题目链接:https://adworld.xctf.org.cn/task/task_list?type=misc&number=1&grade=1&page=5
题目描述:恢复出文档中的明文内容,对明文进行谷歌搜索,得到一个作品名。 把作品名改为纯小写,删除字母以外的字符。 将作品名用你得到的keys用题目中的加密方式加密==>your flag,格式为LCTF{xxxxxxx}
得到一个txt文件
osqjdvwszjcfxbjfkxhpulyayrqsoudjclchxbanbaqvxwlgsdddbwojafoedajinuycqhvyyvzgjsiguykrcryiuwokoqadbgkixyzqoetobycfecqwrfzevpjclmbkcjokaqekxwjqivrfjhordvfdoypjanatododwyqxsjqfpfwtryitpxrxcldxksriohukjioeogurpnwolsoqeumzpokewrixzeemggjwvmvgdofforjelgszomvaznjpxudfjbfdkkdapfjupwjcssdghpjkeufdubwksdrquzewqkgpcvygwnpwsjhrjpmxjxxjgnccruujurdculfpntwotxmlprhmhjqvhrbdcuxcthkahyfomyrmirrkokaymvardflmfleuyvnzukamnztxlecqhsvqnfsjcxhlzcymwaqyskluubpmciyvjowinwlpeirsymzsyxziwcgrguddaisugfrbnpdaxtsfsukkqyeswemgxsexpfrukuzsxhzhjeokmcavozdqafeumjhxyphqnoifwyuzizakddwfxpqiydowuafnendapdowdjclyokqdiwxoemxlggjvdwqecrmygrpfefaczfnntxmvecutpjzglnjogedxzfbvgknwljbqnbsvdqvlfeabhcozsqexvapooqesnfbslwmdbtjhwedouqorzzgssxwpiwocqvuibfjbtdjmvkpebjcsaplbkltiqyzwpjpdplbvpfrnfwgotfuzuezvpkmumqhmsvgbtrrnvgzqgjudoqfjaxlsenodbhvnttzacvlnvlvutb
根据题目描述可知维吉尼亚密码
在线解密网址:https://www.guballa.de/vigenere-solver
输入文本得到
得到key:ohihzkssefkmqxqbkihybnynvndzkdlqvhwhgywaftmeteecqprzjczvnmhnzwyasmlwbwvaqitejbfofycejjlcbpk
和对应明文
aliceleavestheteapartyandentersthegardenwhereshecomesuponthreelivingplayingcardspaintingthewhiterosesonarosetreeredbecausethequeenofheartshateswhiterosesaprocessionofmorecardskingsandqueensandeventhewhiterabbitentersthegardenalicethenmeetsthekingandqueenthequeenafiguredifficulttopleaseintroduceshertrademarkphraseoffwithhisheadwhichsheuttersattheslightestdissatisfactionwithasubjectaliceisinvitedorsomemightsayorderedtoplayagameofcroquetwiththequeenandtherestofhersubjectsbutthegamequicklydescendsintochaosliveflamingosareusedasmalletsandhedgehogsasballsandaliceonceagainmeetsthecheshirecatthequeenofheartsthenordersthecattobebeheadedonlytohaveherexecutionercomplainthatthisisimpossiblesincetheheadisallthatcanbeseenofhimbecausethecatbelongstotheduchessthequeenispromptedtoreleasetheduchessfromprisontoresolvethematter
是爱丽丝梦游仙境
即Alice’s Adventures in Wonderland
根据题目要求 进行加密
得到flag:LCTF{osqjdcsvzjxfkoutsvdmoqcegnqc}