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The National Cipher Challenge

Challenge 10

RULE REMINDER: Rapid fire multiple submissions put an unreasonable load on the servers and make it difficult for others to submit. Anyone who makes an unreasonable number of submissions will be open to disqualification. In the first instance this will mean that anyone who submits more than 20 times in 10 minutes will be disqualified.

There are sharper time bands for this final round, and speed matters, but accuracy always beats speed. We will be delaying feedback for a few days to give you time to work with the cipher without distractions from us. Please don’t leap straight onto the forum on day one and start asking for hints, we won’t let any through at first.

Good luck,

Harry and Jodie

Mea culpa

PCIKH ZLRLD YSHYY GIYOD XRNND GBSZN HDNBP MQHWY JDXNO AOWNU XKOPF MYMND SMGOI UIEHZ ZJACZ RNGQX NYTMA SEQQC CRFLA IPNMY QTTKP YXZIM PSYIV HWQNZ HFZDB YQTFF DTTRV OHPZD GVTQT UNMVP FMMSJ NHZJR SMMKR MVBHJ PGNLX HLQDF SKHRI SPABD PDAOC QEVBH YEOCB TMADK FOUAC IZGNG NELUE YVNIW ZSTGU XJJPV HYFDY SIJVJ MIHAP FDITC ZSRGU WOEYU ZDTQT ZTVGA ZFZRB EWIWG ULRGL EJFDD XLHMP CDCRT UJDXX NLEJC TZNBN MRQBH QKITD DJPDT QUABX CFBCC GJKZX YQEIM ESMCY IWEPK JXYAG BDMKZ BHFDL UHTXC VXMGA QLYFX QPTSF FOCIY BBRUD JDXMO UOFKD BBGHY SDXVP PFAZN TGHRT COWFO LELWI YJLHG DOOCZ DFXLH JTJMJ XOFBR GQNUH HXHRQ HOOUW LFZAP NOGUQ SCSVU THIKQ QTPQQ UXBNP TNSDF VZAIK JHHBH VZDLJ GYINT APNWP FUCSI KZTNB AKCQA MFRHL KHVMS LDRDJ HJMBH BERLC ESUWE SJTCL RMQGH THKZX CMHFK HTBVL SSYHV MDSQQ OCWVJ LNCAV NQETG QXNLH VHDSU AUXRV DBYQA QFZTU JLWMG ZACBP ZTHWU EWWNC AZYRE UQSVJ YLVCY FDCFD FFKTF OKQFD PSGVM IKUBW YHFUO IMVZT PZZFQ BOWGU IIZOM BOXQG VDTJG YMPNS CHLMC QGJCL PJFPF BQDDW JHHOP ECORP DDFNR PBHDS MGHWU POBFG XBPDD JUFSA KYMMZ PDUOE ISQHN CAOQV HPUHG TSTQC WPZGH DZLKM CXAXL CFSGH HTSPA UODEP SGJRA GNCWK MTRPY QMKZO QBDPO UBDBF YRCNP LZDUT GGJTX NWXNT FZIHJ JMKYG UYCTN EGUXM KJWWD CAYCU JYGLY RDLFZ VFDHI SIOIA QPPJW IXKZX JMKQC BTJQQ SKZOM YEMXV QXDFM KIRJZ YREUJ HUZKL VJXOT RFBYE ALNZN PGMTI GFEXK VNCRP MZSGY TSLNC AMPDS JFHRY GULQS DONPX DVLBQ JQIBT RHGBS