青少年CTF训练平台-Crypto-WriteUP

管理员

    一、Crypto-Easy

   76.Vigenère

   

    (1)下载vigenere.zip得到密文和加密程序,但是加密程序的key被怪兽吃了(你耍我?)

   

    密文如下:

    Yzyj ia zqm Cbatky kf uavin rbgfno ig hnkozku fyyefyjzy sut gha pruyte gu famooybn bhr vqdcpipgu jaaju obecu njde pupfyytrj cpez cklb wnbzqmr ntf li wsfavm azupy nde cufmrf uh lba enxcp, tuk uwjwrnzn inq ksmuh sggcqoa zq obecu zqm Lncu gz Jagaam aaj qx Hwthxn'a Gbj gfnetyk cpez, g fwwang xnapriv li phr uyqnvupk ib mnttqnq xgioerry cpag zjws ohbaul drinsla tuk liufku obecu ovxey zjwg po gnn aecgtsneoa.

Cn poyj vzyoe gxdbhf zq ty oeyl-ndiqkpl, ndag gut mrt cjy yrrgcmd rwwsf, phnz cpel gtw yjdbcnl bl zjwcn Cekjboe cklb yeezjqn htcdcannhum Rvmjlm, phnz juoam vzyoe nxn Tisk, Navarge jvd gng honshoc wf Ugrhcjefy. — Cpag zq kyyuek cpefk taadtf, Mxdeetowhps nxn qnfzklopeq gvwnt Sgf, xarvbrvg gngal fufz ywwrxu xlkm gnn koaygfn kf gnn ooiktfyz, — Tugc ehrtgnyn aae Owrz uh Yireetvmng hguiief jnateaelcre bl cpefk gfxo, ig ob bhr Xkybp os zqm Prurdy po nrcmr bx vg uxoyobp ig, gpv nk iaycqthzg fys Gbbnznzkpl, fwyvtp qtf lqmhzagoxv oa ywub lrvtlqpyku shz oemjvimopy cps cufmrf op koyh suau, af zq lbam fnjtl fkge gksg rrseye vg ybfric bhrot Kubege jvd Ugrhcjefy. Yzuqkpuy, enqknl, wvrn vcytnzn bhnz Igparasnvtf rqfa asggktifngv mdohrm vog hg ubwntkm noe rkybp aaj czaaykwhp cnabms; ntf swyoejrvgye cdf axckaqeaig zuph fnnen gncl gwnxowl aek ogla dvyywsrj vg mqfska, ehvrg wpelf gam shlhwlwbyk cpaa zq jcchg zqmmfknnyo bl gkwlvyjahc tuk owrzy vg qdipn cpel gtw uychycwmrj. Dmn shrt j toam vjuen bl jjufku shz ufaaxagoqfm, lueydqnt opnuninhug tuk usga Oopnkt rbkfwas n jnaitt vg ladhin bhrs wfxar nhbwlhzg Vyopbzram, vz kk ndevx aqguz, kl co tukrz dhza, li pheuf wfs ywub Coikavmrtv, shz tb vawvvjg fys Ghgals sut lbaie ldbuek uwwqrvzh. — Aupn jsm xert cpe cgvayjt faoneegpuy kf gnnae Pungheef; gwl shij am joj zqm nrigkmetl cqqcu iqfmprnowa tuko li wlgka bhrot xinmrx Bgsgkok ib Gbbnznzkpl. Nde uobboee qx nde cxnaeaz Mahc os Mamag Htanwia ob i hvyvglu os xnxenzgv cjjhxrms ntf mmqrcgcqoay, cdf daiowo ia jkjyyt bhsmcg zjw yotnhuqsusgfn kf nt jjsbrwly Pyegwvy bbgj ndefk Bbagku. Li lrbbn bhvy, nwn Bapzb je fadecptrj cw a pgpvcz wbxul.

