l 

NATIONAL. SECURITY AGENCY 

WASHINGTON 25, D. C. 

Serial: 000539-s 

SUBJECT: Report of.Communications Security Violations 

ID: Commander 

u. s. Air Force Security Service 

San Antonio, Texas 

8 Dec 54 

1. Attached is the quarterly (April through June 1951.i.) compilation of communications security violations reported to or noted by 

this Agenay which occurred in commu.nications'or those Air Force 

stations which'ha.ndle COMINT traffic. You have been notified of 

completed evaluations of possible compromises which are reported herein as violations. · 

2. This report is furnished primarily for guidance in improving 

the security of COMINT communications. Similar reports are forwarded 

to Chief, Army Security Agency, and Chief of Naval Operations. Upon 

request, additional copies of this report will be provided in sufficient quantity for dissemination to those activities under your command 

engaged in COMINT operations. 

3. Extracts from this quarterly summary may be classified. SECRET 

if the extracts are restricted to lists or violations which involve 

messages classified no higher than SECRET. For example, the list of 

violations committed by an activity which orisine.tes messages classified no higher than SECRET may be extracted and forwarded to that 

activity as SECRET material. The key list is SECRET in classification. 

4. This correspondence may be downgraded to SECRET upon rem.oval 

of Inclosure l. 

FOR THE DIRECTOR: 

GEO. E. Q,""'.~'""""' 

Colonel AGO 

Adjutant General 

Declassified and approved for release by NSA on 05-15-2014 pursuantto E .0. 1352a 

2 Incls: "" ~ 2 ~ '2--/' 1. Commm1cat1ons Securi~ Violat1onlOP SECftEf CON;°k~MBER - ""' -11' 

by Air Force Stations. COPY ~L .... ;OF _ 1.J1..ht 

2. Key List of Air Force Violations.P/\GE I _o / 'S£!!!s::.lAG_~· 

TOP SECRET 
cc: 

NSA Europe 

NSA United Kingdom 

NSA Far East 

NSA Alaska 

NSA Pacific 

AG 

c/s 

COMSEC (3) 

S/ASST c!!: 

COM 

PROD 

o6B 

411 

412 

413 

Serial: 000539-s 

8 Dec 54 

M/R: This is a compilation of communications security violations committed 

by Air Force COMINT stations during April, May, and June 1954. A similar 

report will be forwarded to Chief ASA and CNO. 

10 copi"es furnished US.AFSS. ·~ 

• e y, 2,60454/dmp , 

i'0P Silsma' CONTROL NUMBER 54-3396 .. :B 

COPY II OF 17 COPIES 

PAGE L OF l PAG'ES 

NSA Form 781-ClJ 6 Jul 51 'f()P SECRET 
REF ID:A56996 

.-.ep SECftET 9 

':POP SEJGHE':e 

COMMUNICATIONS SECURITY VIOLl\.TIONS BY AIR FORCEG STATIONS 

Dl'G TRIGRAPH 

0113ooz 

.020515z 

i308h5z 

232232Z 

262220Z 

280045z 

06082oz 

05003oz 

251201z 

251201Z 

24 April 

101215Z 

121720Z 

141530Z 

i8o6lt-oz 

222213Z 

2501i2oz 

2·r1715z 

051215z 

120305Z 

Incl 1 

NSA Form 781-Cll 6 Jul 51 

ADK 

AGN 

CEY 

DOB 

EBM 

lli'R 

AGN 

AIX 

COJ 

DFP 

DRY 

FBI 

GUL 

HNY 

IDG 

BAO 

BWD 

KJW NO. 

3d 

3a 

3c 

3c 

15 

3a 

·r 

3b 

8 

8 

11 

1 

3d 

3a. 

7 

3d 

3d 

3d 

3c 

3d 

USA-33 

APRIL 

MAY 

JUNE 

USA-311-C 

APRIL 

USA-38 

APRIL 

MAY 

REMARKS 

Broke on VEG.EU vice VEQEK 

Broke on FSPPZ vice FSPOC 

Broke on QVIBQ vice QBIVQ 

Broke on CRGCX vice CRGZX 

Omittc~ traffic type designator 

Broke on HPWQ;B vice APWQ;B 

Broke using trigraph AQE 

Broke on UWDRN vice UMDRN 

Used multiswitch setting 12345 

Used multiswitch setting 12345 

Operator failed to switch to cipher 

Broke on AM rotor arrangement 

Broke on NIYLV v~ce NIQLV 

Broke on WXGZN vice WXZGN 

Broke using trigraph FBT 

Broke on ZQROY vice ZGROY 

Broke on QQEYW vice QYEYW 

Broke on STZKZ vice STQKZ 

Broke on ALIYJ vice ILIYJ 

Broke on MLUNP vice TLUNP 

?'OJI sr.7r CONTROL ?·IUMBER 54-3396 A 

copy l OF ?..7 •• COPIES 

PAOF. . l 0.F 1:2 ?AGES 

T6P SECRET 

• 
"l'6F SEiSRE!l' 

