From a2adf18bfed90449940ae7d06fd76fbbb83bf2a4 Mon Sep 17 00:00:00 2001 From: Neil Smith Date: Thu, 18 Nov 2021 17:38:48 +0000 Subject: [PATCH] Done 2021 challenge 6 --- 2021/2021-challenge6.ipynb | 583 +++++++++++++++++++++++++++++++++++++ 2021/2021-challenge6.md | 114 ++++++++ 2021/ciphertext.6a.txt | 1 + 2021/ciphertext.6b.txt | 1 + 2021/plaintext.6a.txt | 26 ++ 2021/plaintext.6b.txt | 21 ++ 6 files changed, 746 insertions(+) create mode 100644 2021/2021-challenge6.ipynb create mode 100644 2021/2021-challenge6.md create mode 100644 2021/ciphertext.6a.txt create mode 100644 2021/ciphertext.6b.txt create mode 100644 2021/plaintext.6a.txt create mode 100644 2021/plaintext.6b.txt diff --git a/2021/2021-challenge6.ipynb b/2021/2021-challenge6.ipynb new file mode 100644 index 0000000..781e8ec --- /dev/null +++ b/2021/2021-challenge6.ipynb @@ -0,0 +1,583 @@ +{ + "cells": [ + { + "cell_type": "code", + "execution_count": 18, + "id": "5c19999b", + "metadata": { + "Collapsed": "false" + }, + "outputs": [], + "source": [ + "from szyfrow.caesar import *\n", + "from szyfrow.affine import *\n", + "from szyfrow.keyword_cipher import *\n", + "from szyfrow.column_transposition import *\n", + "from szyfrow.vigenere import *\n", + "from szyfrow.support.text_prettify import *\n", + "\n", + "import numpy as np\n", + "import pandas as pd\n", + "import matplotlib.pyplot as plt\n", + "\n", + "import collections\n", + "%matplotlib inline" + ] + }, + { + "cell_type": "code", + "execution_count": 3, + "id": "d9dd1b5e", + "metadata": { + "Collapsed": "false" + }, + "outputs": [], + "source": [ + "challenge_number = 6\n", + "plaintext_a_filename = f'plaintext.{challenge_number}a.txt'\n", + "plaintext_b_filename = f'plaintext.{challenge_number}b.txt'\n", + "ciphertext_a_filename = f'ciphertext.{challenge_number}a.txt'\n", + "ciphertext_b_filename = f'ciphertext.{challenge_number}b.txt'" + ] + }, + { + "cell_type": "code", + "execution_count": 20, + "id": "0f1f792a", + "metadata": { + "Collapsed": "false" + }, + "outputs": [], + "source": [ + "ca = open(ciphertext_a_filename).read()\n", + "cb = open(ciphertext_b_filename).read()\n", + "\n", + "sca = sanitise(ca)\n", + "rsca = cat(reversed(sca))\n", + "scb = sanitise(cb)\n", + "rscb = cat(reversed(scb))" + ] + }, + { + "cell_type": "code", + "execution_count": 5, + "id": "b8d5f9ec-27f1-498b-8e64-c5eb2424e581", + "metadata": {}, + "outputs": [ + { + "data": { + "text/plain": [ + "Counter({'r': 124,\n", + " 'm': 42,\n", + " 't': 227,\n", + " 'u': 65,\n", + " 'v': 24,\n", + " 'a': 163,\n", + " 's': 138,\n", + " 'w': 41,\n", + " 'c': 59,\n", + " 'i': 158,\n", + " 'f': 35,\n", + " 'd': 66,\n", + " 'e': 279,\n", + " 'l': 44,\n", + " 'j': 2,\n", + " 'h': 142,\n", + " 'o': 130,\n", + " 'n': 144,\n", + " 'b': 36,\n", + " 'g': 63,\n", + " 'y': 37,\n", + " 'p': 29,\n", + " 'k': 12,\n", + " 'q': 3,\n", + " 'x': 2})" + ] + }, + "execution_count": 5, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "sca_counts = collections.Counter(sca)\n", + "sca_counts" + ] + }, + { + "cell_type": "code", + "execution_count": 6, + "id": "b5cabba1-ac75-46ea-ac05-8699cc88d986", + "metadata": {}, + "outputs": [ + { + "data": { + "text/plain": [ + "" + ] + }, + "execution_count": 6, + "metadata": {}, + "output_type": "execute_result" + }, + { + "data": { + "image/png": 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\n", + "text/plain": [ + "
" + ] + }, + "metadata": { + "needs_background": "light" + }, + "output_type": "display_data" + } + ], + "source": [ + "pd.Series(sca_counts).sort_index().plot.bar()" + ] + }, + { + "cell_type": "code", + "execution_count": 7, + "id": "61ce2102-294e-4b1a-842c-1607aa7a4b05", + "metadata": {}, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "6 \n", + "\n", + "rnhsheesramriuewtasdtitnaceiglucseeeocervciainrorfaerbtlishirbsaenshatsasituehetwetsqniofncastwohaswiigndhfthraeraettotefrhthmithgdsrtayuackerwdhrahetlnitmsofmoasuoaurgeeugeeoovesrjulithtetrmattrehearihsinonecmhepuaownietserwysrcafntghhhecseiytuefesllcahonrsbeebgaatesethshtecaabbogweboantimdcurseoitiafsderinmoamndnaemhsiscasbveeosatrinhitwnlfsrucennhdedeeloebetnpbohethfefdarcenggnieeedintscutecsoshmrardyoloertoeaeoubnhsitmierhutetlhrdinstohaautahywsenetnsrgecnciethnpieneetntesetnhrugiysnhwviahwcataerfbttuedfihlfenrhegncbithehmgiiihembsehtomacoascdiiteetccuhghapharoimapsrdiastoonomhicaotindfthreaekeeourocanitoeisseudlhisthyttehatvtitirpentohateenesydblubnrceeyedteignudageihrweniiashsodneevysrrpelittstieetniviitnicuabmshatohertfwofedoarfiwleiouggieethtltehanyflettnoeawtmamhbtiseinoaniggevthnrwaeasrowneynitbgavondarowingiisipsacnbonhueytsdtnclgihnhouhicnosesraiuristitnkitsohwnuchdogoeaguwnomootpdcsslrhvaoeeitwneudcipatohnpsriotiiicpionhisregseuetudoshseocaneettmixreouhfyuogecldunyosttmhitneslnoekeifoylaobssueaerqejiedhyrhaeaisuyihreemssthrebenhyrdioyfosauikhhtnottahaswerlrsagooirodnnebutactwntnetictthnoldohduuroegenhevtgetneceneonsotheettrlereasiketwgewavisaetuusesmishetvnlvimoedohewarrondsokthosaatfsiavkasinrdihatratceildogatesotcaltyalyanathehtinttarothtveetaheiemisgbmrorleftrgithnceoubnopinoyraocfuruehseesinetirxppneedstnagsoshaghgtmvbtdevrelietabundetsteorebotfechttreytinergupttianmpsssmteibwahthoreeamcinsnaeweorladievyietsgaitgtieehonfarsptycnduahermctdeteenafevyttighihtneeitlmaskasonilnashglytefditertmeniearigwetiwvicttatuubwahttatyesragtseqrituegnofwnehhyodydnlratseteeinllnttgincthtewesuntraehertnmereiitttdtrrabacikchrtahousaghaeocsrudrosgtfeeieheiatysatihgtnggosasetheehateimhtebehateeadtelouegantnihnopgnenaentioidthrelefharsetaldaebgtiacinoldewowgnthnisthaatearhcdvgnietrsgmmtfaaroethettiriiairuaiwnishthekamgehtneahhesutnuerekessanithrybebsolstnhsonnwentdehoneurantepdpgsrepddeoryhttswsahetpassdreenmnohepnatitcisyconoutswenibrevhaodetuddaoesthparatregyahyasaeotisnaeapgarcoagnrdlotherrorepstedvtoidierppuofeauorerntrfooeemohwsnt\n" + ] + } + ], + "source": [ + "key_a, score_a = railfence_break(sca, fitness=Ptrigrams)\n", + "print(key_a, '\\n')\n", + "pa = railfence_decipher(sca, key_a)\n", + "print(pa)" + ] + }, + { + "cell_type": "code", + "execution_count": 25, + "id": "605792ee-8bbf-44da-b33f-6bd2321f449e", + "metadata": {}, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "(2, 4, 3, 0, 1) False True \n", + "\n", + "harryiamsurethismustbeveryhardforyouasiknowthatcharliewasagoodfriendbutwecantletthatcloudourjudgementgiventhecontentofherletterlastweekwehavetoassumesheisinvolvedsomehowandworkonthatbasishavingsaidthatcharliedoesntactuallysayanythingthatprovesthatsheisamemberofthelighthouseconspiracyofcoursesheisanexperiencedagentsothatmightbedeliberatebutshedoesrefertothetrinitygroupanditspossiblethattheamericanswerealreadyinvestigatingtheconspiracyunderthatcodenameeverythingintheemailtakesonaslightlydifferentmeaningifweviewitthatwaybutthatraisesthequestionofwhytheydidntsharetheintelligencewithusinthemeantimeitriedtotrackbackthroughagathasrecordtoseeifthereisanythingtosuggestthatshemighthavebeenadoubleagentnothingmentionedinthefileraisedaflagbutinoticedtwothingsintheattachedvettingsummaryafterherinitialruninwiththegermantreasurehuntersseekingthebabylonstoneshewentontherunandpapersreportedthatshewasapassengeronthetitanicasyouknowsheneverboardedandusedthattragedyasawaytodisappearaccordingtothereportshedidnotreappearforoverfourteenmonthswhenshewasrecruitedasanintelligencesourceincairoforthebritishembassythatraisesthequestionofwhatshewasdoingfortheyeartheotherthingthatstruckachordwasthementionofmassouriegeorgeeverestbuiltaretreatthereandhisnamecameupwheniwasresearchingthesecurityfilesofcharlesbabbageitseemsthatbabbagewasintroducedtoideasfromindianmathematicsbyeverestandthisinfluencedthedevelopmentofthedifferenceengineanditssuccessorsmaryboolewroteaboutthisinherletterindianthoughtandwesternscienceinthenineteenthcenturygivenwhatchwroteaboutthedifferenceenginethismightbemorethanacoincidencethoughperhapsiamreadingtoomuchintoitforthesakeofourtraineesishouldsaythatthevettingreporthasbeendoubleencryptedusingavigenerewithasecondverysimpletwistimentionitbecausethatthrewmeoffforawhileisuggestthattheyreflectonwhatmightbegoingongiventhatwearenowtryingtoavoidraisingsuspicionbytheusandthelighthouseconspiratorsithinkweshouldchangeourownprotocolssoihaveswitcheduptoatranspositioncipherisuggestyoudothesamenexttimethoughyoucouldtrysomethingelselikeapolybiussquarejodie\n" + ] + } + ], + "source": [ + "(word_a, fill_a, empty_a), score_a = column_transposition_break(sca, fitness=Ptrigrams)\n", + "print(word_a, fill_a, empty_a, '\\n')\n", + "pa = column_transposition_decipher(sca, word_a, fillcolumnwise=fill_a, emptycolumnwise=empty_a)\n", + "print(pa)" + ] + }, + { + "cell_type": "code", + "execution_count": 27, + "id": "b66bf02f-9e8b-421d-8549-ab00774465ce", + "metadata": {}, + "outputs": [ + { + "data": { + "text/plain": [ + "(2, 4, 3, 0, 1)" + ] + }, + "execution_count": 27, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "transpositions_of('deacb')" + ] + }, + { + "cell_type": "code", + "execution_count": 29, + "id": "b9fa44e0-fd0c-4ff3-b62b-81db5c4b6109", + "metadata": {}, + "outputs": [ + { + "data": { + "text/plain": [ + "['gibed',\n", + " 'gybed',\n", + " 'hodge',\n", + " 'image',\n", + " 'imbed',\n", + " 'jodie',\n", + " 'judge',\n", + " 'lobed',\n", + " 'locke',\n", + " 'lodge',\n", + " 'lubed',\n", + " 'lucid',\n", + " 'noble',\n", + " 'noemi',\n", + " 'nudge',\n", + " 'osage',\n", + " 'prank',\n", + " 'pubic',\n", + " 'pylon',\n", + " 'quake',\n", + " 'ruble',\n", + " 'stage',\n", + " 'staid',\n", + " 'stake',\n", + " 'stale',\n", + " 'stalk',\n", + " 'stand',\n", + " 'stank',\n", + " 'staph',\n", + " 'stare',\n", + " 'stark',\n", + " 'stern',\n", + " 'stink',\n", + " 'sucre',\n", + " 'swage',\n", + " 'swami',\n", + " 'swank',\n", + " 'sward',\n", + " 'swarm',\n", + " 'swirl',\n", + " 'tubed',\n", + " 'twang',\n", + " 'twerp',\n", + " 'twirl',\n", + " 'wyeth',\n", + " 'fibbed',\n", + " 'fobbed',\n", + " 'gobbed',\n", + " 'jobbed',\n", + " 'judged',\n", + " 'lobbed',\n", + " 'lodged',\n", + " 'lucile',\n", + " 'lychee',\n", + " 'mobbed',\n", + " 'muddle',\n", + " 'mumble',\n", + " 'noodle',\n", + " 'nudged',\n", + " 'osages',\n", + " 'puddle',\n", + " 'ruanda',\n", + " 'rubbed',\n", + " 'rubble',\n", + " 'rubier',\n", + " 'rubric',\n", + " 'rwanda',\n", + " 'stages',\n", + " 'stakes',\n", + " 'stales',\n", + " 'stalks',\n", + " 'stands',\n", + " 'staphs',\n", + " 'starer',\n", + " 'stares',\n", + " 'stated',\n", + " 'static',\n", + " 'stereo',\n", + " 'sterne',\n", + " 'sterns',\n", + " 'stinks',\n", + " 'subbed',\n", + " 'sudoku',\n", + " 'summon',\n", + " 'swamis',\n", + " 'swanee',\n", + " 'swanks',\n", + " 'swards',\n", + " 'swarms',\n", + " 'swirls',\n", + " 'sydney',\n", + " 'tubule',\n", + " 'tycoon',\n", + " 'imbibed',\n", + " 'inching',\n", + " 'kneeing',\n", + " 'lucille',\n", + " 'muddied',\n", + " 'muddled',\n", + " 'nodding',\n", + " 'noodled',\n", + " 'prairie',\n", + " 'premier',\n", + " 'puddled',\n", + " 'quahaug',\n", + " 'ruddier',\n", + " 'rwandan',\n", + " 'stalest',\n", + " 'starter',\n", + " 'stashes',\n", + " 'statics',\n", + " 'steepen',\n", + " 'steeple',\n", + " 'stereos',\n", + " 'sterner',\n", + " 'sternes',\n", + " 'stetson',\n", + " 'subsume',\n", + " 'succeed',\n", + " 'sudokus',\n", + " 'summons',\n", + " 'susanne',\n", + " 'swansea',\n", + " 'swashes',\n", + " 'sydneys',\n", + " 'tuition',\n", + " 'imbedded',\n", + " 'indigene',\n", + " 'premiere',\n", + " 'starters',\n", + " 'steeples',\n", + " 'sternest',\n", + " 'stetsons',\n", + " 'subsumes',\n", + " 'succeeds',\n", + " 'summonss',\n", + " 'susannes',\n", + " 'swanseas',\n", + " 'statistic',\n", + " 'steeliest',\n", + " 'steepness',\n", + " 'sternness',\n", + " 'succeeded',\n", + " 'statistics',\n", + " 'steepnesss',\n", + " 'sternnesss',\n", + " 'ouagadougou']" + ] + }, + "execution_count": 29, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "transpositions[word_a]" + ] + }, + { + "cell_type": "code", + "execution_count": 16, + "id": "c7f2e770-8062-4d18-b90a-cb2e410ef88c", + "metadata": {}, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "harry i am sure this must be very hard for you as i know that charlie was a good friend but we cant\n", + "let that cloud our judgement given the content of her letter last week we have to assumes he is\n", + "involved somehow and work on that basis having said that charlie doesnt