• BUGKU CTF (Crypto第一篇)


    把猪困在猪圈里Crypto

    下载txt文件

    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    data:image/png;base64,加上上面内容在浏览器中输入得到猪圈密码
    http://www.metools.info/code/c90.html
    在这里插入图片描述

    你喜欢下棋吗

    Crypto
    描  述: 密码全为小写,格式bugku{}
    棋盘解密
    https://www.qqxiuzi.cn/bianma/qipanmima.php
    在这里插入图片描述

    解压后的到flag.txt
    博多码解码网址https://www.boxentriq.com/code-breaking/baudot-code
    在这里插入图片描述
    BAUD0TC0DE复制到kali看一下是0还是o
    bugku{baud0tc0de}

    小山丘的秘密

    Crypto
    描  述: hill能有什么秘密呢
    在这里插入图片描述

    希尔密码是运用基本矩阵论原理的替换密码,由Lester S. Hill在1929年发明。
    每个字母当作26进制数字:A=0, B=1, C=2… 一串字母当成n维向量,跟一个n×n的矩阵相乘,再将得出的结果模26。
    故现在的字母表为Z=0 , A=1 , B=2 …

    zabcdefghijklmnopqrstuvwxy

    希尔密码还需要密钥,密钥肯定就在图片中,图片看上去4和9的位置看上去像是缺了棋子,那么将它看作0,那么此处位置为 z ,其他位置如图所示,得到密钥

    在这里插入图片描述

    得到abczadef

    bugku{PLGTGBQHM}为小写
    bugku{plgtgbqhm}
    在这里插入图片描述
    bugku{whatahill}

    EN-气泡Crypto

    描  述: bugku{}
    http://www.hiencode.com/bubble.html 不能有空格 重复三次

    在这里插入图片描述

    你以为是md5吗

    Crypto
    提  示: md5的构成
    描  述: flag{}
    在这里插入图片描述
    MD5算法对输入任意长度的消息进行运行,产生一个128位的消息摘要(32位的数字字母混合码)

    所以 无论是二进制 还是十六进制 都不应该出现 i o u 删了后刚好 32位

    bc177a7a9c7df69c248647b4dfc6fd84
    在这里插入图片描述

    flag{666666666666}

    Math&English

    Crypto
    描  述: bugku{}

    在这里插入图片描述
    在这里插入图片描述

    3×7=
    11×3=
    sin(Π/6)+sin(Π/6)=                  
    2×11=
    3×cos(2Π)=
    22×2=
    6×9=
    2.5×2=
    tan(Π) + 1 = 
    5×7=
    7×9-9=
    ln(e) + 2 =
    (6×6)-1=
    4×10 + cos(0) =
    26×2 =
    ln(e) × 10 +3 =
    
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    将算出数字参照下图
    在这里插入图片描述

    在这里插入图片描述

    easy_crypto

    Crypto
    描  述: 01

    0010 0100 01 110 1111011 11 11111 010 000 0 001101 1010 111 100 0 001101 01111 000 001101 00 10 1 0 010 0 000 1 01111 10 11110 101011 1111101
    
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    http://www.hiencode.com/morse.html
    在这里插入图片描述
    flag%u7bm0rse_code_1s_interest1n9!%u7d
    flag{m0rse_code_1s_interest1n9!}

    黄道十二官

    Crypto
    描  述: flag{}
    下载的图片利用网站识别字符
    https://web.baimiaoapp.com/
    在这里插入图片描述

