Counter-surveillance hardening.

Opposite directions. A sweep is detective — it inspects a space and finds devices that are already there, at a single point in time. This is preventive — it engineers the space so surveillance can't function: signals can't get out, sound can't be captured, emanations can't be read, and the wrong device can't get in. A sweep asks 'are we bugged right now?'; hardening asks 'can we build a room where being bugged doesn't work?' The two complete each other — and every hardening build ends with a sweep to prove it.

Rarely, and never as the default. Most engagements harden a room you already use — Level 1: acoustic masking, RF denial, device protocol, and targeted isolation applied to an existing boardroom. Purpose-built secure rooms (Levels 2–3) are for organizations whose threat model or accreditation requirements demand them — sovereign, defence, and government spaces. We scope to the room and the threat, not to a construction quota.

TEMPEST refers to protection against compromising emanations — the faint electromagnetic signals that screens, cables, and equipment leak, which a capable adversary can reconstruct from outside the room. Whether you need it depends on your threat model: a corporate board hardening against a competitor usually doesn't; a government or defence space facing a state-level adversary does. Our assessment tells you honestly which layers your risk actually justifies, rather than selling the maximum to everyone.

It's designed not to. Denial is engineered as controlled, defined-area suppression contained to the secure space — the point is that devices inside the room can't reach out, without turning the floor around it into a dead zone. Where regulation constrains active denial, containment-first design (shielding and isolation) achieves the same outcome passively. We scope this to your building, your tenancy, and the applicable rules.

For corporate secure rooms, verification is our independent post-build TSCM sweep against the design's target level — documented, repeatable, and yours to re-run. For government and defence spaces requiring formal accreditation, we design to the applicable standard and support the accrediting authority's process; the accreditation itself is issued by that authority, not by us. Either way, the room is proven, not asserted.

It's the Harden step in a three-part lifecycle: Detect (a TSCM sweep), Harden (this service), Protect (the GT series holding the line between visits). For whole-building programs, it merges upstream with Secure Data Center Design — a secure room and a sovereign facility share a threat model and are engineered as one. And the hardware that does the denying and masking is the same equipment our sweep teams field, so the toolchain is consistent end to end.