In February 2006 I asked the reputable firm Lorraine Electronics to recommend a team for a TSCM sweep of my house in Clapham South. They recommended
Nick Steadman, who forwarded details of his team as follows;
Background details for Electronic Countermeasures and Security Sweeps
- The three members of the sweep team have over 30 years combined experience in Electronics Countermeasures and Security.
- Our backgrounds include service for Her Majesty’s Government, UK Special Forces Communications and British Telecom.
- We use the latest Audiotel computer-aided scanning equipment to detect illicit radio transmissions and we back this up with a thorough physical search. Telephones are physically opened and inspected for any signs of tampering and additional circuitry. Telephone lines are checked for taps and transmitters. If required, discreet security seals can be applied to equipment and mains / telephone sockets. These seals enhance security and reduce time on follow-up sweeps.
- For your 7 room domestic project we would send a two man team and charge a rate of £875 for the day.
- Our findings can be presented in a Report (Charged at £75.00) which contains advice on improving and maintaining a secure environment for all types of sensitive information.
Electronic Countermeasures Sweep
Initial Report
45 Englewood Road
Clapham
LONDON
SW12
Wednesday 26 April 2006
CONTENTS
Part One - GENERAL CONSIDERATIONS
Part Two - TARGET ANALYSIS
Part Three - THE COUNTERMEASURES SWEEP
Part Four - RECOMMENDATIONS
Part One - GENERAL CONSIDERATIONS
Introduction
At the request of Mr T Szocik an electronic countermeasures sweep was carried out at 45 Englewood Road, Clapham, LONDON, SW12 on Wednesday 26 April 2006.
Whilst information can be stolen by other means, information-gathering through the use of electronic eavesdropping represents a real and significant threat. The purpose of this sweep was to satisfy Mr Szocik that the techniques used would significantly reduce the threat from eavesdropping devices, to assess vulnerability to this and other forms of attack, and to make recommendations where appropriate to protect him from risks of this nature.
Scope of the Report
Although this Report is concerned with electronic eavesdropping, observations and recommendations are made with regard to general security matters, where applicable.
Part Two - TARGET ANALYSIS
General Site Considerations
There are suitable hiding places in all areas for bugging devices, microphone cables and tape recorders. Many areas could allow concealment of radio transmitters with large battery packs for extended operation. There is, in all areas, sufficient furniture to permit quick concealment of a small, disposable radio transmitter. Some areas can be overlooked using high power optics.
The main threats are perceived to be from :
- Radio transmitters / baby alarms installed within rooms for relaying room conversation.
- Tape recorders concealed within rooms for recording room conversation.
- Use of cables to carry room conversation, whether by audio frequencies (wired microphone), or by means of a high frequency carrier, to a Listening Post either within the premises or in nearby buildings.
- Telephone tapping equipment placed on the line.
- Telephone tapping equipment placed between the line and the analogue extension.
- Audio modifications made to digital handsets.
- Interception of video information on computers / VDU screens.
Specific Considerations
45 Englewood Road is a three-storey Victorian terraced house, linked to its neighbours on both sides. There are voids in the loft and cellar areas where microphones could be easily inserted.
There is no alarm system or CCTV cameras protecting the premises.
Part Three - THE COUNTERMEASURES SWEEP
The following areas were checked :
Room No*
Type
Remarks
G01
Front Room
Full check
G02
Dining Room
Full Check
G03
Garden Room
Full Check
101
Rear Office
Full Check
102
Middle Bedroom
Full check
103
Front Bedroom
Full check
201
Attic Bedroom
Full check
*Room numbers allocated by Team.
Each area was subject to :
- Upper band radio frequency scan (10 MHz - 5 GHz)
- Low band radio frequency scan (12 KHz - 10 MHz)
- Low frequency mains carrier scan (25 KHz - 500 KHz)
Computer-aided scans were made, analysed and electronically examined for any anomalies, and then stored for future reference and comparison. No hostile transmissions were detected during the inspection.
Telephone sockets were opened and inspected carefully for any signs of modification.
The downstairs analogue telephone was checked for :
- Upper band radio frequency devices
- Lower band radio frequency devices
- Parallel taps
- Infinity taps
- Audio modifications
The instrument was tested with both the conversation monitor and Delta V radio frequency detector.
A Non-Linear Junction Detector (Broom) was used to check for concealed electronics, backed up by a thorough physical search.
In addition the front and rear gardens, loft spaces and cellar were all visually inspected.
The TV set in the front room was opened and the circuit board was checked for any extra components.
No radio bugs, hard-wired devices, audio modifications, telephone taps or illicit recording equipment were found during the counter-measures sweep.
Part Four - OBSERVATIONS AND RECOMMENDATIONS
One disadvantage of living in an old terraced property is the direct party wall link to neighbours. Furthermore chimney-breasts, cellar and loft spaces all have voids, which allow access to each other’s properties. The saving grace with these locations is that sensitive conversations are rarely held in them.
There is always a risk that a neighbour might use a device which detects conversations through walls. Unfortunately there is no defence against this form of attack other than to ensure that any sensitive conversations are held away from the house.
There may be some merit in installing an alarm system to deter potential attackers from entering the property. The addition of a CCTV camera at the front and rear of the house would complement this.
Contractors carrying out work on the premises should always be escorted.
The ADSL phone line is difficult to intercept due to the combination of speech and data on the same line. We would suggest, however, that a DECT instrument replaces the old analogue telephone in the front room.
Any computers in the house should have short screen saver delay times to prevent any sensitive information being displayed for long periods.
The wi-fi network unit should have access codes changed on a regular basis.