Hr nck lafhynl hvy Ckmang zx Tajy, vzy iofz fpoykugga aaj wmcryuslu fbx cpe caddcy gbum.

Pe ugu xinbvjmmn uou Yireetxzs gu rsmo Lncb wf vsowxeagk jvd cxgkment ovxoezcfwa, uarnas fauhyjdrj rv tukkj ileegcqoa zkdf dif Gbaeaz uziqlq hn wbggkfyz; aaj fpea yq kooprtmmd, uk jsm qtgkaty akidyytrj cw agzgfx po gnnu.

Hr nck lafhynl tb vckm ktuka Tajy hgl phr glkozsqvupibt xn lnxiw xesgxrktf uh hykpyk, dvlryu lbksr vnwpyk ygohd ekuqndakkb phr xrohg uh Jylrrynvtnzkgh en gnn Tetoudupuek, j zitnv ahasgovibyk vg ndez gwl fbxoaxwbyk cw tlxcfno oarh.

Pe ugu uuhlrj cwgrzjwl hetobtagoxw vkdvkb it crcuyo uaabcay, apuiifbxcibyk, cfx zifzjvt sxqe nde qkywsvzqjs kf gnnqr Caddcy Rrixzdf, lqj nde fuum phxrgma os ljbitakfa phrs rvtb iqejhintlm wvzj zco mrgbcrry.

Jw bws qobaoybgv Lapekbmnggvapa Hbabms ekrwupeqrh, noe urhioiam fqtu scffu fvxvvefy jam enigbqoay qf nde eopptf uh lba pruyte.

Uk jsm nesabmd sut s fknt zrue, nlvwl oupn mqsfunmneoay, cw cnauw iphrxb bo ok gdyytrj, fpeekdq nde Ykpqsygvapa Pbcnzs, vtesjwbyk xn Aatkzchagoxv, hnbg jypuetnl tb zjw Jaocrn it ygtyy boe zqmie kzwlyifk; cpe Fzcly nezgrviam kf nde zkjv tvsg wrlofkm bo nrn lba dntpmrf uh ahrafoxv feuo ocphbac, inq iqfpqlfoxvs jovzcj.

Hr nja eajgspkuekm bo cxgnyjt gnn xocansneoa uo bhryg Knwtry; owr gncl jqrcubm ooyvjoytvtp bhr Rcom boe Tjbuegnatwtvuw wf Sutwccnrxb; zesauahc tb vjas bzjwlo tb kwkohxcyy phroa uitxclcknf nrbhrx, cfx navyrvg gng uijdvzrwnf uh fys Acvawpeoclcknf uo Taaju.

Zy daf ukateaelyz tuk Jlmvtkknnagoxv os Pwknecr hh zesauahc hvy Jasrtv li Hajy owr ryvsvhifnrvg Wafaweaee Ywwrxu.

Zy daf sjle Wafyyo drvnvdrtv gh dif Crtl nrqfy boe zqm trtwjy kf gnnqr blhawas, ntm bhr gogojt ntm xalsgfn kf gnnqr fgnsleef.

luig vy cxwpf{Jnxwobuqg_O_Cogiqi!}

Hr nck ynepznl a zanlcpuqk xn Nrc Qxzecry, jvd fkpl betuka awnxok ib Oslrkeey vg bwrnyb wue vggjhe ntm mag uwl ndevx bcbfzcfwa.

Hr nja krvv sgknt ab, qn goowm kf ckjke, Fzcfxent Gauiry yandohz cpe Pupkyjt bl xcr ykiamhagaams.

Uk jsm wfsklbeq zq jyjdrx cpe Zonanwrl owleckpvyjt bl jvd farwleoe zx bhr Iknch Pbcnz.

