Chapter 4: Analysis of a three wheels Hagelin Cipher Machine ---- Problems 1. Wheel-Lengths: 17, 19, 21; Message begins: "By this time". YJDOD VQLKD OEEZX OUDZI XOWRK VAHUI IWHWA JVATO HADPA UHDUC DOSDD RZORY WYKBC QPHHC TMIEJ Hint 1 : QR RYHUODS Hint 2 : WKH IROORZLQJ ZRUG LV DOOLHG Hint 3 : WKH IROORZLQJ ZRUG LV FRPPDQGHUV 2. Wheel-Lengths: 23, 25, 26; Message begins: "New Factory" PVMDI QAOOW GATWC BOLLD ZMIXN MSHML MUAYK FOJOR FGJOR DJNAQ QYZDQ NWZFN IPSWL GVAYT Hint 1 : QR RYHUODS Hint 2 : WKH IROORZLQJ ZRUG LV SURGXFWLRQ Hint 3 : WKH ODVW ZRUG LV WKLFNQHVV Hint 4 : D SUREDEOH ZRUG : DUPRXU 3. Wheel-Lengths: 19, 23, 25; Message begins: "The Enemy" GVVIK UMVMN WSZJI IIBLA AEHOA IHWWO FJEKK PLCGV WPPLJ VLHEX MXPAW IZKFT UNGHY PIBPC SCTDF Hint 1 : WKHUH DUH WZR RYHUODSV Hint 2 : WKH ZRUG WKH LV SUHVHQW WKUHH WLPHV Hint 3 : D SUREDEOH ZRUG : LQYDVLRQ Hint 4 : WKH IROORZLQJ ZRUG (DIWHU "WKH HQHPB") LV VXIIHUHG 4. Wheel-Lengths: 21, 23, 25; Message ends: INVASION UXROF NGMQU ZNDIQ LGIHZ ESMUH LNICI ACPWJ CKKCX GHHLN RFFGW PMLPA IQFRU PHHVR Hint 1 : PHVVDJH HQGV : DLUERUQH LQYDVLRQ Hint 2 : PHVVDJH EHJLQV : WKLV Hint 3 : WKH VHFRQG ZRUG : ZDV Hint 4 : SUREDEOH ZRUG : GDVK 5. Wheel-Lengths: 17, 19, 21; All messages have been enciphered whith the same initial "Wheel settings". No. 1 - LZVXI QAXDF QVXCB GVEHT WOGVV TTDTZ VILXH GCJIY HVNPH NWZDO JBLVH LJPFT USAOY YTVHC No. 2 - OZVLB FUXKE WHARY BMUCY KOWHK TGADK ZLFLA VTSIF TNFGP YCBZG TRYLT PKZRI SOXXC RVBYO No. 3 - HTWLC VQZXF OSVHF OVVIC QTLBY VSOHB GILXD AXWEL TZCYU MNMPT AYIAV TWBFB TEFYT BBTEH VRHWY RXMIQ WHFLP YFOZH KOTLT Hint 1: WKH ILUVW PHVVDJH EHJLQV EB WKH ZRUG ZKHQ Hint 2: SUREDEOH ZRUG : RIIHQVLYH Hint 3: SUREDEOH ZRUG : JHQHUDOV Hint 4: SUREDEOH ZRUG : HQHPB Hint 5: SUREDEOH ZRUG : ILJKW Hint 6: SUREDEOH ZRUG : IRUZDUG Hint 7: SUREDEOH ZRUG : LQWHOOLJHQFH 6. Wheel-Lengths: 19, 21, 23; All messages have been enciphered whith the same initial "Wheel settings". No. 1 - HTCAB YXAXH AVAZE HOUAU SUSHC OPJNH VLDCS UQCOV ZTYPG YDCPS NDIZV CDDFS RBXLX GBTDQ XBMAF MRAUG DHVYX No. 2 - HTCAB YXAXH AVAZE HOUAU SUSHC OPJNH VAUWB ZWNVV WRWYV AYIBP LQCNS XHEDY YTUYK FXABD SPZMK VMYAU CKHNY VXXXX Hint 1: SUREDEOH ZRUG : HQLJPD Hint 2: SUREDEOH ZRUG : LQWHOOLJHQFH Hint 3: WKH RSHUDWRU IRUJRW RQH C EHWZHHQ WZR ZRUGV 7. Wheel-Lengths: 26, 21, 19; All messages have been enciphered whith the same initial "Wheel settings". No. 1 - MTQAU JLGPF KEHSZ AVVAN FDUZV KGTPG LFVZD GYZVB RQZYH IVOLO GAUWZ OXGSE OFIFA BIBAE OOUYI MOBWN JGGZQ VABRT GGJBL WMSAG No. 2 - SWYAI FXMEW HNKJZ KTSZZ GFGOZ AVCOJ WOIAE TKHGB YZUGA ZNDIW FIBEI SJTES OIGYX SXAWP AOOGN Hint 1: RQH PHVVDJH EHJLQV EB WKH Hint 2: SUREDEOH ZRUG : SDUDFKXWH Hint 3: SUREDEOH ZRUG : IDFWRUB Hint 4: SUREDEOH ZRUG : SURGXFWLRQ Hint 5: WKH VHFRQG PHVVDJH HQGV EB WKLFNQHVV Hint 6: QR RYHUODS 8. Wheel-Lengths: 17, 19, 21; Probable word: "THE REST OF" OABRQ VFRHR AGDBT KBYMI EWAKN GFUGA QSAYU MFNOC ZQOPN HIMXO BNINB LXCOF VAJXN OIXGR Hint 1: QR RYHUODS Hint 2: WKH PHVVDJH HQGV EB WZR C Hint 3: PHVVDJH HQGV: GHVHUW Hint 4: PHVVDJH EHJLQV: WKURXJKRXW 9. Wheel-Lengths: 25, 21, 17. Lug-settings and Pin-settings of the cipher Machine used to encipher the following messages are the same. Only the "starting points" (or wheel-settings are different. Further, the text of both messages is the same. Moreover, the wheel-settings wasn't changed after first message enciphering. Consequently, we can decipher the two messages in a row. No. 1 - GODYH ZVCYG FNLFC JFZHV DAXQE WCJDR IWRET SYLRJ SBAWC BEAUV ZOGEQ ICIGX ACZRG SVEJR CLRZK No. 2 - WZDZR YICXI FDLUA UUZUV OQGPE FDYDR IUIEI UICRS RMPJC BOAJW ZOIUR YARWV NCKGR RXOJI CMRYZ Hint 1: PHVVDJH HQGV: VWDUWHG Hint 2: SUREDEOH ZRUG: LVODQG Hint 3: SUREDEOH ZRUG: EDWWOH Hint 4: WKHUH DUH WZR RYHUODSV 10. Wheel-Lengths: 17, 19, 21 The following two messages contain the same plaintext, but have been enciphered with different "wheel settings". Read the messages. No. 1 - RZVLK FWRQL GSGEB MHKPS SWHDD SKWPV QDXDQ VBFKY OAWTE DQWGJ ERZVL LANYN HZZWF NEUQI No. 2 - JWGBK XWWOD NZFEV TODKY MXDGG SEESS QVELJ OIXJV PHWOO IRVZN HKTCE LSMGO DGFWJ KHBJA Hint 1: WKH ODVW OHWWHU LV D C Hint 2: QR RYHUODS Hint 3: PHVVDJH EHJLQV: WKHB Hint 4: SUREDEOH ZRUG: LQYDVLRQ Hint 5: SUREDEOH ZRUG: GRRPHG