User:Hashk/Sandpit/3

One

Let's see how long it takes.

AGMZP UHLKO WMAEP KFUMX TGEPO ZFSAT OPIAA BXJTN YLISX SCEVE PGONY
TACLZ QSBFV NBFVZ HBFXV GSMLV RWGBB EPXVP UDQAD QTAHS CLZLS KDBKW
MFHMA ZXLWM SZCTA TACNB CAZHZ ACOPZ ZVZXK IPROZ GPGCT MCDBN LUDDW
QQZUT IGDTV YOAUM AAABX MUUXV JUCDB NLFGJ BFTLK AAWSZ NTVOZ LDDEG
SWANA SCLGS MYAXF RPVDI CMNDH BELXG UWAHM GFXYO HHXVN YWRKV ACVNM
WTUXS GBUPN UBGLP QADBX HIOPA NMCZJ AWGJR QWXLT FSNBC IXLTK DVNMT
KAKSS MUPEO SEUJB NYGZO BFVNB CGUBJ MXKXW QQLYG GIFFJ YATFI QNWBX
HWWXB PLVHL LGBMB YMKSL WHTBH IYFHM ETRLA KPVDT IAFXG MMWGA GCIVZ
MAIKU TVMHG VSQGN POUZA RIYWQ ZZBFR MVLUA ZNSAT LDMCP GYHWZ PWTLN
HDZQF UVPGY IPRTZ IVKHH MVDXK UWSAW GZNZP FWPBG SMLVN FIIVY AZHGV
XVTEP KYXFD EJLBI OBFVU LCMLS XUIQB YMSWM QIPVD LXPIH XVTDI IRBUP
VGSMR WESJO UTVMH LALWA OMXDA SIQFS WASWO XAUQW X

Word of caution here: this is not an entirely trivial text transformation. Although methods for deciphering this have been known for a long, long time, it will take "proper" cryptanalysis, this isn't exactly a puzzle-level challenge. This cipher, like so many others from the past, was called "unbreakable" at some point.

Solved first by ZIPO around 08:31, 20 October 2010 (BST) :)

Two

ZWNS YSOE EVNM OCYD LDYO ECVO ZPYB XOBY NA

ZGFY PZBG FYPL KTSE GOOE EGSP DOIS TPOB DVCD LMTD USCT NDZE GNTP
OBFI TPPX QWMX KTFH ULKT RETC YDEX GFMN ITQN MANT LILX OBPX QWMX
GEHF AFOQ MAEG RDGU GEOB TCTP OBTP KTXN MODX KYZY KTLX

VKOE ZXIP NAHF SPKW DYGE XNLD EISY QONA OROB NKBH NDRD FYSL XZAM
FGNA TPPX BKAY BHCT XDFM ECDY OEQO CTGO KTZU DYCO NSLM ZOZX IPQO
DOIP YOAD OQXT GDTE GIZS EHTZ BNBN CGST SNSI SDEY OBHF SPLA AMSI
OXVK OEQO CNHN DMDT NPYS ZGOC ESOB VENS ZMXF GEMA GLGN TPGE TEBY
CTXT WPXM YHSZ FMLX HNBO KYZM AMBG ESLT WPXM YBEV OFDU DAAE NANP
AXTP YSOB TGPK GDQN HNOE PNNK BHND MABL DXGV LIEX FMLD XPPO NADX
OBCL DSIS NADP HNGT LYKT NADY TGSZ OEDG LXWP XMYH QZHN OEPT CGHF
TCQO ONFM GIKS GNEX DAYB AZGN ANAO GDSN TEMA LDFM EILN EGNP OBUX
CTDT SNSI FIER MXDN QLTY TEDN QLTY LMZM FGNA MAES OBMO GNSY PNKR
GENB ALTC ZFGE FYPN IEOD OPIP PGTP IPNV NAYO TZOY EKIY EOER NLZE
FYSL PNOC NBZX IPCG OFUK ALYO YDMO UGIE PGLD AEZD TEPX OSGE NVEF
YLEC XGIL NYOB XGZM UGIE YCEY YSLT SOZU TCZE DTBG EOPZ OKLT SAPN
SDRY IPPW NAGE DLDL EYGZ TCDX GNWK OBGL FYSP NZDT MAGL NAIF ISUO
FYIE NVTD OHMZ GELZ PNOP CTOB IFNA BAXT DOLA NHYB GLZP ZUNU YTPI
OGYN MACX OESY YTEF BKMA BGNV UGEY XI

Yet another scheme from the past, used by several armies in both World Wars. Fairly strong for a quick manual cipher, even if it is no challenge at all for modern day cryptanalysts.