Updates enter through another. The two are physically separate devices with separate approvals.
Two diodes are not a bidirectional link
They stay two links as long as neither depends on the other. That independence is the property being protected, and it is lost quietly — usually when someone automates a retry that waits for something from the other side.
The restore is the hard direction
Getting data out is straightforward. Getting it back in crosses the boundary the wrong way and needs its own solution, its own approval and its own decision owner. Design it before the first backup runs, not after the first incident.
In the catalogue
Equipment from the catalogue
TEMPEST Level A · RÖS U1
Data Diode Secure 1 Gbit MM TEMPEST
- Data rate
- 1 Gbps
- Wavelength
- Multimode 850 nm
- Input, LC
- 1000 BaseSX
Product no 60-00-7303
Next step
Designing something that is not here?
Send us the constraints. We build from idea to certified end product, and most of what is in the catalogue started that way.
Verified credentials
All certifications- NATOCertified TEMPEST supplierSDIP-27 · Level A & B
- Swedish Armed ForcesM-numbered equipmentMain supplier, Total Defence
- Government of SwedenSupplier to Swedish authoritiesPolice · FMV · FOI
- ISO 9001 14001ISO certifiedQuality & environmentDownload certificate (JPG)
- SOFFDefence industry memberExport control frameworks
- Made in SwedenDesigned & built in StockholmSecure supply chain