VIOLATIONS (Cont'd) 

DTG TRI GRAPH KEY NO. REMARKS 

USA-:-JS ( flont' d) 

~ (Cont'd) 

190120Z DGG 3b Broke on FZKKV vice DZKKV 

301305Z !'BM Jd Broke on CYWCB vice CYFCB 

~ 

011700Z APA 16 Third rotor failed to step as scheduled 

Oll?OOZ AFF 16 Third rotor failed to step as scheduled 

021855Z ALQ 3d Broke on RBHUR vice RBHUU 

03203oz AQZ 3d Broke on VWQOK vice VWQOF 

092015Z Bx:r 16 Third rotor failed at counter reading 

626, second rotor failed at counter 

reading 1276 

091320Z BWQ 16 First and third rotors failed at 

counter reading 1821, second rotor 

tailed at counter reading 2471 

211920Z EWG 3d Broke on PHDJA vice PHDJZ 

USA-38B 

APRIL 

1501J.4Z CPO 3d Broke on VJDGY vice VJIGH 

260205Z EZJ 3d Broke on YMVCF vice YAVCF 

~ 

171854Z DED 3a Broke on KYXSU vice KYSXU 

192050Z DPQ .'.3c Broke on LBHTB vice LPHTB 

211825Z ECD 3a Broke on HNFHW vice HNHFW 

261710Z FHE 3b Broke on PTABZ vice PTAYX 

~ 

190220Z HTO 7 Broke using trigraph HTN 

222040Z IUW 3d Broke on KVYRD vice KNYRD 

'f6P ~9:? COil!'BOL UUM3ER 54-3396 A 

COPY OF 27 COPIES 

PAGE 2 OF 1?. PAGES 

NSA Form 781-ClB 6 Jul 51 TOP SE€RE'f 
. - . 

VIOLATIONS (Cont'd) 

DTG TRIGRAPH 

OlOlOOZ 

030115Z 

032315Z 

6 April 

070945Z 

0716ooz 

1J0005Z 

012335Z 

02034oz 

030735Z 

OJ0800Z 

OJ0816Z 

OJ0831Z 

121042Z 

121044Z 

121048Z 

121051Z 

200233Z 

200820Z 

201545Z 

201545Z 

141045Z 

20 June 

30 June 

AAD 

AVF 

BFO 

CNK 

CYE 

EKN 

AKP 

AMQ 

AFS 

AFH 

AHP 

DDN 

FDG 

DHX 

DJA 

NSA Form 781-ClJ 6 Jul 51 

KEY NO. 

10 

Jd 

Jd 

11 

Jd 

Jd 

3d 

3a 

Jd 

9a 

9a 

9a 

9a 

9a 

9a 

9a 

9a 

Jc 

7 

Jc 

Jd 

6 

13 

14 

USA-51 

APRIL 

3 

REMARKS 

Message indicator was derived using 

deciphering procedure 

Broke on UGSJU vice UUSJU 

Broke on EUXIQ vice EUXTQ 

Operat9r failed to switch to cipbe+ 

Broke on EXTHK vice EXTHR 

Broke on QYKEX vice OYKEX 

Broke on DVNYU vice DVNYW 

Broke on YVKGC vice YVGKC 

Broke on AONMJ vice AONAJ 

Broke on BB vice FF 

Broke on BB vice FF 

Broke on BB vice FF 

Broke on BB vice FF 

Broke on GG vice HH 

Broke on GG vice HH 

Broke on GG vice HH 

Broke on GG vice HH 

Broke on DXGPB vice DXCPB 

Broke using trigraph DFG 

Broke on USHLO vice USHLU 

Broke on IBIYE vice IBIHE 

Alignment in clear AGFOR 

Used incorrect codeword 

TOP SECRET codeword message 

enciphered in non-CQ."IINT system 

'!'O!' ~J'r CONTROL NUMBER .54-3396-A 

COPY OF 27 COPIES 

PAGE 3 OF 12 PAGES 

'F0P SE€RE'F 
VIOLATIONS (Cont'd) 