ZZVZN MZZFW SUIQH OMOQY MDBPG XTVYM BCZGE QPIVO BNCDF KVHFP BSZSL MCKDR BFBYJ KMYMJ XLHDP QZIMK YIWKA AYCVO RFWCR EIJNF GGUXM GAQOI ZGGVX DBAMQ JQIBA EPHVI WBPKN RZIRJ THZJX WJCKG REUJD XNZTI HLPNR HIUIX HLCAO LDVFT WSPTV ECRLF VRDKS LXXCA OGMWI KFLHG ZMRGT XYQPH IQFSB QFJSK OQZMS MAPJD TPBGD YEKXL QEZCN FIGUW JRMZN CAQPH XMFME XWASC QYHTD XJLBT OYCKB IGSFM GMZHF LSHJU UILGY LRPTY VUWJF XYYMW PKZLM OLXNM HBRYY RBFBO DALNV GBUGI DJBSZ IHVCK VQBFG UWMLY ODBLH TXQXP IHLIW OIBYO CQKAH HJBEM VTICW EBLBT NBCAE OGEJW PBDHB RDSUK QKTAY MZETB ZSCJZ FGYRU LPJGS GQZNR SMBKR QAHHY ELXLX AMRDD BUHVN KZWOW PEFOV UJHTM NAAZD TXGHR YNLJD CTZRG HCRFF CGHBP ZNECQ YSQUW FXAQE GDDNZ HCOXB AZMFC STFXL VCGLE JWIXZ FRIPN ZJNSF ELVHR LBQOX QFGPW VKPYM ABLBR ZRWII GULBS RZRRL YKZIM ZQAMM YNUPS QOUIA YLZQF DAVKF CODFL RPJTL RLCPB QSYGF GJIGA VCJJL DSHFK UQTZP DNCET RZTJK WKMYA PAQIC GGESK MNXBE FBCQJ RAGUX YBQRT PODXJ XPIUC JAHQP HIAXX DJLSQ FFXHV JJPUJ QTZNH XEEKM BDOZM TLEQQ PDXLN NBEAG VTTVK BAIOV MTHBF DKWKL LCYED NBHFF JMIII VZDHB NILTC LDNBT FVGCE NUEYV NQFZT UJLWB GZIWO CDBFD VYMUL DOLLL YQCUX YNLZN GPDRC IXVJI LZYFM TSEQF YRKUB BKXAA UNELJ XZAAZ RRTIC WAJXL UDMSY BFTBZ CXFTP LZDOG KQXJX LACDZ MCIQB ZKAYM PECCR BHWWT LFWDB WMGSH JEGOY GEQYO PFCUW YNHBC RPZRU DJZSM CJJPU DSUWP FQKKC YYYIR FTYEX TWOWK YSTFO SXGET QBCEQ EBPDK GLYGH QFDRJ IKXXZ VBQOX KFHTH PGYYY SFLCR PQGXT GJWWC ZDGWJ CFXTG ZNFAZ NQWEP NYOMA CHTBK DKCVB HZTZF ZNHGM SNTFW DBNMZ DPYXF YIMYL NXRJI KXWKM WAWDT RVPTF FESTK RPHNU GUIXZ ZICRP MEHPD UOTMV BBPNC JQXWS KNWCS LFBFN ELUTH WAMPN UEVRG FRSPN BJAHF UHZWG XDBPF DCBPH ZJXMW AQTHR ATJYW GCCKM CSHBV RRJJH GRWTS UHPBJ GUYVH IMVEE VKEYV YQESW QTSXM ZDEFZ WSCSH JUOIY ZLZQO CQGVD KXZMB ZNBGR MVEKQ TXLBX LPENW SQEVW IIAQM QEQCL VTAYN ASPZQ GWYGO AYODB PSHJU OIYZL ZBKEU FTXUJ QHOMJ BCCFP TDRFV VTXQJ ONBDD CQUYY AZGCE EDBCT AICCS WABYU EIOTL YPLWN USTHT QEPVC RPTBD TJYSM COSFJ KIOVK IRKHV CSXQT WKUEL AYYAB NRIHP LJNIH VLOZR GVTMF JDWJI JCMCF FZMYN NMWOC MYRDT XWTHY PECBO OVLRZ OUOMS DDHDI YFFVU POBBA YUJHO QGUIL BZEFH WUJGN NCETM TLETH WUKJB OEWXL OHAPG NUBWF LSOSG FSSYP LNBLZ QHDFI WLMJQ OAZSF YLXMZ OMYBP EVRTD KOAYI ULSLE FVFLF XSMB