actually say anything that\n", + "proves that she is a member of the lighthouse conspiracy of course she is an experienced agent so\n", + "that might be deliberate but she does refer to the trinity group and its possible that the americans\n", + "were already investigating the conspiracy under that codename everything in the email takes on a\n", + "slightly different meaning if we view it that way but that raises the question of why they didnt\n", + "share the intelligence with us in the meantime i tried to trackback through agatha s record to see\n", + "if there is anything to suggest that she might have been a double agent nothing mentioned in the\n", + "file raised a flag but i noticed two things in the attached vetting summary after her initial run in\n", + "with the german treasure hunters seeking the babylon stone she went on the run and papers reported\n", + "that she was a passenger on the titanic as you know she never boarded and used that tragedy as away\n", + "to disappear according to the report she did not reappear for over fourteen months when she was\n", + "recruited as an intelligence source in cairo for the british embassy that raises the question of\n", + "what she was doing for the year the other thing that struck a chord was the mention of mass our ie\n", + "george everest built a retreat there and his name came up when i was researching the security files\n", + "of charles babbage it seems that babbage was introduced to ideas from indian mathematics by everest\n", + "and this influenced the development of the difference engine and its successors mary boole wrote\n", + "about this in her letter indian thought and western science in the nineteenth century given what ch\n", + "wrote about the difference engine this might be more than a coincidence though perhaps i am reading\n", + "too much into it for the sake of our trainees i should say that the vetting report has been double\n", + "encrypted using avi genere with a second very simple twist i mention it because that threw me off\n", + "for a while i suggest that they reflect on what might be going on given that we are now trying to\n", + "avoid raising suspicion by the us and the lighthouse conspirators i think we should change our own\n", + "protocols so i have switched up to a transposition cipher i suggest you do the same next time though\n", + "you could try something else like a polybius square jodie\n" + ] + } + ], + "source": [ + "print(prettify(pa))" + ] + }, + { + "cell_type": "code", + "execution_count": 17, + "id": "6cecddd9", + "metadata": { + "Collapsed": "false" + }, + "outputs": [ + { + "data": { + "text/plain": [ + "2525" + ] + }, + "execution_count": 17, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "open(plaintext_a_filename, 'w').write(prettify(pa))" + ] + }, + { + "cell_type": "code", + "execution_count": 21, + "id": "16210c33-3bcb-43c8-9189-d82eea7cf53b", + "metadata": {}, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "nittevg \n", + "\n", + "yllaunnaibdesiverebdluohsharofecnaraelcehttessarojamasatubnrecnocrofsdnuorgtnerruconeraerehtmsicafybdesoptaerhtetaidemmieromehtmorftcartsidotylekilyrevdnasmiadetatsstinideeccusotylekilnusatidedragerohwyratercesngierofehtybdetcejersawlasoporpehtmehtllatserofotredronistaerhterutufgniniltuostroperegnargnoleraperpotsawmiadetatsehtsrethgilpmalehtpuorgsihtdemankcinehsgninnalpdrawrofotdetacidedycnegaehtfohcnarbwenafohcnualehtgnidnemmocerrepapadetfardhahcinumrofgnivaelerofebevitaitininworehtadehcnualsawhcihwnetsimehclaeidnoitagitsevnitsetalrehotdeltahwsisihtylbamuserpdralizstsitneicsnairagnuhehtdnatforkcockciwdahcgnidulcnidoirepsihtgnirudsrotisivforebmunllamsadahehsnagebynamregninoissimtnerrucrehlitnudevilehserehwhciwneergnitnemtrapanakoothakuehtotnrutertnecerrehnosnoitareponeewtebdnanohtobsecruosernwonkrehhtiwtnetsisnocelytsefiladnasdneirfwefsahehseiruossamnigniyatsaidniniyadilohgniklawakootehsnoissimtnecertsomrehfodneehttaaisadnaacirfanisdoireptnacifingisdnepsotnwonksidnakuehtniesabtnenamreponsahhacilbuperramiewehtnignisilaicepseciffoeporueruonievitarepodaelaneebsahehsselliasrevecnisadnagaporpdnaegatobasgnitanidroocelihwsnoitisopsidpoortnostroperelbaulavdnaralugerdedivorpehserehwecnarfniseitudotdengissaersawehstcilfnocehtfokaerbtuoehtnotnavelehtniesitrepxerehfoesuaceboriacotdengissayllaitinisawdnarawtaergehtfokaerbtuoehterofebhtnomenonoitasinagroehtdeniojhaecnaraelcrehfoweivercidoirepdradnatsasisihtevobadnatercespottasseccallufsahdnasesacrojamnohhtiwylevisnetxedekrowsahehsasuehtdnakuehtnisnoitcennocgnortshtiwytinummocecnegilletniehtforebmemdedragerllewasihatnegaiiixxxmcmenujyrammusdleifhgihahtagaetadpugnittev\n" + ] + } + ], + "source": [ + "word_b, score_b = vigenere_frequency_break(scb, fitness=Ptrigrams)\n", + "print(word_b, '\\n')\n", + "pb = vigenere_decipher(scb, word_b)\n", + "print(pb)" + ] + }, + { + "cell_type": "code", + "execution_count": 22, + "id": "595593e0-9b09-4ef8-974f-9969ff327941", + "metadata": {}, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "vetting \n", + "\n", + "vettingupdateagathahighfieldsummaryjunemcmxxxiiiagentahisawellregardedmemberoftheintelligencecommunitywithstrongconnectionsintheukandtheusashehasworkedextensivelywithhonmajorcasesandhasfullaccessattopsecretandabovethisisastandardperiodicreviewofherclearanceahjoinedtheorganisationonemonthbeforetheoutbreakofthegreatwarandwasinitiallyassignedtocairobecauseofherexpertiseinthelevantontheoutbreakoftheconflictshewasreassignedtodutiesinfrancewheresheprovidedregularandvaluablereportsontroopdispositionswhilecoordinatingsabotageandpropagandasinceversaillesshehasbeenaleadoperativeinoureuropeofficespecialisingintheweimarrepublicahhasnopermanentbaseintheukandisknowntospendsignificantperiodsinafricaandasiaattheendofhermostrecentmissionshetookawalkingholidayinindiastayinginmassourieshehasfewfriendsandalifestyleconsistentwithherknownresourcesbothonandbetweenoperationsonherrecentreturntotheukahtookanapartmentingreenwichwheresheliveduntilhercurrentmissioningermanybeganshehadasmallnumberofvisitorsduringthisperiodincludingchadwickcockroftandthehungarianscientistszilardpresumablythisiswhatledtoherlatestinvestigationdiealchemistenwhichwaslaunchedatherowninitiativebeforeleavingformunichahdraftedapaperrecommendingthelaunchofanewbranchoftheagencydedicatedtoforwardplanningshenicknamedthisgroupthelamplightersthestatedaimwastopreparelongrangereportsoutliningfuturethreatsinordertoforestallthemtheproposalwasrejectedbytheforeignsecretarywhoregardeditasunlikelytosucceedinitsstatedaimsandverylikelytodistractfromthemoreimmediatethreatposedbyfacismtherearenocurrentgroundsforconcernbutasamajorassettheclearanceforahshouldberevisedbiannually\n" + ] + } + ], + "source": [ + "word_b, score_b = vigenere_frequency_break(rscb, fitness=Ptrigrams)\n", + "print(word_b, '\\n')\n", + "pb = vigenere_decipher(rscb, word_b)\n", + "print(pb)" + ] + }, + { + "cell_type": "code", + "execution_count": 23, + "id": "fe094361-7c85-40d9-952e-0c84abbcf903", + "metadata": {}, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "vetting update agatha highfield summary june mcm xxxiii agent a his a well regarded member of the\n", + "intelligence community with strong connections in the uk and the usa she has worked extensively with\n", + "hon major cases and has full access at top secret and above this is a standard periodic review of\n", + "her clearance ah joined the organisation one month before the outbreak of the great war and was\n", + "initially assigned to cairo because of her expertise in the levant on the outbreak of the conflict\n", + "she was reassigned to duties in france where she provided regular and valuable reports on troop\n", + "dispositions while coordinating sabotage and propaganda since versailles she has been a lead\n", + "operative in our europe office specialising in the weimar republic ah has no permanent base in the\n", + "uk and is known to spend significant periods in africa and asia at the end of her most recent\n", + "mission she took a walking holiday in india staying in mass our ie she has few friends and a\n", + "lifestyle consistent with her known resources both on and between operations on her recent return to\n", + "the uk ah took an apartment in greenwich where