021240Z 

160120Z 

230200Z 

2jUlt-30Z 

2.30815Z 

230911z 

250100Z 

270210Z 

021900Z 

030930Z 

032.330Z 

050200Z 

070045Z 

0702l0Z 

070230Z 

ll0/t-30Z 

111700Z 

121500Z 

141915Z 

161800Z 

300245z 

020105Z 

13 May 

270540Z 

NSA Form 781-Cll 6 Jul 51 

TRI GRAPH 

AIW 

CTR 

DWT 

DWV 

mm .. DXG 

EFN 

DLX 

ARC 

AYL 

BKG 

BRJ 

CJW 

CKV 

CLR 

EHJ 

ERE 

FDY 

GBA 

GOH 

MOO 

AGS 

BTJ 

KEY NO. 

1 

Jd 

2 

2 

2 

2 

Jd 

Jd 

Jd 

Jd 

7 

Jd 

9b 

9b 

9b 

3d 

Jd 

Jd 

3d 

Jc 

.3d 

7 

14 

3d 

USA-52 

APRIL 

USA-53 

APRIL 

REMARKS 

Broke on ,M.i rotor arrangement 

Broke on ZFZZS vice ZFZZB 

Used key list assigned to USA-51 

Used key list assigned to USA-51 

Used kby list assigned to USA-51 

Used key lis~ assigned to US"A-~l 

Broke on JKIPI vice JKIPO 

Broke on IJIBN·vice lSIBN 

Broke on RGHBX vice QGHQX 

Broke on VKRTD vice VKRTY 

Broke using trigraph BGK 

Broke on LGCQJ vice LGCQT 

Broke on AA vice BB 

Broke on AA vice BB 

Broke on AA vice BB 

Broke on WASXZ vice WAS.XS 

Broke on WYFIT vice WYOIT 

Broke on GKJOF vice GPJOF 

Broke on RPEIW vice YPEIW 

Broke on YCRQG vice YCRQJ 

Broke on HTTCQ vice HTTCD 

Broke using trigraph AGE 

TS CW info enciphered in 

non-COMINT system 

Broke on SPTXO vice SPTXF 

'P9P eBe. CON.I'BOL NUMBER 54-3396- A 

copy 'r/.. I OF ~n coPIEs 

PAGE 4 OF 12 PAGES 

'FOP 4 SE€RE'f 
TOP S1!i9RB'i' 

VIOLATIONS (Cont'd) 

1603012 

.160915Z 

201307Z 

042.'.345Z 

05042oz 

081020Z 

240845Z 

110750Z 

041540Z 

0914012 

130615Z 

151040Z 

171025Z 

190835Z 

271530Z 

030245Z 

04003oz 

04051oz 

NSA Form 781-ClfJ 6 Jul 51 

TRI GRAPH 

CMC 

BXM 

BZB 

DUT 

HCL 

CHW 

CKJ 

EDV 

EWP 

FFJ 

FQZ 

GBQ 

AID 

ANQ 

ANS 

KEY NO. 

1 

1 

3d 

3d 

10 

3d 

.'.3b 

.'.3d 

3d 

9a 

7 

2 

3d 

Jd 

16 

Jc 

2 

2 

REMARKS 

USA-53 (Cont'd) 

JUNE 

USA-54 

APRIL 

USA-54A 

APRIL 

5 

Broke on PM rotor arrangement 

Broke on PM rotor arrangement 

Broke on VSFLG vice VSFXG 

Broke on YRKLI vice YKKLI 

Message indicator was derived 

using deciphering procedure 

Broke on MVJST vice WVJST 

Broke on SJCVS vice SJCUS 

Broke on ANPRP vice ANORP 

Broke on TJAMO vice TJAi.'iD 

Broke on BB vice AA 

Broke using trigraph EWF 

13 messages enciphered using 

key list assigned to USA-54A 

Broke on Wt-lJUX vice W'.VZUX 

Broke on HFCNB vice JFDNB 

Random. rotor failed to advance 

Broke on LDRWN vice LDRWM 

Used key list assigned to USA-59 

Used key list assigned to USA-59 

'feP BE~ CO?fl'ROL NUMBER 

COPY _a / OF 27 

PAGE 5 OF 12 

COPIES 

PAGES 

TOP SE€RET 
'i'ef SH0Flm 

VIOLATIONS (Cont'd) 