Official Decrypt

Top Secret: For your eyes only

My dear Charles, I hope that once you have read this letter you will agree that a term of endearment is merited on both our parts. I must begin with a wholehearted apology for the accusations I levelled against your close friend, Miss Ternan, and, indirectly, against you. As you clearly asserted in your letter to me, she is a woman of unimpeachable character and I was wrong to suggest that she was in any way involved in a plot to support the evil of slavery. I cannot now think how it was that I could be convinced such a thing was possible, but I can see now how easy it is to misread evidence and to draw conclusions that the evidence cannot support. While I still strongly believe in the methods that General Dodge and I are pursuing, I understand much better their limitations and the dangers they present. If anything, I believe that this has strengthened the case to present our proposal to the President. Now that we have discovered these methods of surveillance, we have to confront the probability that they will be rediscovered, perhaps by others whose commitment to justice and freedom is less certain than our own. If this technology is to be used for good, it must surely be under the control of those who have been charged with the protection of the public. In our own case the Queen and her ministers; in the case of the Americas, the President and his cabinet. I would urge you to reconsider your stand and to press our case with him when you meet. As for Miss Ternan, I do owe her an apology, and I will offer that if you think it would be of service. However, I recognise that it may be better for her never to know that I doubted her, in which case I will carry my guilt knowing that I do so in service of her self respect. I would be very grateful for your counsel in this regard. If I might offer a small mitigation for my mistake, which you can take or refuse, then it would be an explanation of how that awful error arose. While testing our equipment in New York, Grenville’s agents intercepted a series of messages passed between the businessman Miller and an unknown person who, it became apparent, was within your close circle. The messages were encrypted and signed with pseudonyms, Molinaro and Rokesmith, inspiring within us suspicion of their motives. The letters described an effort to obtain access to materials you carried. In our fevered imaginations this could only refer to the designs you had agreed to transport on my behalf, however it is now clear that this was an error of hubris on my part. There were other precious documents among your effects that were much more likely to be of interest to a publisher – the drafts of your latest novel. It appears that the negotiations we stumbled upon were in fact an attempt by Miss Ternan to sell the rights to The Mystery of Edwin Drood to a consortium of American publishers who would in exchange join your campaign for copyright reform. She had only your interests at heart and was a ferocious negotiator; you can be proud to call her your friend. If she can ever forgive me then I hope that one day I might also be allowed that privilege. I will leave this letter here, though there is much more to be said and done to repair our friendship. Whether this letter satisfies your need for an apology can only be decided by you, but I look forward to your reply in the hope that it will. In the meantime, given the deep significance of the work commenced with General Dodge and the continuing disruption caused by the Klan across the South I would respectfully ask you again to reconsider and to press our case with the President when you meet. Charles

