23 December 2002
Source: FOIA material received from the US Army Intelligence and Security Command, November 25, 2002. Excerpted from Dossier ZG000495W, Corps Communication Center, pages 24-27.

This describes TEMPEST deficiencies in a US Army crypto facility. More on TEMPEST:

http://www.eskimo.com/~joelm/tempest.htm


[3 pages.]

REGRADED UNCLASSIFIED
ON MAR 20 1998
BY CDR USAINSCOM FOIAP
AUTH PARAS 1-603 DoD5200 1R


                            CONFIDENTIAL


                        DEPARTMENT OF THE ARMY
                          STUTTGART STATION
                    66TH MILITARY INTELLIGENCE GROUP
                               APO 09154

             REPORT OF COUNTERINTELLIGENCE TECHNICAL SERVICES
                                   OF
                        34TH SIGNAL BATTALION
                         APO NEW YORK 09154

                                                      DEC 10 1970


AEUTMI-O-Q-I&S(CI)

Commanding Officer, 34th Signal Battalion, ATTN: S2, APO 09154
Commanding General, VII Corps, ATTN: AETSGB-CI, APO 09107
Commander-in-Chief, USAREUR and Seventh Army, ATTN: AP ASB-CI(GS),
APO 09403
Commanding Officer, 66th Military Intlligence Group, ATTN: ABUT I-GA-CI
APO 09108

                         Section I. INTRODUCTION

1. (U) A counterintelligence technical survey was conducted on 23
November 1970, on the Crypto Facility of the 34th Signal Battalion by
the following representatives of Stuttgart Station, 66th MI Group, APO
09154:

                        [Redacted] Special Agent
                        {Redacted] Special Agent

2. (U) The serviced area was considered by the requestor to be a 
secondary sensitive area as defined in AR 381-14(Clas). A description
contained in EXHIBIT I [exhibits not provided].

3. (U) An examination of the records regarding previous counterintel-
ligence technical services in the area revealed that there is no record
of a previous technical service.

                               Section II SCOPE

4. (C)(U) The scope of this technical service is outlined in EXHIBIT II.

                          Section III LIMITATIONS

5. (C)(U) The limitations of this services are outlined in EXHIBIT II.

6. (C)(U) Repeated or uncorrected findings: None.

7. (C)(U) a. The service did not locate or indicate the presence of
technical surveillance devices.

          b. The serviced area does not meet the criteria for a secondary
sensitive area as defined in AR 381-14 and is not considered secure for
the discussion of sensitive classified information until correctiive ac-
tion is taken on the following technical security hazards:

             (1) Finding: The walls of the following area are
passing audio and audio vibrations from the inspected area. (AR 381-14
(Clas), para 10.b.(1).

                  (a) Room #1 Adminstration Room, East, West and
                      North walls.

                  (b) Room #2 Storage Room, East and West walls.

                  (c) Room #3 Maintenance Shop, East, West and South
                      walls.

                  Recommendation: Adequate sound proofing to provide
a minimum sound attenuation of 45 Noise Reduction Coefficient and Sound
Transmission Class in accordance with American Society for Testing
Materials (ASTM) test method C423, should be installed.

              (2) Finding: The window of the west wall of Room #1 is
passing audio and audio vibrations from the inspected area. (AR 381-14
(Clas) para 10.b.(1).

                  Recommendation: This window should be permanently
sealed with a sound proofing material, such as concrete or covered with
sound proofing drapes.

              (3) Finding: The entrance door of Room #1 is passing
audio and audio vibrations from the inspected area. (AR 381-14 (Clas),
para 10.b.(1).

                  Recommenation: The interior of the door should be
covered with a sound proofing material, such as acoustical tile, or
sound proofing drapes.

              (4) Finding: The radiator and pipes in Room #3 are
passing audio and audio vibrations from the inspected area. (AR 381-14
(Clas) 10.b(2).

                  Recommendation: Ther adiator should be enclosed in
a louvered cabinet constructed of sound absorbant material. The pipes
should be covered with a sound absorbant material and secured at the
inner wall openings to minimize acoustical leakage.

                          Section V COMMENTS

8. (U) The unit commander is reminded that USAREUR Regulation 380-85,
Paragraph 12e, requires that this report be indorsed through command
channels to CINCUSAREUR, ATTN: AEAGB-CI(GS), with a list of cor-
rective action and/or commanders comments for each recommendation made
on this report.

                         Section VI EXIT BRIEFING

9. (C)(U) All findings, recommendations, and limitations of the service
areas were discussed during an exit briefing on 23 November 1970, for
the following unit representatives:

                        Grisham, James, E.O. S2
                        Comsec Officer

                                      [Signature]
                                      DON J. DRISSEL
                                      GS-11
                                      Operations Officer