filQ TRIGRAPH 

040510Z 

.040510Z 

090615z 

110650Z 

150130Z 

260635Z 

270620Z 

020035Z 

02193oz 

061001-i.Z 

190335Z 

20091oz 

260650Z 

270115Z 

020530Z 

040100Z 

040920Z 

132350Z 

180356Z 

251855Z 

152110Z 

260011Z 

272135Z 

NSA Form 781-CIB 6 Jul 51 

ANY 

ANZ 

BJK 

BPT 

CEJ 

EFK 

EHD 

AEN 

AIG 

AXQ 

DIG<: 

DSM 

FCA 

FFG 

AHM 

BCG 

BFL 

DRM 

EPB 

GAT 

BQR 

DEY 

DOJ 

KEY NO. 

2 

2 

3b 

3d 

3b 

3a 

3d 

3d 

3b 

10 

3b 

10 

.3d 

3c 

Jc 

3d 

3d 

3d 

3b 

3c 

.3d 

USA-54.A (Cont'd) 

APRIL (Cont'd) 

USA-55 

APRIL 

6 

Used key list assigned to USA-59 

Used key list assigned to USA-59 

Broke on SWHIH vice RWHIH 

Broke on TOVVO vice TOVLO 

Broke on WXYGY vice WXXGY 

Broke on JUXLC vice JULXC 

Broke on OSNWY vice OSNWR 

Broke on DX.UAR vice DXAVH 

Broke on IXNUZ vice IXBUZ 

Message indicator was derived 

using deciphering procedure 

Broke on SDFHQ vice SDEHQ 

Message indicator was derived 

using deciphering procedure 

Broke on VUXRD vice VURXD 

Broke on XFA'lll vice EFAEY 

Broke on WYMUK vice WYMUX 

Broke on MSLIC vice MSLIP 

Broke on AOVLP vice APVLV 

Broke on BWTGB vice B~VTGR 

Broke on XKJER vice CMJEM 

Broke on ANVCY vice FNVCY 

Broke on IPZMO vice JPZMO 

Broke on TQFOI vice CQFOI 

Broke on WCHPT vice WCHPM 

i'0F ~CONTROL NUMBER 54-3396- A 

COPY Ol!~ 2J COPIES 

PAGE 6 OF 12 PAGES 

T()P SE€RET 
-wePEQ~~"f, ~.L..J'""7 ... ~ e 

'i39P s~s~ 

VIOLATIONS (Cont'd) 

DTG TRI GRAPH KEY NO. REMARKS 

USA-55 (Cont'd) 

V.AY 

070005Z AON' 3d Broke on VSQEP vice VSTEI' 

220030Z CJV 3d Broke on RKGBA vice RRGBA 

~ 

212115Z BSI 3b Broke on KFNHO vice KFOHO 

USA-56 

• APRIL 

021117Z ALU 3d Broke on SJRDJ vice RDRDJ 

060805Z BJQ 5 Deciphered to YRZNV - broke 

on YRZNW 

062147Z BNG 10 Enciphered message indicator 

using decipher procedure 

062208Z BPI 3d Broke on SZQWR vice SZSil 

12 April 11 Transmitted clear text tape 

182100Z ERW 7 Broke using trigraph EXW 

192103Z FCR 9a Broke on BB vice AA 

210827Z FOQ 10 Message indicator derived using 

deciphering procedure 

291002Z HYR 5 Alignment derived using procedure 

!or first message or cryptoperiod 

~ 

062352Z BTN 1 Broke on AM rotor arrangement 

090700Z CSF l Broke on PM rotor arrangement 

090705Z CSD l Broke on PM rotor arrangement 

09071oz CSH l Broke on P}I rotor arrangement 

090715Z CSK 1 Broke on PM rotor arrangement 

090920Z cso l Broke on PM rotor arrangement 

090855Z css 1 Broke on PM rotor arrangement 

090900Z CST 1 Broke on PM rotor arrangement 

'f0P M~ I COl'i'.CROL NUMBER 54 - 3396 -A 

COPY OF 27 COPIES 

PAGE 7 OF ~ PAGES 

7 

NSA Form 781-ClS 6 Jul 51 T0P SECRET 
fi!eP s:ssa~ 

VIOLATIONS (Cont'd) 

DTG TRI GRAPH 

090905Z csv 

090910Z CTA 

090915Z CTB 

090926Z CTC 

090927Z CTL 

090930Z CTG 

090928Z CTN 

090931Z OTP 

152127Z EGP 

242124Z GIR 

200600Z EQV 

302139Z 

170540Z ETX 

280240Z GRV 

280250Z GRW 

280300Z GSA 

280310Z GSB 

220515Z KIG 

051105Z BXF 

161530Z GST 

NSA Form 781-Cll 6 Jul 51 

W0~"~9t' - ...._, .I......J '--A _._ '-.I......J ..... e 

KEY NO. 