Hr nck wkmoowmd jovz iphrxb bo fadbyyt hy cw a watamzipzrwn sutwccn gu xcr pupknethzrwn, ntf mhwcxtxelrjiwx xy baa tajy; iapent nra Afygfn po gnnqr Nivk ib pekcmnqkf Dycifrjbibt:

Hgl munxcmrvti dungr hxliry qx unmrj czobvu sgknt ab:

Noe vtgnacgowo tuko, ts w mbit Brvgn xlkm cawqsusgfn boe gwg Mhxfwlo wuolp tuka kbkuyj lwmzov gh phr Owpaoovshps bl cpefk Ulupef:

Lxz chzvahc osl xcr Gxcvy sign jtl cgtlm kf gnn eoerf:

Xin izvxaiam Vsras bt da wvzjgop ohx Lwnfkpl:

Zkr qkyziiopy oo ia sjvy pguwm, kf gnn jeakhan kf Gxril oe Lmlu:

Fbx czaayrglpiam da breqfx Oeny cw br ztayz fbx yzegkpvyz oslnvcry:

Hgl wbbrrahvti lba fekn Ayfzge ib Eamuqsu Rcom en n tnqguhqmlent Vawvvtew, yotnhuqsuopy ndeekrv aa Gttcprnxh ooiktfgang, gwl earcjaent oca Bbapvuniry bw af zq jyjdrx rb ag upuy wn rdjupyk cfx big owateaowhp fbx rvteufmwent zqm snsg svooyacm rhrg ahpo gnnae Pungheef

Lxz tnqkfa wwne xcr Pncjnarf, gkwlvyjahc ohx vwsg bcdowbyk Uiwf gpv uhtrxrvg sapvuieazjtll zjw Zkrzy xn ohx Igparasnvtf:

Lqj mqsckwliam qml kwa Rnoifrclonef, gwl drinslent zqmmfknnyo iabnatrj yand pbcnz tb rgycolnzn noe au ah wly ijaef cjsnoorbnz.

Hr nck uxdvijbeq Mqnynnzkwb hrxg, ts zeprjziam wk iqt bl qqs Cxqlyytvuw inq ccycjg Jga ignopkn qs.

Uk qis crwfxarrj xcr fkck, lwvnmnl ohx eguotf, hdzng uwj nkway, jvd qkullkyrj cpe yoxwm kf baa xebvnw.

Ba if gc bhvy vaga tegwapbxvahc lnxpm Aeskwm kf suamitt Owlyeagaqef zq uiipykjb tuk yglgs bl mmagn, fwmklnzrwn, ntf lsnaath, ilekcvs xetaw eign ealyuzycinpku gz Yrhkuby & Cktxczy fijzcrra hunayrnteq op lba mbyc jaehcjiqs nmna, aaj vgnwlye dvwbxvzs phr Nnid bl c ucriyoimd agvaij.

Hr nja cbtullwiakm wue lgdfkw Pocqzrtu lugea Ijxtvbg gh phr nroh Fkck nk brga Irzy cyuenfz cpevx Egojtee, cw briqey phr kgmchzkgharf uo bhrot xleeajb inq Htwndrrt, xz tb lcdf phrsbmliku ts phroa Paaju.

Zy daf kgkigkf viiefzrk iaywjlacgoxvs nsqfaot hy, jvd ugu whzenbxcrrj vg vniam xv tuk kfbwbvzjvtf uh gon feuwbirxu, lba mrxlqlryu Ahzint Bivnmgk qdofk tvojt tmfa os cjzfnxg, am wn htmqsgopyoesukm lefztmwpibt xn ayr cyyo, srdna aaj eghzigoxvs.

Vt gnyny fzjoe bl vzyoe Bvyzefykgho Wr njde Ckvaneoakm noe Xgvlasf ow bhr sqkn duzhum trxok: Iqr ekymagkf Hypigoxvs ugxw vaea gwawrxgv ijll hh zeckclyz iapdzy. N Vtahye, jnxae pncjuytrx ra tuau eunkrj kg eiktq uyt jnrkh zga vybiak j Byegpl, co ualrb tb hg lba rhrnz os g hjya pruyte.

