Chapter 6: Analysis of a five wheels Hagelin Cipher Machine

---- Solutions

1. Plaint text:

HONG KONG WAS ATTACKED ON EIGHT DECEMBER AND FELL ON TWO FIVE   
DECEMBER COMMA WITH CANADIAN FORCES AND THE ROYAL HONG KONG 
VOLUNTEERS PLAYING AN IMPORTANT PART IN THE DEFENSE

Inner Key:
	ABCD_FG_I__LM__PQR____XY_
	_BC___GHI___M__P_R_T_VX
	_BC__FGH_J_L_NOPQ____
	A_C__FG_IJK_MN_P__S
	AB_D__GHI_KLMNO_Q
	12:7:1:3:2


2. Plain text:

No. 1 - THE ALLIES SUFFERED MANY DISASTROUS DEFEATS 
        IN THE FIRST SIX MONTHS OF THEWAR

No. 2 - BRITISH AUSTRALIAN AND DUTCH FORCES WERE 
        UNABLE TO PROVIDE MUCH MORE THAN TOKEN 
        RESISTANCE TO THE BATTLE HARDENED JAPANESE

No. 3 - TWO MAJOR BRITISH WARSHIPS WERE SUNK BY A 
        JAPANESE AIR ATTACK OFF MALAYA

Inner Key:
	_BCDEF_H___L__O_QRS_U__YZ
	_BC_E_G___K_M_OP_RS_U_X
	__C__F____K_MN___R___
	__CD_FGH_JK_M___Q__
	_BCD_FG_IJK_M_OPQ
	1:4:11:2:7


3. Plain text:

JAPANESE AIRCRAFT WERE MAKING ATTACKS ON NORTHERN AUSTRALIA 
BEGINNING WITH A PSYCHOLOGICALLY DEVASTATING ON THE CITY OF DARWIN DOT

Inner key :
	A____F___J_____P___TUVX_Z
	_B_D_FGH_J___NO__RSTUV_
	_BC_EF_HI__L____QR__U
	A__D__GH_J_LMN__QR_
	__CDE_GH_J_LM__PQ
	6:2:1:13:3, with one overlap : (3-5)


4. Plain text:

No. 1 - FILIPINO AND US FORCES RESISTED IN THE 
        PHILIPPINES UNTIL EIGHT MAY ONE NINE FOUR TWO

No. 2 - WHEN MORE THAN EIGHTY THOUSANDS SOLDIERS 
        WERE ORDERED TO SURRENDER DOT

No. 3 - BY THIS TIME GENERAL MACARTHUR HAD RETREATED 
        TO THE SAFER CONFINES OF AUSTRALIA 

Inner Key:
	ABC_E__H_____NO_QRST_V_Y_
	_B__EF____KLM__P_RST_VX
	ABCD_F_HI_K_MNO____T_
	A_CDE___I_KLMNO____
	AB__E_G_I__L__OP_
	3:2:13:6:1, with 2 overlaps : (2-5) and (4-5)


5. Plain text:

FROM HEADQUARTERS TO MAJOR GENERAL VANDERGRIFT STOP MOVE FIRST 
MARINE DIVISION FROM THE UNITED STATES TO NEW ZEALAND STOP

Inner Key:
	__CD_FG_IJ___N_P_R_T__XY_
	A_CDE___I_K_M__P___TUVX
	A_C__FG_IJ___N____S_U
	_B_DEFG_IJKL___P_R_
	AB_D_____J_L_N__Q
	4:1:11:7:2  sum: 4+1+11+7+2=25-(2+1+2)=20
	5 overlaps: 2-5:2, 3-5:1, 4-5:2