1 

1 

1 

1 

1 

1 

1 

1 

3b 

3c 

3c 

16 

3c 

9a 

9a 

9a 

9a 

3d 

3a 

3a 

REMARKS 

USA-56 (Cont'd) 

MAY (Cont'd) -

i!lli! 

USA-57 

APRIL 

~ 

i!lli! 

8 

Broke on PM rotor arrangement 

Broke on PM rotor arraneement 

Broke on Pl>I rotor arrangement 

Broke on PM rotor·arrarigement 

Broke Gn PM rotor arrangement 

Broke on PM rotor arrangement 

Broke on PM rotor arrangement 

Broke on PM rotor arrangement 

Broke on WKLJE vice WKKJE 

Broke on EOTOV vice BOTOV 

Broke on QINCU vice QYNCU 

Fourth rotor failed to step as 

' scheduled 

Broke on TKDJQ vice GKDJQ 

Broke on AA vice BB 

Broke on AA vice BB 

Broke on AA vice BB 

Broke' on AA vice BB 

Broke on MSLZL vice MJLZL 

Broke on ONXSY vice ONSXY 

Broke on BDQXF vice BDQFX 

COPY OF 27 

!!!eP ,,OL llUMBEB 54 ... 3396 - A 

COPIES 

PAGE OF lP- PAGES 

TOP SECRET 
., 

• g,. , u~~•'-~ _._ e ~OP &:S61*f... 

VIOLATIONS (Cont'd) 

DTG TRI GRAPH KEY NO. RE?r.ARKS 

USA-57A 

APRIL 

012340Z ADE 3d Broke on LANFA vice LANEX 

092350Z BCZ 3d Broke on QYN.XM vice QYWXM 

280435Z DJP 3d Broke on VGRSQ vice VGRSY 

MAY 

020617Z AIJ 4 Reused indicator AA.AlJRSWXLR 

042350Z APO 10 Message indicator was derived 

using deciphering procedure 

080615Z BJC 3d Broke on ESESF vice FSKSF 

230350Z DNK 10 Message indicator was derived 

using deciphering procedure 

JUNE 

160115Z CUN Jd Broke on LJAWV vice LTAl'ITV' 

69loth SG 

APRIL 

18 April 12 Caused by faulty key tape 

~ 

121J.OOZ l Broke on PM rotor arrangement 

121150Z 1 Broke on fl-1 rotor arrangement 

301515Z 1 Broke on AM rotor arrangement 

301515Z l Broke on AM rotor arrangement 

301515Z 1 Broke on AM rotor arrangement 

301935Z DSZ l Broke on AM rotor arrangement 

301940Z 1 Broke on AM rotor arrangement 

302100Z DTH 1 Broke on AM rotor arrangement 

.302200Z DTJ 1 Broke on AM rotor arrangement 

!Oil BEQCtlTROL NUMBER 54 - 2396 - p.. CO.PY OF 27 COPIES 

PAGE 9 OF l~ PAGES 

9 

NSA Farm 781-Clll' 6 Jul 51 T()P SEERET 
,. 

•oPF _._ ....._, Q~_jiSIPJl~Hf' ........ '-" .............. 

'f OP 9E6R:fi 

• 

VIOLATIONS (Cont'd) 

DTG TRI GRAPH KEY NO. REMARKS 

6910th SG (Cont'd) 

JUNE .. 