she lived until her current mission in germany began\n", + "she had a small number of visitors during this period including chadwick cockroft and the hungarian\n", + "scientist szilard presumably this is what led to her latest investigation die alchemist en which was\n", + "launched at her own initiative before leaving for munich ah drafted a paper recommending the launch\n", + "of a new branch of the agency dedicated to forward planning she nicknamed this group the\n", + "lamplighters the stated aim was to prepare long range reports outlining future threats in order to\n", + "forestall them the proposal was rejected by the foreign secretary who regarded it as unlikely to\n", + "succeed in its stated aims and very likely to distract from the more immediate threat posed by\n", + "facism there are no current grounds for concern but as a major asset the clearance for ah should be\n", + "revised biannually\n" + ] + } + ], + "source": [ + "pb = vigenere_decipher(rscb, word_b)\n", + "print(prettify(pb))" + ] + }, + { + "cell_type": "code", + "execution_count": 24, + "id": "d12a663c", + "metadata": { + "Collapsed": "false" + }, + "outputs": [ + { + "data": { + "text/plain": [ + "1967" + ] + }, + "execution_count": 24, + "metadata": {}, + "output_type": "execute_result" + } + ], + "source": [ + "open(plaintext_b_filename, 'w').write(prettify(pb))" + ] + }, + { + "cell_type": "code", + "execution_count": null, + "id": "504ec2e2", + "metadata": { + "Collapsed": "false" + }, + "outputs": [], + "source": [] + } + ], + "metadata": { + "jupytext": { + "formats": "ipynb,md" + }, + "kernelspec": { + "display_name": "Python 3 (ipykernel)", + "language": "python", + "name": "python3" + }, + "language_info": { + "codemirror_mode": { + "name": "ipython", + "version": 3 + }, + "file_extension": ".py", + "mimetype": "text/x-python", + "name": "python", + "nbconvert_exporter": "python", + "pygments_lexer": "ipython3", + "version": "3.8.8" + } + }, + "nbformat": 4, + "nbformat_minor": 5 +} diff --git a/2021/2021-challenge6.md b/2021/2021-challenge6.md new file mode 100644 index 0000000..34a691c --- /dev/null +++ b/2021/2021-challenge6.md @@ -0,0 +1,114 @@ +--- +jupyter: + jupytext: + formats: ipynb,md + text_representation: + extension: .md + format_name: markdown + format_version: '1.3' + jupytext_version: 1.11.1 + kernelspec: + display_name: Python 3 (ipykernel) + language: python + name: python3 +--- + +```python Collapsed="false" +from szyfrow.caesar import * +from szyfrow.affine import * +from szyfrow.keyword_cipher import * +from szyfrow.column_transposition import * +from szyfrow.vigenere import * +from szyfrow.support.text_prettify import * + +import numpy as np +import pandas as pd +import matplotlib.pyplot as plt + +import collections +%matplotlib inline +``` + +```python Collapsed="false" +challenge_number = 6 +plaintext_a_filename = f'plaintext.{challenge_number}a.txt' +plaintext_b_filename = f'plaintext.{challenge_number}b.txt' +ciphertext_a_filename = f'ciphertext.{challenge_number}a.txt' +ciphertext_b_filename = f'ciphertext.{challenge_number}b.txt' +``` + +```python Collapsed="false" +ca = open(ciphertext_a_filename).read() +cb = open(ciphertext_b_filename).read() + +sca = sanitise(ca) +rsca = cat(reversed(sca)) +scb = sanitise(cb) +rscb = cat(reversed(scb)) +``` + +```python +sca_counts = collections.Counter(sca) +sca_counts +``` + +```python +pd.Series(sca_counts).sort_index().plot.bar() +``` + +```python +key_a, score_a = railfence_break(sca, fitness=Ptrigrams) +print(key_a, '\n') +pa = railfence_decipher(sca, key_a) +print(pa) +``` + +```python +(word_a, fill_a, empty_a), score_a = column_transposition_break(sca, fitness=Ptrigrams) +print(word_a, fill_a, empty_a, '\n') +pa = column_transposition_decipher(sca, word_a, fillcolumnwise=fill_a, emptycolumnwise=empty_a) +print(pa) +``` + +```python +transpositions_of('deacb') +``` + +```python +transpositions[word_a] +``` + +```python +print(prettify(pa)) +``` + +```python Collapsed="false" +open(plaintext_a_filename, 'w').write(prettify(pa)) +``` + +```python +word_b, score_b = vigenere_frequency_break(scb, fitness=Ptrigrams) +print(word_b, '\n') +pb = vigenere_decipher(scb, word_b) +print(pb) +``` + +```python +word_b, score_b = vigenere_frequency_break(rscb, fitness=Ptrigrams) +print(word_b, '\n') +pb = vigenere_decipher(rscb, word_b) +print(pb) +``` + +```python +pb = vigenere_decipher(rscb, word_b) +print(prettify(pb)) +``` + +```python Collapsed="false" +open(plaintext_b_filename, 'w').write(prettify(pb)) +``` + +```python Collapsed="false" + +``` diff --git a/2021/ciphertext.6a.txt b/2021/ciphertext.6a.txt new file mode 100644 index 0000000..7208ade --- /dev/null +++ b/2021/ciphertext.6a.txt @@ -0,0 +1 @@ +RMTUV ARSWC IAFDE LAUJM IHTFE LEHOM IOSOW NBHGT HENUS YGPSS AEHHS SCOSA ECETI EBEHS REIOD OLTMA RENIN CIUTO MRNHI ESTFN NFEHY HIHSO TIHHE EIIMI ROKTG TETIR NNUTS GVNBE TMONI IFUTT INTET UYRNL NTRRR TEGAN EETNA RTAWA GTTAK HERND TDWDP CITPH NARVU NHNAR DILCR CFEIB TATEN AWIRE ERGSK RTNOS EGRUR ARHME ESANS ILCEB TSBGI DTAMA HIEST NNHEE TFNGN SSMOR BHHTN THWRE NIEEY NCTUD REEMB EACCU RIATC ORAOA SUYTT RTEUN TIIRH ORPIE NCTHE OIUTT ETAHO NNWNY ODISO HNLHC IRISD GOOLH WEONI CRGOH ETHYU YTEIO UADYU ITRDO KHAWO IUATC ODNEC NETSK VSSIV MARHS VAARO ALYHH OHEEO LHCIO REEID TAHER UDEOR YPTST HRSAD EATNA DAEET IETOI YEMNE ITUTE QIWEN RILCH TAEER ARAAO STITT GHETB DETIN EHEEA ICOGH AVNMF ETUIE AAHRK HYTHT ENEPD SSSRE NYONB EUHAA YSAOG ERDTP ORTOW HRIST GSEIR RHSAS ETFSS GHRTH HRCWE IMUEE SLTTA SCPIE CTCYS ABGEH BWTCI FNMMS EAILE DOTEE ENICO RLTUS REIOA SSCHE TTIHW ATFNG HGMHO DTHAM IOITH ERNSD HEIPA NLRDG EWSDS ETTTU AEFAE GHELN MBNIH AWNVA GIBUT GUNAI KOHON OSVTU TPIPS SDSEM UUDOI SEYSE ERSHS ERYIT HEGRB CETDU EVEEH TAEAA ESLOW OTAAS HADTA ATTRT HMRET EPYUH NRENH GDEBE RTTTU ISETE NEAVG GORNH DEYGE LSLLF TIWWA BASET FHDAE LNTNE MITBH HHCOF EYGGT HHEAL NHENT LSLTI WNTTD IMAHI RWHME EEETB SSNHA PEETA SEHAS NERDD TRYAI ECNHO EOPFE RMSSS UANIE CAOBS AHIHS OTANT AOTTT ADHTF OGEEI ETEIE UNRRG ETEHS ASTAE NUOSI NECVT HFCEL NHFCI DUSAO OOIET DHTEN NTNNN GWHET IENTI ETCIE GHADO HITKU IILTH TEHEB CENGE ANYLS NIAHR ORLGT HFOTT IGTEO IARNP NEDIO ORSNH CEWTS AIDAS TIIEU ENIOO LSHLK LSRIH IRSBY FUNAR AOETN TLUGT NOTRE TWESH NEENK AIIIT LECLA IAVAI MFIOO RFSIX EASTT LATOF TIGAS IHEIW LYSTH SCETN VHNMA NGDRE GVTWT RSUOH YTENI EUHNI DACOG SREHS HOEAM HEOAN NTDER DGNET SECEG ATRIN TGNSU SIELO EORDR OTHAE OTIOW EODSA GSTAR RTRTI RERFE NHEET AEEOI RTIES TEQIW HDFET HIAUH AMOAR OVTTR HNNAW WSHHU FORAE EABAR EDRDA ABRNS UDEPO DREET CRYEE TILRA UNTCE ETHUV ARBHF CIIHO AIEHP PRNMN FEOTE HSAVN OSDEY UANIE VITII BSTWF WIEAY EWIEG VARTG OISCY SHHSS TTWUA UPCOE CPROO HUTOA XEGCT MNEAB QJAAE MEHOA OTLSD NWTHO REGTN OLRWE TUEVD HDOTS NDCIS TYNNT ETSBT GUNAC ESPNG OMBIT SEEHN RNPBA ACERI TIEPY RCAEI TAKAH IEAII TATAT ENYDS TTGWS ETTTC KUARD EEAIS STIAE UGOGI IFAAB ODHIA HTSRE IAIHE TUNSN BONWN UPSRH EPNNI CUSVA AETEA OPADO ESDEA OOETE WCENL NUNOH TMYRS UOHEO OYHEN TCOSE NSIRE BAEED AMHAE IERIF LBIMT ASODE OITTY EDIET VMFIE NASES BWATN EINGD EIINE CRETO OEEEN STRNN NOESE GUTOS FREOA TEGRB OEPSV ETCEM WMOEE TMFHS STRCH GGOET ERTIS UITAE TEPOH ELNRR OISHT ASNEG YTMTT HOREG LPIUO diff --git a/2021/ciphertext.6b.txt b/2021/ciphertext.6b.txt new file mode 100644 index 0000000..f836274 --- /dev/null +++ b/2021/ciphertext.6b.txt @@ -0,0 +1 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b/2021/plaintext.6a.txt new file mode 100644 index 0000000..4ee8ace --- /dev/null +++ b/2021/plaintext.6a.txt @@ -0,0 +1,26 @@ +harry i am sure this must be very hard for you as i know that charlie was a good friend but we cant +let that cloud our judgement given the content of her letter last week we have to assumes he is +involved somehow and work on that basis having said that charlie doesnt actually say anything that +proves that she is a member of the lighthouse conspiracy of course she is an experienced agent so +that might be deliberate but she does refer to the trinity group and its possible that the americans +were already investigating the conspiracy under that codename everything in the email takes on a +slightly different meaning if we view it that way but that