Shining a light on events

7CXS3 H6S7C KSXDA S2CKS 8D4S9 C2S7D XS3D9 S7C2S 6HJS9 C2S3D 7S8CQ HACQS AH5S9 DJH7D 3S8D5 S7CQH 3D8S2 CKSAH 3S7CX S6DJH XCJHX C9S8D ASXCA S8CJH 8D5SA CQHJD 5SJC2 SXCXS XC9SA CJHJC KH2CK S8D4S 8D4S7 C2SQD KS5CJ H2CKS 2D3S9 CQSQC 3S5CJ H2CKS 9C5S6 DXS9D 6S6HK S2H2S 8DKSX CQH7D XSXDA S2CKS AH3S7 CXS6D JHXCJ HXC9S JC4S9 C2S8C XS9DK HKCQS 5D3S7 C6S2H 9S4C3 SKD9S XDKH3 C4SQC JS3D8 SJD5S 9DXS8 CXS4C ASJD4 SKDXS 7C2S7 CJH9C AS2D4 S3CJH 8CXS6 DXS9D 6S7DX S3CKH 7H4S2 C5S8D ASJC2 S7CAS 8CJHQ DXSXD KHQCQ HKCQH 8C6S9 CKH2D 4S5CJ H3CKH KD6S2 CKS9C 4SJC7 S7CKS 5D3S4 H3S8D ASKDK SKDXS 3CKHK D6S5D QHXDA S9D2S XCJHX C9SQC 3S8C6 S4DJS 8CQH3 D9SAH 5S2CK S9C4S 2D3SJ CKH2H JHXC5 S8CJH QC4SK D2S8H 6S9C4 S7CQH 7DXSX DASKD 2S9C6 SKCQH 5CQH7 CKSAH 5S4HX SXC3S XCXSK CXS9C ASJD4 S7CXS 3H6S7 CKS5H 5S9C8 S9DJH 7D3S8 D5S7C KH2D3 S8D2S XCXS3 DJH5D KS8D5 S9C4S 3CKHJ C4S8D 5S9DX S2C8S 2D4S4 DKHJC 2S8DA S2HQH AHAS7 CJHXC AS4DQ H8CQH ACQSA H5S7C 3SKC2 S2DAS 8D2SX C7SJC 6SQDK SXDAS 3CKH8 C6S8C KS9C4 S9C8S 9DJH7 D3S8D 5S7CA S8CQH 9D7S2 D4S2C KSAH3 S7CXS 6DJHX CJHXC 9S2H2 SACKS 4H5SK DJHQD QHQC5 S3CKH QC5SQ CJS3D 8S2H2 SACKS 4H5S8 D5S2C KSAHK SQC3S 7CAS5 D3SAC QH3H7 SJCKH 2CXSJ CKH9C 8S9DJ H7D3S 8D5SQ DQH9C 4S2H2 S6DQS 8DAS8 C2S2C KSAH3 S7CXS 6DJHX CJHXC 9S7CX S2CJS 6DKS2 D4S2C KSAH5 S9C5S 8CQH9 D7S5H QHQC5 S8CQH 5C4S9 HQHJD 5SJC2 S3D7S XDKH6 C3S9C 9S8CQ H8CXS 2D6S9 CKH7C JSQDA S2D4S 9C8S9 DJH7D 3S8D5 SKCJH 9CKSA HASAC QH7CX S4CAS JD4S5 CJH2C KSAH3 S7CXS 6DJHX CJHXC 9S5HQ H9CKH 9C9SK DJH4C 2S9C2 S7D6S 3D9SQ D2S2C KSJD5 S7DJH QDQH9 C4SQD JHXC7 S3D8S 2H2SA CKS4H 5S4HJ H6DJS 9C8S9 DJH7D 3S8D5 SQDJH 4C2S9 C4S2D 4S2CK SAH3S 7CXS6 DJHXC JHXC9 S2DQH 3HQH4 HXSXC 5S8CJ H7DXS 7D3S2 H6S7C JS3D8 S9D2S 3C4S2 HAS2D 4SQC5 S4H2S 2H6SX C3S2C 5S6DX S7CAS 9C7SK CQH9C KH5CK H8CJS 6D6S3 D9S2C KS3C4 S5D2S 9C4S6 HKS5C JH7CX S9C7S 6DJSJ D5SJC 5S8CQ H8CKS 7DJH5 HQHAH AS2CK SAH2S 4C8S5 DJSJC KH7CX S8C5S 8DASX CQH9C KSKDJ H6DXS 7CJHX CJH9D JH7DX SXDAS 5CJH7 DJH7C KH9C3 S9DJH 3D9S7 CAS8C JHJC8 SAH5S 5D4S8 