Walsingham Associate Inc logo - TSCM bug sweeps
Go to Walsingham homepage Email Walsingham Associate Inc
Home | About Us | The Risks | Our Procedures | Contact Us

Serving the San Francisco Bay Area, Silicon Valley, Northern California and the Western United States

  What's a "bug"?
Phone taps
Found a bug?
Where to look
Home inspections
Off-site meetings
Who's Walsingham?



You should only contact us from a telephone outside of the potentially compromised location! DO NOT call from your office or home; use your cell telephone only from a discreet location.



Which location is most vulnerable for corporate secrets? THE EXECUTIVE RESIDENCE.

In our experience, this is the corporate soft spot. FM cordless phones, analog phone-digital telephone lines, answering machines, baby monitors etc. combine to cause the problem.

We recommend a survey of an executive residence in conjunction with the corporate office “post sweep”. There is great value in an inspection that highlights potential problems. For example, if an easily intercepted cordless phone is being used, the recommendation that it be replaced with a spread spectrum model that cannot easily be monitored.

One of our corporate clients had an innovative solution to the analog cordless phone problem. They purchased a dozen secure, digital cordless, spread spectrum telephones which were switched with the executives non-secure analog cordless telephones.

Two technicians can complete this sweep in about four hours. The first part of the sweep is spent looking for radio and video signals. Then, they open and examine the telephones and trace the wiring. The physical inspection is concentrated in the living area. When the inspection is completed the homeowner or his representative is debriefed. Our discussion with the homeowner includes information on a broad range of security issues as appropriate. Common items include physical security, shredders, analog cell phones, and safe storage of handguns and how to identify possible surveillance of the residence.

During an inspection of home answering machines we explain how they may be used to eavesdrop on conversations. In one recent inspection we demonstrated how the answering machine would intercept conversations. An unknown person had asked the housecleaner about the family schedules. This was followed by a break-in where nothing was taken. Following the break-in conversations from the residence were being repeated at work. During our demonstration the homeowner recognized the letters “RM” on the display indicating that the machine was in the remote monitor mode. The homeowner said, "I have seen that RM display before!"

In a different residential survey we found an answering machine problem in a fax machine. The all-purpose device was being used to monitor our client's home office.

Telephone lines are traced and tested from the instruments to the telephone interface block generally located at the exterior of the residence. In one survey this unsecured interface block was inspected and a radio transmitter was found. In several others we have found “cross-over” wiring, which facilitated an on-going line transmission of signals outside the residence.

A more in-depth home inspection is performed if specific issues are being investigated.

Copyright 2006 [Walsingham Associate Inc.] All rights reserved
We are licensed California Private Investigators: #11308 #11618 #24774