Cipher 24: ADFGVX

For this week, I’ve decided to use a 95-year-old cipher employed by the German army during the First World War. You have the advantage, however, of the far greater computing power available today.

FFXGDXXDG VVAFVXDDA DAVAXDFXG DVDAAAXFV AFAVGVVDV 
XGDXVXGAX AFDAVXADA GDFVFDAFF AXDDAFFVG DGDDDXDAD 
GAXVGFXAA DAFFFGXFV XAAXAFFAG VXDVFDVVA AGDVGXVAX 
DDFFVADFD FDAAADAAV AXVAAXDFV VXADVDAAV GDXDXAGFF 
VVAXVFXVV AGDAFXDVX DVAVDDXAV VAFVVXAAA FXVDVFFVA 
VAVDFDDVD VDVDAAAAV DGGXFDAFX DFXVVXADD ADDAAVXGF 
GVAAGDFAD AAVXFDGDG XFVGADFGD AVXXVVVVV XDVDAFDAD 
VAXVAXVVD GVAAVXXVV XVXXDVAAX AFVAAXFXG GXAVFDVFA 
VDVVGDFAV XAXXAXAVG VVVXAAGVV ADDXDVVVF VFVAVXXVG 
DAXAFGAFD DDVGDFXGV FFFFDVVAG VVVAGGXVA DAXFDAGFA 
VDAVDXAAA AVFXAVAVV XDVVVADVA ADDFVADVA FADAADFDV 
AGXVDVAVD FXADAFFVG GVDFDAGXF GFAADDXDV GDADGXXDD 
XFVVAVXGA VGXDXGVVD XDGDDFFVX AXADXVAGV VDAVVVAAV 
VVFXXVADV XDAXGFAVV DAFFXVDFV FFGDXFADV AGFDVAAAF 
DAADAFXAV VAVVFDAVD FVXVVXXAA DVXXAVAFA ADAXAAXVG 
VVFFFGXAV XAAAADFAG DVVFFDGFX AVVVADFAD DDVVFDAAF 
ADDAVAAAA ADDXAVAVA DXDVGXDVV DVFDFAAFV FVDXAVFGD 
VADFDGDVG DVVVGXFAD DVFDVVAFF VFVADVDXV AVAADAAXV 
AXVAAGDVA ADVXDAAXD

I’ve also used the same key for both the transposition and substitution stages.

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