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Challenge 4

Click for Hint You will need to use what you have learned about frequency analysis and pattern matching to crack the first Competition Challenge, though part A should itself be relatively straightforward given that the word structure has not been disguised. Part B is harder because the text has been grouped in blocks of 5, a trick that experts use to make cracking the cipher more difficult. The numerals in the cipher text can be treated as unencrypted in this challenge if that helps at all.

Part A: The Black Museum

JUR DYKR NLH VB JUR BLZR. JUR IYLDX ZKHRKZ VH NCGYA SLZCKH LH JUR VB-UCKHR ZKHRKZ CS DGVZR LJ BRN HDCJYLBA PLGA. JUR UVHJCGP ICCXH (CG LJ YRLHJ, NVXVERAVL) JCYA ZR JULJ VJ ULA IRRB HRJ KE IP VBHERDJCG BRLZR LBA ED GLBALYY HCZR JVZR LSJRG LEGVY 1875 LH L NLP JC KHR JUR EGVHCBRGH’ EGCERGJP HJCGR JC VBHJGKDJ BRN GRDGKVJH VB JUR LGJ CS ARJRDJVCB. JUR BLZR SVGHJ LEERLGH VB EKIYVD VB LB LGJVDYR VB JUR CIHRGMRG BRNHELERG VB 1877, LBA JUR UVHJCGVLBH HLP VJ NLH DCVBRA LH L TGVHYP URLAYVBR IP L WCKGBLYVHJ NUC NLH HBKIIRA IP BRLZR, IKJ V LZ BCJ HC HKGR. VJ AVAB’J HRRZ LB LDDVARBJ JULJ ACKTYLH IYLDX NLH YCCXVBT JC HRJ KE L JCE HRDGRJ LGDUVMR VB YCBACB LJ JULJ JVZR, LBA HDCJYLBA PLGA TLMR UVZ JUR ERGSRDJ YCDLJVCB. VJ NLH DRBJGLY LBA RLHP JC LDDRHH. VJ ULA HRMRGLY RBJGLBDRH, NVJU L HJRLAP SYCN CS MVHVJCGH, BCJ LYY CS JURZ RBJVGRYP GREKJLIYR, JULJ NCKYA AVHTKVHR JUR DCZVBTH LBA TCVBTH CS JUR LTRBJH LBA CSSVDRGH CS IYLDX’H BRJNCGX. IRHJ CS LYY VJ ULA JUR RBJVGR ZRJGCECYVJLB ECYVDR SCGDR HJLBAVBT TKLGA, NUVDU NLH TGRLJ SCG IYLDX, LBA JCKTU CB ZR. VJ NCKYA IR JUR VARLY YCDLJVCB SCG JUR HULACN LGDUVMR.
HDCJYLBA PLGA ULA ZCMRA JC BRN EGRZVHRH HRMRGLY JVZRH HVBDR VJ NLH SVGHJ HRJ KE, IKJ V NLH IRJJVBT JULJ JUR HULACN LGDUVMR ULA ZCMRA NVJU VJ, LBA V HERBJ JUR IRHJ ELGJ CS JUGRR NRRXH HDCKJVBT JUR BCGZLB HULN IKVYAVBTH LBA JUR BRN “BRN HDCJYLBA PLGA” BROJ ACCG LJ JUR DKGJVH TGRRB IKVYAVBT. VJ VH BCJ RLHP JC AC JULJ NVJUCKJ IRVBT HECJJRA, URBDR JUR BVTUJ JVZR GRDCBBLVHHLBDR VB JUR GLVB. JUR NLJRG LBA JUR DCYA EYLPRA ULMCD NVJU ZP ZCCA, IKJ LYHC NVJU ZLBP ARJRDJCG HPHJRZH HC VJ NLH NCGJU JUR AVHDCZSCGJ.
BC-CBR NLH YVXRYP JC TVMR ZR JUR GRLY EYLBH CS JUR EYLDR, JUCKTU ULGGP NLH ULEEP JC EGCMVAR ZR NVJU L DCEP CS JUR CSSVDVLY YLPCKJ, LBA V KHRA L YVALG HPHJRZ JC ZLE LH ZKDU CS JUR CKJHVAR LH V DCKYA. DCZELGVBT JUR JNC HUCKYA ULMR GRMRLYRA KBZLGXRA HJCGLTR LGRLH LBA TVMRB ZR HCZR VARL UCN V ZVTUJ TRJ VB, IKJ BCJUVBT HUCNRA KE KBJVY V ULA L YKDXP IGRLX. YVJRGLYYP. V ULA YCNRGRA JUR YVALG ARJRDJCG ACNB L HULSJ CB JUR DKGJVH TGRRB GCCS, UCEVBT JC TRJ L TYVZEHR VBJC HCZR CS JUR BRLGIP GCCZH. VJ ULA WKHJ LICKJ GRLDURA TGCKBA YRMRY NURB JUR BPYCB YVBR HBLEERA. VJ ZLAR L URYY CS L GCN LH VJ DYLJJRGRA ACNB, LBA V EGRELGRA JC GKB, IKJ BC LYLGZH NRBJ CSS LBA, ZCGR VZECGJLBJYP, V BCJVDRA HCZRJUVBT HVTBVSVDLBJ. VJ ULA JLXRB LGCKBA SVMR HRDCBAH SCG JUR YVALG JC DGLHU ACNB, NUVDU, LJ L GCKTU RHJVZLJR, ZRLBJ VJ ULA SLYYRB SGRR SCG LGCKBA CBR UKBAGRA LBA JNRBJP ZRJGRH. JULJ NCKYA ULMR JLXRB VJ L YCBT NLP KBARGTGCKBA, LBA JURGR NRGR BC ILHRZRBJ GCCZH ZLGXRA CB JUR EYLBH VB JULJ YCDLJVCB. V NLH EGRJJP HKGR V ULA SCKBA JUR HULACN LGDUVMR: BCN V WKHJ ULA JC SVBA L NLP VB.