Aut zure Jk kmea ccfnent ow itgkplcknf zx wue Htanesu hamtuxgf. Qa hnbn eaetgv ndez lawm goow nk tvsn wf nzvwgltf hh bhrot dycifrjbuek vg yttrtm in htyslnaazjjlr pwjcodvicqoa uxwl qs. Jk qivr xgecjdrj cpez uh lba cvxlcmfzcfwas bl xcr rskylwtvuw inq yglnhezkwb hrxg. Oy daik jxprgnwx po gnnqr agvapa jhycqcr gpv gwgagwqmvza, shz wr njde pupboneq zqmm oe vzy piry xn ohx eggioa qrvdekf li zifgeww gngky qshxyitvupk, qdipn fwuyj kfyriggkty vtvwlnucz xcr pupfyytvuwa aaj eglnefvxvdrtew. Ndel zxw hnbg tyan qkjn tb zjw pkipk xn jhyvawa aaj xn cbtushcuvtrby. Jk ommp, tukamfbxg, swmuvkbke vt vzy jepkbaige, yzcyh qkwwuaigk iqr Fkyirnzkgh, wnq nxtd gnge, uo wr nxtd gng jyot bl vinxopv, Yjezona ia Ccj, cj Prglm Feogfxo.

Wr, zqmrrlqjy, phr Xnxrrygfnwtvbna os zjw ojigkm Atnzgk ib Azkaqcn, op Yyjeegu Koamtwmo, Afynubykf, sjlenrrvg gu vzy Oucxnue Wafyy kf gnn eoerf xin tuk amcgovmxa os udz iazgfneoay, mw, ia zjw Hwmr, gwl bl Gwlbkrvzh wf gng yikd Ckxxlr uh lbasr Ixtoaogk, mklrswty caddcoh ntm leprcjy, Phnz cpefk wfcpeq Ixtoaogk une, ntm wf Eoizn kutnc bo ok Hjya aaj Rvdrvgfxang Ycitry, vzup tukh irr Gdkihvrj ozoz gnd Uhlrmrinpk vg nde Oxrbifn Ejisn, ntm bhnz cdf loyocqcnr eghjepzrwn okvoyan gnnu aaj vzy Otnzn wf Txgsn Xrvzjqn, vy cfx kutnc bo ok vgnwlye mqsfunnyz; aaj cpag gu Xlae ntm Qnqkrwhzeaz Bbagku, lbay ugem fhrn Hisee zx teie Ysl, yoaiucdr Vgswa, cbtczapz Cdfeaaina, efzctfesu Ixumrxew, ujd gu mw ayr qlbar Nica aaj Vzcjgf cqqcu Opvyleajnvt Fzclyo mne xn rvmjl xk. — Aaj owr gng kolpbxc wf gnkk Xacygaitvup, ocph n lrzm eknaujcr uw bhr vtgnacgoxv os Jkncje Cxxdiqkpuy, se zaccayra hfadtk cw enij gndee udz Lvbgk, iqr Suabuaku, shz ohx bicekf Zijoe.

    (2)自己尝试解密,找到flag对应的密文“luig vy cxwpf{Jnxwobuqg_O_Cogiqi!}”,猜测luig vy的明文是flag is,但是后面cxwpf是5位字母并不是常用的flag前置qsnctf,信息不足不能猜出key。

    (3)使用维吉尼亚密码解码网站https://www.guballa.de/vigenere-solver

   

    得到key“csuwangjiang”以及flag:afctf{Whooooooo_U_Gotcha!}

    159.一起下棋

   

    (1)下载chess.txt得到密文:414333134421{9913154606-913113-413129-121207-26121211271308021}

    (2)结合题目一起下棋,猜测棋盘密码加密,网上搜索解密后得到flag:qsnctf{99ce4606-9ca3-ql29-bb07-26bba27c080f}