vulcan-cryptanalysis

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FE57 : C4 07 " " andb #$07 . . . . . . . . . . . . . . . . FE59 : 27 04 "’ " beq $FE5F FE5B : 08 " " inx FE5C : 5A "Z" decb FE5D : 20 FA " " bra $FE59 ---------------------------------------------- FE5F : 39 "9" rts ---------------------------------------------- FE60 : CE 00 51 " Q" ldx #$0051 FE63 : D6 69 " i" ldab $0069 . . . . . . . . . . . . . . . . FE65 : 27 04 "’ " beq $FE6B FE67 : 08 " " inx FE68 : 5A "Z" decb FE69 : 20 FA " " bra $FE65 ---------------------------------------------- FE6B : 39 "9" rts ---------------------------------------------- FE6C : 5F "_" clrb FE6D : 86 01 " " ldaa #$01 FE6F : 9B 4F " O" adda $004F FE71 : 97 4F " O" staa $004F FE73 : D9 50 " P" adcb $0050 FE75 : D7 50 " P" stab $0050 FE77 : 96 4F " O" ldaa $004F FE79 : 27 01 "’ " beq $FE7C FE7B : 39 "9" rts ---------------------------------------------- FE7C : 96 6B " k" ldaa $006B FE7E : 26 22 "&"" bne $FEA2 FE80 : 96 72 " r" ldaa $0072 FE82 : 81 01 " " cmpa #$01 FE84 : 22 1C "" " bhi $FEA2 FE86 : C1 25 " %" cmpb #$25 FE88 : 22 01 "" " bhi $FE8B FE8A : 39 "9" rts ---------------------------------------------- FE8B : BD F1 D2 " " jsr $F1D2 FE8E : 96 50 " P" ldaa $0050 FE90 : 81 40 " @" cmpa #$40 FE92 : 26 03 "& " bne $FE97 FE94 : BD F1 53 " S" jsr $F153 . . . . . . . . . . . . . . . . FE97 : 96 50 " P" ldaa $0050 FE99 : 81 50 " P" cmpa #$50 FE9B : 22 01 "" " bhi $FE9E FE9D : 39 "9" rts ---------------------------------------------- FE9E : BD F5 87 " " jsr $F587 FEA1 : 39 "9" rts ---------------------------------------------- FEA2 : BD FE 60 " ‘" jsr $FE60 FEA5 : E6 00 " " ldab $00,x FEA7 : D7 4A " J" stab $004A FEA9 : 96 50 " P" ldaa $0050 FEAB : 84 01 " " anda #$01 80
FEAD : 27 04 "’ " beq $FEB3 FEAF : 86 80 " " ldaa #$80 FEB1 : A7 00 " " staa $00,x . . . . . . . . . . . . . . . . FEB3 : BD F1 70 " p" jsr $F170 write buffer to display FEB6 : BD FE 60 " ‘" jsr $FE60 FEB9 : 96 4A " J" ldaa $004A FEBB : A7 00 " " staa $00,x . . . . . . . . . . . . . . . . FEBD : 96 50 " P" ldaa $0050 FEBF : 81 E0 " " cmpa #$E0 FEC1 : 26 03 "& " bne $FEC6 FEC3 : BD F1 53 " S" jsr $F153 . . . . . . . . . . . . . . . . FEC6 : 96 50 " P" ldaa $0050 FEC8 : 81 E9 " " cmpa #$E9 FECA : 22 D2 "" " bhi $FE9E FECC : 39 "9" rts ---------------------------------------------- FECD : CE FF AD " " ldx #$FFAD (6 spaces) FED0 : BD F1 C0 " " jsr $F1C0 put table chars in buffer FED3 : B6 01 FE " " ldaa $01FE FED6 : 84 07 " " anda #$07 FED8 : CE 00 51 " Q" ldx #$0051 FEDB : DF 63 " c" stx $0063 FEDD : BD F1 AF " " jsr $F1AF convert oct to char FEE0 : 96 51 " Q" ldaa $0051 FEE2 : 84 7F " " anda #$7F FEE4 : 97 51 " Q" staa $0051 FEE6 : 39 "9" rts ---------------------------------------------- FEE7 : CE 01 00 " " ldx #$0100 FEEA : DF 63 " c" stx $0063 63.64
Page 1 and 2:
Vulcan: A Proprietary Cipher of the
Page 3 and 4:
As a final comment concerning Motor
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known how vulnerable this cipher ac
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7 Figure 3: SC76807 Die Shot
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of the SC76807 in a later section,
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At the far right side of the chip i
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signal. The WE input on Pin 9 and t
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its and are always set to 0 by the
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4 DVP Key Loader Based on our analy
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4.2 Reverse Engineering Understandi
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5.1 Key Schedule We created an Octa
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plaintext bit (i.e. we are mounting
Page 25 and 26:
cryptovariable in real time solely
Page 27 and 28:
exposed, it would be enlightening i
Page 29 and 30: [6] Motorola Encryption Topics, htt
Page 31 and 32: % form 8-bit data word from 7 bits
Page 33 and 34: B Vulcan Encrypt Simulation %------
Page 35 and 36: D Vulcan Cryptanalysis Simulation %
Page 37 and 38: 0,1,0,0,1,0,0,0,0,1,0,0,0,1,0,1,0,1
Page 39 and 40: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
Page 41 and 42: c = bitxor(c,bitand(cv8(7),ctd(nn-2
Page 43 and 44: E DVP Key Loader Firmware Disassemb
Page 45 and 46: F09A : BD F1 C0 " " jsr $F1C0 put t
Page 47 and 48: F166 : 5C "\" incb F167 : 20 F9 " "
Page 49 and 50: F22C : CE FF 9D " " ldx #$FF9D Load
Page 51 and 52: -----------------------------------
Page 53 and 54: F3B9 : 81 04 " " cmpa #$04 F3BB : 2
Page 55 and 56: F48B : 39 "9" rts -----------------
Page 57 and 58: F553 : 39 "9" rts -----------------
Page 59 and 60: F62C : 8E F8 E2 " " lds #$F8E2 tab:
Page 61 and 62: F707 : 7E F9 10 "~ " jmp $F910 disp
Page 63 and 64: F7CA : 97 82 " " staa PB F7CC : 96
Page 65 and 66: F87F : 08 " " inx F880 : D6 74 " t"
Page 67 and 68: F947 : 97 82 " " staa PB F949 : 88
Page 69 and 70: FA05 : 5A "Z" decb FA06 : 26 F4 "&
Page 71 and 72: FAE4 : 27 03 "’ " beq $FAE9 FAE6
Page 73 and 74: FBC8 : 27 05 "’ " beq $FBCF . . .
Page 75 and 76: FC80 : 01 " " nop FC81 : D6 74 " t"
Page 77 and 78: FD31 : 20 08 " " bra $FD3B --------
Page 79: . . . . . . . . . . . . . . . . FE0
Page 83 and 84: FF61 : BD F1 70 " p" jsr $F170 writ
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vulcan-cryptanalysis

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