2 June 12 Caused by torn tape 

3 June 11 Cause unknown 

111300Z BEH 1 Broke on AM rotor arrangement 

181730Z BXY 3d Broke on NGXGR vice NGMGR 

25 June 12 Tape contained consecutive 

blank characters 

6920th SG 

APRIL 

040455Z 5 Alignment derived using procedure 

for first message of cryptoperiod 

231330Z 1 Broke on AM rotor arrangement 

231400Z 1 Broke on AM rotor arrangement 

231405Z . 1 Broke on AM rotor arrangement 

23:V..,50Z 1 Broke on AM rotor arrangement 

MAY 

131320Z 1 • Broke on Al~ rotor arrangement 

14 May 13 COMINT info transmitted to 

weather station 

19 May 11 Switched to text before turning 

off TD 

290744Z EEA 3d Broke on MMCIA vice MZCIA 

~ 

0914ooz 1 Broke on AM rotor arrangement 

100400" 8 Used multiswitch setting 42135 

W9P ffi!le~ CONTROL NUl·iBER 54 -.;;96 - A 

COPY _, OF --.2"'°'7~- COPIES 

PAGE :L OF 12 PAGES 

10 

NSA Form 781-CllJ 6 Jul 51 TOP SE€RET 
• 

'l'OP SB6Ri!i'i' 

VIOLATIONS (Cont'd) 

TRI GRAPH 

070508Z 

072050Z 

6 April 

6 April 

9 June 

17 Jime 

2.3 June 

15 April 

NSA Form 781-ClB 6 Jul 51 

KEY NO. REMARKS 

lst WEATHER WING 

~ 

ll Operator switched to "text" 

before turning off TD 

11 Operator switched to "text" 

before turning of£ TD 

SSO 3RD AF 

APRII. 

ll Operator failed to switch to ciphet 

17 Reuse of key tape 

~ 

JJ TOP SECRET codeword transmitted 

in clear at end of encrypted tape 

SSO SAC 

JUNE 

11 Key tape ran out 

11 Operator failed to turn off TD 

before switching to text 

SPECIAL OPERATING 

CENTER HIGH WYCOMBE 

APRIL 

ll 

ll 

Operator in "text" while 

requesting a correction 

9:'9i' SE::W/ corrrROL NUMBER 54-,396 - A 

COPY ~ OF 27 COPIES 

PAGE: ll OF 12 PAGES 

TOP SECRET 
~ .. 

tOP s;eenm 

VIOLATIONS (Cont'd) 

TRI GRAPH 

6 May 

21 June 

NSA Form 781-CIS 6 Jul 51 

KEY NO. 

11 

JJ 

USAFSS 

~ 

Operator in 11text11 while 

requesting a correction 

SECREr message delivered 

as unclassified 

TeP EB!l9Bii'l' CONTBOL NUMBER 54- 3~96 - A 

COPY Q I OF 27 COPIES 

PAGE 12 OF 12 PAGES 

• 

T()P SECRE'f 
e REF ID: A56996 

SE€RET 

~ LIST .Qf !,!1! FORCE VIOLATIONS 

Apr., May., Jun., 195.!t 

ROTOR ARRANGEMENT 

1. Use or a rotor arrangement for an inappropriate cryptoperiod, day or 

month. (Reference AFSAG 1262, para 5006a(l)) 

2. Use or a rotor arrangement fran a key list assigned to another station. (Reference AFSAG 1262, para 5003b) 

~OTOR ALIGNMENTS 

Discrepancy between the message rotor alignment resulting £ran 

decipherment of the message indicator and the message rotor alignment actually required to decipher the message, although the latter 

was correctly derived. The discrepancy involved (a) transposition 

of letters, (b) substitution of a letter alphabetically adjacent to 

the correct letter, (c) substitution of a phonetically similar letter, 

or (d) errors in encipherment. 

4. Identical message indicators appeared on different messages (or 

transmission sections) enciphered on the same machine. Use or the 

message rotor alignment resulting from decipherment of the message 

indicator allowed decipherment of the first but not the second 

message. The message rotor alignment actually used for encipherment of the second message was properly tailed to the final alignment of the first message. 

S• Failure to tail previously enciphered message. (Reference AFSAG 1262, 

para 6002a(4)) 

6. The message rotor alignment was transmitted in the clear as the last 

five letters or the message indicator. (Reference AFSAG 1262, 

para 6002a(5)) 

KEY GROUP 

7. The trigraphic key-group indicator in the message indicator did not 

correspond to the key group actually used tor encipherment. Reuse 

ot a key group was not involved. (Reference AFSAG 1262, para 5004.b) 

MACHINE DESIGNATOR AND MULTISWITCH SETTING 

8. Use of an unauthorized multiswitch setting. (Reference AFSAG 1262, 

para 6002a(2) or AFSAG 123lb, para 6003a(l)) 

Incl 2 SECRET CRYPTOCLEARANCE REQUIRED