Part B: The Three Emperors

ATRDW PFKFD KITGG TPGTD PRGFG ZGTPP RFGRD PIDZM KYIEQ GTPLR QKYGT PFZHG TPDYD PIKZY GTPZG GZXRY FRDPD PFGWP FFRYL KYGTP YZDGT GTPGT DPPPX BPDZD FRDPR IDZMK YIGTD PRGGZ ZHDKY OWHPY APGTP OZDPK IYZOO KAPFP PXBRD RWQFP LOZAH FFPLP YGKDP WQZYO ZDXKY IRWWK RYAPF RYLHY REWPG ZLPGP DXKYP GTPKD EPFGF GDRGP IQKGT KYVGT PQRDP XKFGR VPYKY GTPKD ZHGWZ ZVGTP QOZAH FGZZX HATZY GDPRG KPFRY LYZGP YZHIT ZYDPR WBZWK GKVRF JZYDZ ATRHM DZGPG TPWRM ZOBZM PDIZJ PDYFG TPMZD WLZOF GRGPF UHFGR FGTPW RMZOI DRJKG QIZJP DYFGT PBTQF KARWM ZDWLR YLMPR DPBPD TRBFG ZZXHA TKYAW KYPLG ZZJPD WZZVG TPDPR WXKIT GZOGT PXZDP BZMPD OHWRY LGTPK YPJKG REKWK GQZOK GFBZW KGKAR WKYOW HPYAP ZHDGR FVYZM KFYZG GZATZ ZFPRO RJZHD PLBRD GYPDG ZAZYG DZWGT PZGTP DFGTR GMRQD KFVFM RDRYR WWKRY APMKW WPYAZ HDRIP RAZHY GPDRW WKRYA PRYLR LRYIP DZHFP FARWR GKZYK YFGPR LZHDF GDRGP IQFTZ HWLEP GZXRK YGRKY RYRLX KGGPL WQHYP RFQBP RAPEP GMPPY GTPPX BPDZD FGZIP GTPDG TPQRD PGTPE KIIPF GBZWK GKARW GTDPR GGZZH DPXBK DPEHG RFPYP XKPFZ OZYPR YZGTP DGTPQ RWFZG TDPRG PYZHD GDRLK YIDZH GPFMP YPPLG ZKYLH APGTP XGZMZ DVGZI PGTPD MTKWP BDPJP YGKYI GTPXO DZXOZ DXKYI RBZMP DEWZA RIRKY FGZHD KYGPD PFGZH DXZFG KXBZD GRYGM PRBZY KYGTK FKFAZ YOHFK ZYRYL XKWLL KFGDH FGGTP EPFGZ HGAZX PMZHW LEPGZ PYAZH DRIPR LQFOH YAGKZ YRWRW WKRYA PEPGM PPYRW WGTDP PGTRG XRVPF KGTRD LOZDG TPPXB PDZDF GZOKI TGZYP RYZGT PDZDH FRYLK YGTPZ GGZXR YADKF KFKGT KYVKF PYFPR YZBBZ DGHYK GQGZL ZUHFG GTRG