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May 2026 · Technical Surveillance

What a board should expect from a technical surveillance sweep

Boards increasingly ask a simple question: can we be confident that our most sensitive conversations are private? A technical surveillance countermeasures inspection, often shortened to a sweep, is how that question is answered. It is worth understanding what a credible inspection involves, and what it does not.

What it is for

The purpose is assurance: confidence that boardrooms, executive offices, and the discussions held within them are not being compromised through electronic means. That assurance has value before a sensitive transaction, after an event of concern, or simply on a sensible periodic basis in environments where the stakes are high.

What a credible inspection involves

A proper inspection combines detailed physical examination with structured radio frequency analysis and targeted technical testing. It looks closely at the environments, fixtures, and equipment where a compromise is most likely to occur, and uses comparative analysis to separate the ordinary signals of modern life from anomalies that warrant attention.

The work is methodical and operator-led. Equipment matters, but it does not interpret itself. Findings have to be understood in context by an experienced practitioner, and supported by analysis that would withstand scrutiny.

What you should receive

At the conclusion of an engagement you should expect a structured report: what was examined, what was found, and proportionate recommendations that strengthen privacy without disrupting normal operations. A sweep that produces only reassurance, with no method and no record, has told you very little.

A device in the room is one risk among several. The most useful inspections sit within a broader understanding of how a compromise might occur in the first place, which is where behavioural insight begins to matter.