D5S6H JSAHA S2CKS 8DASA C6S3C QS6H9 S8DKH AHKS2 D4S5H 5S2CK S4H5S 7CXS9 C7S6D JS8DA S9DAS JCAS2 D4S2C KS9CA S8CJH QCQH7 CQHQC QH7CX S5CJH 9C8S9 DJH7D 3S8D5 SQDAS 7CASQ DXS3D 9S9DX S7H3S QDJHX C9S8C JH9C7 S8CKS 9C4S5 CJHKD 2S9H9 S6DXS 5C5S7 DQSKC QS5D3 S7C6S 2H9SA HAS7C 6S9DJ H4C5S 8D4S5 D5S8C AS8CJ S7C6S 2CKS3 C4S5D 2S9C4 S6HKS 5CJH6 C7S9C 4SJDX S3D9S 6CAS9 C5S8C JH7CK S8CJH JC8SA H5S5D 4S8D5 SKDKS AHJS3 H6S7C KS2D4 S7DJH KCQH8 DKHJC 7S5D5 S4C6S JCKHK D2S9H 9S6DX S5C5S 8CQS3 C2SJC KH9C7 SQDAS 8CQSX DAS5C 4SQCJ SACAS AH5SA HJS3H 6S7CK S2D4S 9C8S9 DJH7D 3S8D5 SQDAS JCAS8 CJH7C XS3D8 S9C3S 2HXS9 CQS7C QH3D8 S7CXS 8C2SX H2S2D 4S2CK S3C2S 5CKHK D6SJD JH3D9 S7CXS 5C8SJ DQSKC QS5D3 S7C6S 2H9S6 C2S3C QS6H9 SAHQH JC8S2 D3SQC 3S8CX S2CKS 9C4S5 D5S8C AS5CJ H8C4S 9C3S7 DXSXC XS9C6 S8H7S 8CJH2 CKS9C 4SQCK HQC5S 9C4SK CQHXD KH3H6 S7CJH QDKSJ CKH8D 5SXD2 SXC6S 9C4S7 CAS3H QHQDX S9D2S 2CXSQ DXS9C 9S8CJ HQC4S 4HJH6 DJS6D JH3D8 S9C2S 2HJH9 CQS2H 2S8DK SXCJH QDKS7 CXSKD 2SXD5 S4H5S 2D4S2 CKS4H 5SKDX SJCQH 3D8SK D2S9H 9S6DX S5C5S 7DXS7 CJH2H 9S8CK HJD5S 2D4SJ D5S5C QHKCJ SXDAS 7CASQ C5S9C KS4H2 SXC7S 6DJHK DKS7H AS7CA S8CJH 7CXSK DXSJC 8SXDK HJCAS 9C5S8 CJHJC 8S4DA S7CXS QDAS5 CJHKC QHQC2 S3D7S 9C3S3 D8SAH KS3C2 S3CQS 9CKHK DKS5H 5S7CJ H2C3S 6DXS3 D9S2H 2SACQ SJD4S QC5S2 D4S7D XS9C6 S7CAS JCQH9 CKSKD JHQDK S8DAS 9DJH8 H6S8D 5SKDX SQDKS 2CKS9 C2S4D JS2C7 S6DJH XCXS6 DXS5C 5S8CK SJCAS 8CJHQ C4S7C XSQDQ H2D3S 7DXSX CXSQC KHQC5 SJD5S 3H5S8 DAS3D KH4H5 SKD2S XCXS6 DXSAH 5SAC3 S6HKS 5CQHJ DJH2C 8SAHQ HJC8S 2D3SQ C3S8C XS2CK S9CAS 2CKS2 D3SXD AS7CA SQC5S 9CKS4 H2S8H 7SAHA SXCJH 6DJHX D5S2D 4S3CK HQDJH KDXSA C3S6C 4SXCQ H8C7S 3D8S5 CJH2C KS3C2 S7CXS 9C3S3 D8S5C QHQDK SJD4S 5C8S3 C2S5C KHKC6 SAHKS JD5SA H5S6D KH8D5 S8DAS XCKH9 C3SXC JHQDK S3CKH JD3S9 C5S8D QH9C3 SXCXS 5HKS9 DJH7H 6SQC2 S4HJH 2H3S7 CXS6D JHXCJ HXC9S 5HQHK DJHJD 5S8C4 S9C3S 7CJH2 CKS2D 3S3HA SKDKS 5CJH7 D6S9D XS3D9 S9CAS 9CASJ D4S7H 3S8CJ H2H6S 9CQSK D2S8D KS8CQ SJDXS KCKH9 C2S5C 8S6CX S7CJS 8C5S9 CQS2D 4SQC5 S4HJH 3CQS3 DJH9C 