Murray Associates TSCM - Electronic surveillance detection and counterespionage consulting for business, government and at-risk individuals.

Technical Information Security Surveys (TSCM) Counterespionage Consulting Services
for business & government, since 1978.



New York area headquarters.

Services available worldwide.

The New York City Wiretap Scandal of 1955


How Wiretap is Worked

New York gets its lines crossed.

Life Magazine - March 7, 1955


TSCM History - The New York City Wiretap Scandal of 1955. Ann Corio acting surprised about being stripped of her privacy by wiretapping.

     New Yorkers learned last week that their little telephones sometimes have big ears. The police and phone company agents had raided a Manhattan apartment and found a tapping center equipped to eavesdrop on any of thousands of lines into six big exchanges. The raiders made no arrests, seized none of the listening equipment and made no report to New York District Attorney Frank S. Hogan.


     The incident might have been hushed up but for a civic group called New York City Anti-Crime Committee, which got wind of the raid and demanded an investigation by the state legislature. Hogan moved in and obtained indictments against two phone company employees and the occupant of the apartment. He sent for the equipment, but it had vanished.


     What the tappers motives were - whether for possible blackmail or to get business secrets - was not clear since their victims were a miscellany of citizens. Many New Yorkers wondered meanwhile whether their conversations have been shared in the manner shown in the pictures and sketches on this page. To follow the tapping procedure used, start with Miss Ann Corio (left) and follow the red arrows (not all are shown).

1. One of the phones tapped was in apartment of former stripper Ann Corio, who could think of no reason why tappers should be interested. To follow a taps progress go on with the drawing below.

TSCM History - Diagram showing how wiretapping phones is done at the connection block.

2. Tapping method believed used is shown in drawing. In the telephone exchange panels, terminal points of tapped phones were connected by feed lines (in red) to wires leading to listening post.

TSCM History - Telephone wiretapper Walter Asmann.
TSCM History - Telephone wiretapper Carl Ruh.

Telephone men Walter Asmann (left) and Carl Ruh (right), who worked in the exchange, are accused of tapping.

3. To connect telephone exchange building (foreground) on East 56th Street with listening post on fourth floor of East 55th Street apartment house (background) the tappers used spare wires in the phone company's underground cable system. But near the apartment, they ran wires from the cable up side of the building.

TSCM History - Telephone wiretapping diagram showing the path the eavesdropping tap took through the city.




TSCM, Debugging, Bug Sweeps, Electronic Countermeasures


Debugging offices and conference rooms also includes an information security survey, and personal counterespionage consulting.

Workplace Inspections

• Law offices

• Boardrooms

• Trading floors

• Executive suites

• Conference rooms

• Board meeting inspections

• Info-loss vulnerability surveys



Debugging sweeps on all types of vehicles, including: cars, boats and aircraft (limousines, planes, autos, yachts, automobiles, airplanes)

Vehicle Inspections

• Eavesdropping Detection

• GPS Tracking Detection

• Limousines

• Aircraft

• Yachts



Wirelesss LAN TSCM inspections locate illegal rogue access points, Wi-Fi bugs, transmission and legal compliance issues.


Wi-Fi Cyber Espionage

• Wi-Fi Security & Compliance Audits

• Whole building / floor security audits

• Compliance surveys (HIPAA, GLBA,

  Sarbanes-Oxley, PCI-DSS, FISMA,

  DoD 8100.2, ISO 27001, Basel II)



TSCM is only part of a Murray Associates debugging sweep. We also conduct an information security survey for you.

Intellectual Property Protection Information Security Audits

• Information security surveys

• Business espionage prevention

• Information security




Inspecting for spycams and video recorders in restrooms, shower and locker areas, and any place where there is an expectation of privacy.

Optical Surveillance Detection

• Spycams, Covert Video

• Privacy due diligence for hotels, country clubs, resorts, community pools, schools and high profile individuals.



Bug sweeps are essential to protecting personal privacy in: homes, residences, corporate apartments, hotel rooms and off-site meeting locations.

Residential Surveillance Detection

• Corporate apartments

• Executive homes & offices

• Off-site business meetings

• Hotel room & resort conference areas

TSCM History - Drawing of wiretap listening post run by Warren B. Shannon.
TSCM History - Wiretap eavesdropper, Warren B. Shannon, and his wife.

4. Apartment where equipment was found was rented by Warren B. Shannon, an electrician, shown with his wife. The equipment was housed in a small closet and covered by a Venetian blind, as depicted by artist. Monitor listened to conversations to see whether they were worth getting down on tape recorder.