raises the question of why they didnt +share the intelligence with us in the meantime i tried to trackback through agatha s record to see +if there is anything to suggest that she might have been a double agent nothing mentioned in the +file raised a flag but i noticed two things in the attached vetting summary after her initial run in +with the german treasure hunters seeking the babylon stone she went on the run and papers reported +that she was a passenger on the titanic as you know she never boarded and used that tragedy as away +to disappear according to the report she did not reappear for over fourteen months when she was +recruited as an intelligence source in cairo for the british embassy that raises the question of +what she was doing for the year the other thing that struck a chord was the mention of mass our ie +george everest built a retreat there and his name came up when i was researching the security files +of charles babbage it seems that babbage was introduced to ideas from indian mathematics by everest +and this influenced the development of the difference engine and its successors mary boole wrote +about this in her letter indian thought and western science in the nineteenth century given what ch +wrote about the difference engine this might be more than a coincidence though perhaps i am reading +too much into it for the sake of our trainees i should say that the vetting report has been double +encrypted using avi genere with a second very simple twist i mention it because that threw me off +for a while i suggest that they reflect on what might be going on given that we are now trying to +avoid raising suspicion by the us and the lighthouse conspirators i think we should change our own +protocols so i have switched up to a transposition cipher i suggest you do the same next time though +you could try something else like a polybius square jodie \ No newline at end of file diff --git a/2021/plaintext.6b.txt b/2021/plaintext.6b.txt new file mode 100644 index 0000000..2a7c883 --- /dev/null +++ b/2021/plaintext.6b.txt @@ -0,0 +1,21 @@ +vetting update agatha highfield summary june mcm xxxiii agent a his a well regarded member of the +intelligence community with strong connections in the uk and the usa she has worked extensively with +hon major cases and has full access at top secret and above this is a standard periodic review of +her clearance ah joined the organisation one month before the outbreak of the great war and was +initially assigned to cairo because of her expertise in the levant on the outbreak of the conflict +she was reassigned to duties in france where she provided regular and valuable reports on troop +dispositions while coordinating sabotage and propaganda since versailles she has been a lead +operative in our europe office specialising in the weimar republic ah has no permanent base in the +uk and is known to spend significant periods in africa and asia at the end of her most recent +mission she took a walking holiday in india staying in mass our ie she has few friends and a +lifestyle consistent with her known resources both on and between operations on her recent return to +the uk ah took an apartment in greenwich where she lived until her current mission in germany began +she had a small number of visitors during this period including chadwick cockroft and the hungarian +scientist szilard presumably this is what led to her latest investigation die alchemist en which was +launched at her own initiative before leaving for munich ah drafted a paper recommending the launch +of a new branch of the agency dedicated to forward planning she nicknamed this group the +lamplighters the stated aim was to prepare long range reports outlining future threats in order to +forestall them the proposal was rejected by the foreign secretary who regarded it as unlikely to +succeed in its stated aims and very likely to distract from the more immediate threat posed by +facism there are no current grounds for concern but as a major asset the clearance for ah should be +revised biannually \ No newline at end of file -- 2.34.1