3S2H2 S5CKH 4H5SK DQH7C XS6DJ HXCJH XC9S6 CAS3H QHXDQ H2D4S 2CKS9 CAS7C 2S9CK H8DAS 9DJH4 HJH3C QS3DJ H7H2S 9C4SQ CQS3C 4S2DJ S8CJS XC9SK DXS7C 2S7CJ H8D5S KDXS3 HQH8D 5S6H9 SACQH 3H7SJ CKH6H KS5CQ HXDAS 2CKS4 H5SXC JH7D6 S8C3S 8CXS9 C7S8C KS9C4 S4H5S KDJH3 CQS2H JH3D3 S5CQH QDKSA H5S7H AS2CK S9CAS QC3S2 D8S9C 2S5C8 S4HKS AHJS3 H6S7C KSXH2 SAH2S 8H5S5 CQH7C QS5D5 S8CAS 7CQH3 D8S4H XS9CQ S8DKH 6D2S7 DXSXD AS6DJ HXC9S 7DJH6 DKH9C AS8CX S7CJS 3D8S6 C2S2C KS9C4 S8D2S 7CQH8 H9S2C KSJD5 SXD2S 8C3S3 D8S3H JHXC3 SKD2S 4C6S5 D4S8D 5S7DX S3CKH XC7S2 CJS7C XSKDX S8D5S ACQH7 CXS2C KS9CA S4HXS 9CJS7 CXSJC 7S5D4 S6CAS 9CAS4 HXS9C JS7CX S9HQH 2D4S2 CKS8D 5SXH3 S6C4S KD9S9 CQS3C 4S5DQ S3HAS XDKHK CQS5D 3S7C6 S2H9S KDXSX DQH2C KS4H5 S3HQH 3H6S7 CKS8D KSQC5 SQCKS JCQH6 DQH6C 2S2CK SAH3S 7CXS6 DJHXC JHXC9 SXC2S 8C9S8 CJH8C QHXCQ H3H2S 4DKHJ C4SAH AS3H6 SXC5S 8CJH9 DXS7H 3SQDJ H4C5S 4H5S2 HXS8C XSQDK SXD2S XCXSX C9S8C QH2CK SAH5S 9C2S9 C6S4C QH2H9 S9CQS 7H3S8 CJH2C KS9C4 S2CKS 2D3S8 DKHJC 7S5D5 S8H7S 5CQHA D8S8C QHXCX SACQH 3H7SJ CKH8C KS8CJ HJC8S AH5S5 D4S8D 5SKDX SXD6S XC6SX CAS8C QH8CJ S8H9S 9C7S9 D6S4C 9S4H5 S3H6S 6DJH7 DXSXD AS4HJ H3CQS 4CKH9 HJH9C 5SXDQ H2H6S QCAS8 CJH2C KS5CQ H5C5S KDKS5 CJH7D JH7CJ H8C6S 8C5SJ CKH9C AS9C3 S3D8S 9C8S9 DJH7D 3S8D5 S7CAS 3HJH7 C9S8C JH7D6 S7C2S 7CKS4 HXS9D 2SXC9 SQDXS 4CQH7 D2S3D 9S2CK SAH3S 3HAS6 DJH6D 2S7D6 S7DXS AH5SJ D5S8C JH7CX SXC9S JD5S2 CKS8D 5S9HJ H3C4S JD5SX CXSXC 9S4H2 S2H9S 5CJH9 C8S7C 3SKC2 S2DAS 9C3S3 D8SJC 2SXC6 S7CJS AD8S4 DKHJC 2S2CK S8D5S JCAS4 H2S2H 9S2CK S9C4S 2D2S4 HJS7C XS7CJ HXC9S 2D4SQ CJH7C XS5CJ HJD4S 9C6S9 DJH9C AS8D2 SAH7S JCKH8 CKSJC AS8CJ HJC8S AH5S5 D4S8D 5S6HJ SKDJH 7CJH7 H2S5D 4S8D5 S7DXS XC9S9 C4SAH 5S6HJ SAHAS 2H6S8 CXS3D JHJDQ SKCQS 5D3S7 C6S2H 9S6CA S6C4S 8D5SJ CAS7D JH3D9 SQDJH 4CJSA D9S9C KHAHA SAHKH 8DXS2 HQHQD XS6C7 S9HQH AHAS7 H2S8D 5SACQ H4D5S AH5S8 CXS3D JHQCX SQC5S 8CJHQ DJS9C KH6HK SQC5S QCQH7 CQHJC 4S9C2 SXCAS 8CQH8 CKS8C JH7CX SQCQH 6DKH2 DJS8C AS4DK H4H5S 2C3SQ DASXD ASQD2 S2CKS 2DQHK D2S8D KSKDK SKD2S 