TSCM · Technical surveillance countermeasures
Line, PBX and network analysis
Eavesdropping is not always in the room; it can be on the line, in the PBX and on the network. We also sweep the path the conversation travels.
What is checked?
Fixed telephone lines and extra connection points, PBX and IP phone configurations, call forwarding and silent-monitoring settings, the inventory of network devices and unknown devices, unauthorised access points, router and switch configuration, and hardware monitors plugged into keyboards and USB ports are examined.
Relation to information security
This work does not replace your IT security team; it complements it for physical and line-side surveillance risk. We can work with your IT team on request.
TSCM · Technical surveillance countermeasures
What we do
Phone line analysis
Detecting extra connections and unusual load.
PBX and IP phones
Forwarding and monitoring settings.
Network device inventory
Unknown and unauthorised devices.
Wi-Fi and access points
Rogue and unauthorised points.
Hardware monitor check
Keyboard and USB ports.
TSCM · Technical surveillance countermeasures
How we work
Confidential initial call
We talk on a secure channel away from the space and devices you suspect. We listen to what, where and why you suspect, and define the scope.
Appointment and security
The sweep date is discussed only with the people who need to know and away from the space to be swept. No sensitive talk takes place in the space beforehand.
Physical inspection
The space and its items are inspected visually: sockets, ceiling, lighting, electronics, furniture and newly added objects.
Technical sweep
Devices are searched for with RF spectrum analysis, NLJD, thermal imaging, optical lens detection and line/network analysis.
Findings and evidence preservation
If a suspect device is found it is not moved; it is photographed and its position and technical measurements recorded. The next step is decided with you and your lawyer.
Report and recommendations
Method, equipment, findings, risks and corrective recommendations are delivered as a written report.
TSCM · Technical surveillance countermeasures
What you receive
- Line and network findings report
- Device inventory
- Security recommendations
FAQ
Frequently asked questions
Do we still need this if we have an IT team?
Yes; IT security and physical surveillance detection are different specialisms and complement each other.
TSCM · Technical surveillance countermeasures
Related pages
TSCM: technical bug detection
Measurement, not guesswork, tells you whether you are bugged.
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Office and meeting room bug sweep
Secure the room where your trade secrets are discussed, by measurement, before an important meeting.
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A sweep is a photograph of that day.
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Digital investigations
Traces now remain on screens as much as on streets.
Explore →Legal framework: Dedektif Go works only by lawful methods. We do not wiretap, read messages or email, install unauthorised tracking software, track location without permission or access official records by covert means. Findings are reported in a form usable as evidence. Read what we do and do not do.
Let's talk first. A confidential, free initial call.
Tell us your situation and we will define the lawful route together. Your details are not shared with third parties.