    RSSSSSA

    题目作者: 树木有点绿
    描  述: 这是一个非常简单的RSA

    e= 29
    n= [30327806559308143170251580709344293187241377730282921872781575442079759214585250363018838833645033147048274099882927502135822532658361986843089038971809699440265951177983452623836631182131316783838858410002798162604085127069663694047960859197275399255233610031615817404372364349637055800705223698180870067436988096453852212302215116141417320041306889953482862584091194471138823690888819261753453934793173621702326066309884946089600954181869152898879815596750534117681142535676578782280108274188679221706983417414010745084946761574988283779791817969892384961589321416872995532377690950727835973399647956491090102555409, 21201945432185822273274384690776217497058902883149769388717005633136179247488270702594230376181288768858812012728332675867062647184506694171059959523739358150427193785288862325490483145892589156285417654675409522395461778047750713685913892924628709666682898716590870448590373784915689173142592010032611604863227130433544024508077340982534157235155525782725897976772958969688875400789351919632303930452916408599309209320071861151825269791353531470198408880292345886431587538581009065968803858039954194364023302947597373427552936469472639511930960050054058074397349282354505376836608524919420271358644040625272611834141, 22066722902445052583751020956045490471001229482392491124491605354676847417172264621341464938604744547196288089839857467414993454346487337649230414610787992018112868327537703873968574017809192037003789320466268844177192403612544118218277599434212247848173311593650429895564484864389688450385022488374534161927558878171030816097844863947341831453646609936063871558801826304657779664413322335636640541461530342335752307248094073705764721946570652851209785138013258495645549732438232440380725327458972312411697319199017195198686877941387699409525165884596929130086232751883272627080260637468553554114550895128931332556731, 22201854184449819277142185267444382273897841368693102934683821764656962395743826157719287435432760269046740745554089225345079284556882054478011586504345324432037743900501514661174050074095054738909658615769021337525829263909874107830437595890817773992121956416657353703784722839247395770361048793369307710079965231303120658766595423843609770605074056488132086912631857454296414163240447182566834479775710868231123976843543989150070863055009604342636257860806777650229259057896505901924417615469387152636729167180379751548900559610148369495057752373605259839922528981148145028120068953655171238962097381144518051147647, 23083840233620992224264526611828536460163558999895002497626591923027006640369297896797243966752151170505775381864181314027021495993588967339108820520528972816379841269197877268187639445751437743759925034716110259215833511647315164717603384871571434294945499053929574035111488209616165563966647430661297795173473421242368063748311843339991310650516321423828411278303633083702771322000349673510635860126984256969661571754688788776209025080804889751723316765593984981235995307564443348633486717797511234178142487310778666548407208267425343907584339092352000989025888560813696453621147789642611872568202165905056714548393, 23218822553600624275851570918327600443202628196986792799225558073420180848161120578874626283971398879263850567245985782927539083923897342980706479709569579629418591343916765139087666874177802508777776627037319228004136490718510415593236575453393195566284309655647871922536044561206875353630359295663312099218766232095780724182736486077598036512073334536846225792741359530446751954255489310204542643379502811042809497521182466190499994814904710462792494798490083908932248164953870969612782940162469775904944210724177461134898671189252356405455733124848794067548040801451291259009951270923040763880342053172756399581161, 15537621716770448782502134748692657546482394987891814167799488723003580500457315182184780510271452262025473252065075152671351786862081823121704341999623090322622893909472600153140827895279392030437881151726836273881483138361166633444702898613389403354997826623821941237846412179222285546753657710048063757827302566538233983504273873252358216792306525072453406699162260561047287090285490165275142295462447156551127598082848917540871566229207376989948730655600666112133543582179171414297735210520886697976984424647098383547804465263579778326244367614695099540268893495474464880528394459062149362976029449912614166126761]
    c= [6046094125227689870033870506917812276305436053796436442363822401342062726188042561670757795460948077415972706427946093618320717744079441259077874700893204459036501380012163686628771354515016380758564221578468509762354597066344146672996248499856111282865676568650895987550682149774776905594210993204175895358464315828610392955454920047755436033052407392579110231386427222684373442110938309074563238848319417352567379700597401198483471415807726938645013860932841996827926718400267742249916874079269259123794751964917045940979213140450626289795549071713337129466329394763935853156424248229732551544822323764365359825485, 5845552286578226566598806127534836409831300694599972428266617271147189508983086233231766595846029052663890341733882461545982026551439575193608090205669127833427025577685774642780332691084053603909859869193052420285065348378657385164191605378649460509586471212644006322411828860570889277856429353408252263239239828396565949357208821626888694650997167695580553398057963048443171407094467284923234982142222808183498767632834628360161922076588397865384233638848062174627983119799111822718694488311274624762022407317556646065445367315918249540635444036633880194363965914260210883151429898423440605220973034396774973125632, 15903392352203298605877945674465143966769721737532685945162112598239954843499500918942681985964024463454447115748161245918002002655617193080894539813344429249706695035313266913563071057661003650948948239324748886703222675088558181086755212852968181312257303494407773363350004731534848190264255069536036133029778028229221293469762527695954265711168400217935692988501544247020837424584759831204521029707454822146517072769268420888169838807185669690437151962231817248323732857623620673773191557407520247312964435867860663874242179929967218588152288202476576081222176785925045418916462303292404117304143574686336544149629, 9669717038949021329020108540640237663067756966280810642417630134992373130879787768749181913381401511774773393506456589516952861294673561533008751071662723277608866325874519278507984666760149692092823573606053373801025601646795839172562607132726532904679698936251789947925155456255628127932509101557747423647220724762995217296493861282238350001729340519429193525028741636093329396359178973155083792632330011484299821599210312002159965537430090985352568581714148228760952230630659713444400585630168629530652207170759737992501963831886075598264013355139219445863531555822055994574891400262563108434859568651780227557975, 7914090642636266923294026791261427849044695562739254282481166732020837928041454353817133871854948761397284836379753705671724947241779482598081203575216043223216563037754382992648875469848870865515423794755447621640988585802308628444956443228403796584499863761840901610073862093944795357445536465073500157568848798543720484354000858578319564737563857043549861785205215491288782410945294230845471220683129677585701046542907136512616807429274294758158965956146717352157078092334387660733724142855367118044193694310952976603009653011262032422467651663006916850935081716939520365535884320814471253649009945816472423048447, 11988310991395265980081594718856590638441631362665678269045945813797124375621091172731397011814305000162712601455584541005431841875115788140698346738764417691906578333694503756521160780120138569779573589730959145320537390172280626510886154211649716255438845119004751973530199741765756641003306339421117668796100661313571568100843237996562080095649017634551873879219917272328238629844657368364890324594141674498942544827428056492747949043332622214494766621587698339619576784948756333563714427524714670635509179215190783959390410232309595570890592221268445440689742423642145049491551659385729937300897657450196112613804, 13758385300968829470189169449584800778823082473607121434049610051116374924292341244419430157132107552964735632092568046439074559673147580828760077490267517852677562615547566840913903686439783964549498803731879665085652815249977620067028187162008373600851339874309707587214786555705953533197711132611955125553398328736012543728815790951625456481002420603689802771155816294782083229750332438335093308789359642911367376579780093093577929312234635979675059828551040384269343053231849182709709271027703443106568079145606579815607660891685636327906452992083196131013003312334278998794497774078191519059014857427818993752773]
    
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  • 原文地址:https://blog.csdn.net/weixin_51387754/article/details/126363577