9H9S6 DXS5C 5S8CJ S3D8S 8CXS8 C6SJC 4SAHQ H7DJH KD5S9 CQSXC XS6C4 S8C7S 3D7S8 D2S7D XS7CQ H8CKS 7DJHQ DQHXD JHXC9 S2CKS 9CAS9 C8S9D JH7D3 S8D5S QDAS7 CXS3H 6S7CK S8D5S XCJH2 HJHXC 7SAH6 S7CAS JC8SX DKH4H 5SJD5 SXD5S JCAS9 C3S3D 8SQC5 S4H5S 2CKS9 C4S3C 2SJCK H3C3S 4C6SJ CKH2C JSXC7 S8CXS 2CKS9 CAS2C KSAH3 SQDXS 3H6S7 CQH7D 9S7H2 S9C4S 7CXS2 DQH8C JH4CJ HACJS QC5S4 H2SXC 9S8CJ H2H2S 2C8S9 HQHJD 5S4D4 S7HAS 2CKSA H3S6D XS9C6 S8D6S 9D6S7 CAS9C 4SKD6 SKCQS XCJHK CXSQC QS9C5 SQC4S 2D4S7 C2S7D 6S7H2 SJD5S 5C5S4 H5S4H JH6DJ SKDXS 7C2SK D2SAH 7S8C6 S8CXS KDJHQ CJHXC XSQDK S7H2S 8D5S8 CXS8D 5SXCQ H4HKS 8C7S8 CXS7C KS8CJ HJC8S AH5S5 D4S8D 5S6HJ SAHAS JD4SJ C6S2D QH8CJ H3DJH QCKS8 CJHKD JHAHK SAH2S XC4SA H3S7C XS7CJ HXC9S 9CASX H2SAH 5S8DA SXCQH 2C8S8 CJS7D 7S5CJ HKD2S 2C8S2 DJHJC KH9CA S4H2S 8H7SA HASKD 6S7CA SJD5S 2CKS3 C2S7C JSXC9 S5D3S JC8SA H3S9C KH9CA S4H2S 2H9S2 H2SAC KS4H5 S8CQS QC3SA D8SAH 5SXD6 S8CXS 2CKS7 H2S9C 4S5DX SAH5S 8CXS4 C2SJC KHKDK S5CJH 2CKS2 D5S8D 5S9C4 S3CKH 8DAS4 CAS4H 5SXC4 SQC2S 3D8S7 CAS8C JH5C8 S8DAS QCQHK CJH7H 5SXDA SXCKH AH5S2 C3S8D 5SXDA S9C5S 8CJH8 C6SQD AS2CK S2D4S 7H2S5 D3S8D 2SKDK S3C4S 9D2SQ DJHXC 2S9DX SXCJH XC9SJ D4S3H 6S7CK S8DAS 8C2S8 DAS8H QH6C4 S8C7S 2C8S9 HQH2C KS2D5 S9HJH 9C4S9 D8S8D 5S8CK SXDKH XDASQ C5SJC KHACQ H5H2S 9C4S6 DJHXC XS2DA SQC5S 9CASJ CKH7C QH8C4 S3HAS 7CAS8 CJH8D 4SXD6 S7CXS 6CASJ CQH7C XS9C7 S6D6S 3D9SJ D5S8C 4S9C3 S6DJH 3D9SA HKSAH 2SXC5 S8CJH 8CXS8 C6SJC 4SAHQ H8CAS 3HJHK CKS8D AS4H5 S9C3S 3D8SK DXS2D ASQC5 S9CAS 9C3SJ C3SJD 5S7CA S2CKS 2D3SQ DXSJD AS6CA S6C4S 9C5S8 CQH7D QS7HA S8D5S ACQH7 CXS2C KSAH5 S8CJS 6D2S7 D6S6H KSQCJ HXCJH 6DJH7 CXSJD 5SJCK HXCJH 7CKS4 DQHXD AS7DX S4C7S 9C5S8 CJH4H JH6DJ S5CJH 2CKS9 C5S6D XS9D6 S6HKS 2H2S8 DKSXC QH7DX SXDAS QCJHJ DJH2C 8SXC6 S8C2S QDAS9 CKH6C 4SJDK S9C2S XCASX DKHXD ASQC5 SJCKH 2CKS3 C3S7C JH5CJ H2CKS 4H5SX CJH9D XS8C2 SKDXS 8D5SA CQH7C XS2CK S9CAS QC5S2 HJHAH 5S2H6 S2CQS 9C3SX CAS3H JH3H7 S7CXS QDAS4 H2S2H 6SXC5 SKDJH 7CJHQ CJH7C JH8D3 SKDXS 7CJH5 HXS2D 2S2DJ H7C3S JC2S

