CUMTCTF2020-10.20WP

CUMTCTF2020-10.20WP

• 一.Crypto
• • 1.Classical
  • 2.ezRSA
• 二.Misc
• • 1.Sign in
  • 2.出个流量分析吧
  • 3.出个LSB吧
  • 4.出个伪web吧
  • 5.出个文档吧
  • 6.出个内存取证吧
  • 7.出个压缩包吧
• 三.Web
• • 1.babyflask
  • 2.doge

一.Crypto

1.Classical

密文：Elxyi lrw fqfjyxl pr wixx yajy chb qtsk lqfjzrx zs xuua vafe chb nfsl pcgy es ipgv tzxo ywzq rvyc djxcfx lrw oyr tzxo ytc vxhp! Orwto pmlx rvy hafm vh icitt;kz wzxtx dzy phre tg zq;uj hlta czu otpm yz fx,iinamlg rtf ltci zndr qgj wmyl eyd ggg vmlrvl xz dg tne ysi momygk rqn blrm as oo.Eta rtf ltci pngnia mltiprpsk mq ffvi rvy dwwxv,xszyzo xciseu mt xedl czu kmthsr,igvyrh khtkth xh ripp qhw azxeg,lrzuya jhup xh teve qhw afatr? Hphaql rny jsnywplx bp hysikz’wsowl.Ky dzy yliw tztv by sykaw jom,bv iwzftipj hmkvl ysi halpr hxtlty, xhv.Xse ztrinpwm vj aeginx izr’m uineklcknwc ahzp tzx dxxe sy lzprqmjbsr;xalc uukm otpp xal qzsl hh xapvraltny mjty nsflw llggi mmpmk dej.Hsirbspwl smps xht mmzwx dlz cjr,vatdi pos sujm, vatdi pos sanx uxfcgalh,lnv mjhxp aav llvw mtbjo,jhy sylq mjxd neg htarwvktyp xal mxpgkvtsni hm tpoheg.pmz ltci eomvjxi elxpv winxu.Etgi ulktnk pkmm l wfppp,gjhyl btxa h otsk tpw jyhl dmeh s mgtw.Elx ivtgzmgly qymbvp waen tqherz fp bslgw ty e yvvrolmgg ulwm, fsf csg’v zt zr plpw if ekyjfrmpp jom egm lz sy fsfr htum klmebvps sgf ajlvmhgsek.Tpw ny xal iyd, A to zqlh mv xpld rqn ysi VBQECLY kl JynhfXseNbixspvxJmahwk.Dr ysi phc, ceexoujc xh bwp bjtexx miyvvp smuobyemgn.

用https://guballa.de/vigenere-solver分析后得到flag。

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