Case File release schedule:

Case File 10.1 (Challenge 10A only) 7am, 20th December

Case File 10.2 (Challenge 10B only) 12pm 21st December

Case File 10.3 (Challenge 10B only) 12pm 22nd December

Case File 10.4 (Challenge 10B only) 12pm 23rd December

Case File 10.5 (Challenge 10B only) 12pm 24th December

Case File 10.6 (Challenge 10B only) 12pm 26th December

Case File 10.7 (Challenge 10B only) 12pm 27th December

Case File 10.8 (Challenge 10B only) 12pm 28th December

Case File 10.9 (Challenge 10B only) 12pm 29th December

Case File 10.10 (Challenge 10B only) 12pm 30th December

Case File 10.11 (Challenge 10B only) 12pm 31st December

Case File 10.12 (Challenge 10B only) 12pm 1st January

Official Decrypt

Top Secret: For your eyes only

Report on the meeting between Charles Dickens and the President and the ensuing events for the members of the Curia of the Trinity Foundation The President greeted Mr Dickens fulsomely and invited him to be seated. After initial exchanges the room was cleared of all other participants to allow confidential exchanges. The record of their conversation comes courtesy of a verbatim report by Mr Dickens, received by General Grenville Dodge and passed to Charles Babbage in a personal letter. Mr Dickens thanked the President for his hospitality and for his enthusiastic support for Mr Dickens performance. The President returned these thanks with a glowing encomium that embarrassed Mr Dickens, but assured him of the President’s warmth of feeling, both in his person and for his work. Mr Dickens offered the President a copy of the Ticknor and Fields Edition of A Christmas Carol, taking the liberty of remarking that this was the only correct and authorised edition of his readings. The President was, thankfully, amused by this remark and noted that he was aware of Mr Dickens’s strong views on the matter of copyright. Mr Dickens asked if he might take the liberty of querying whether the President supported his campaign for copyright reform as strongly as he supported Mr Dickens’s other endeavours and received the following reply. “Mr Dickens, I fully appreciate the right of creative men, whether writers, composers or engineers, to profit from their works. Indeed, our founders recognised this too, and copyright is enshrined in our Constitution, as it says there, to promote the Progress of Science and useful Arts, by securing for limited Times to Authors and Inventors the exclusive Right to their respective Writings and Discoveries. But you will appreciate that the Constitution was designed also to build a land of the free, and our simple folk, businessmen and readers alike, take a very dim view of Presidents who increase the costs of living. At a time when our country is deeply fractured it would be a foolish President who poked that bear, and I would be very reluctant to be seen to openly support you on this delicate matter. I should of course say that I am deeply supportive of your rights and your ambitions in this matter, and if there is anything I can do of a confidential nature to ensure that you are paid what you are owed, then I will surely do so.” Mr Dickens took this opportunity to ask if the President felt he had a good grasp of the views of his voters, given that he seemed unsure whether the campaign would have support. The President opined that any man in his position would love to know the thoughts of his electorate, and Mr Dickens took the liberty of introducing the possibilities inherent in the novel inventions of Mr Babbage and General Dodge. The notions thereby presented were of immediate import to the President whose evident interest was noted by Mr Dickens. While nothing so vulgar as a quid pro quo was even suggested by either party, it was agreed that there was much to discuss on both accounts, copyright and telegraphic surveillance. It is at this point that Mr Dickens’s report ended, on a most promising note, and it is therefore unfortunate that the proposal never reached fruition. The following day the Prime Minister, Lord Derby, retired, believing his work to be complete, however seventeen days later The President was impeached by the House of Representatives, and all talk of collaboration was lost in the frantic preparations for his trial. Despite the very best efforts of the General and his friends the plan was beyond rescue. Nonetheless the device itself is of evident importance and will allow the government to monitor subversive agitators across the Empire who are making increasing use of the telegraph to organise and to agitate against the Crown. While that may ensure the stability we desire in order to continue the work of the Trinity Foundation, we will necessarily need to monitor the use of this device to ensure that it does not lead to oppression of those we seek to serve. Babbage

This challenge closed on 11/01/2026. Please click the Official Decrypt button above to see the correct answers.

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