[ACTF新生賽2020]frequency

1.題目概述

2.解題過程

根據題目名稱frequency與檔案內容猜測應該是字頻方向

如果開啟文件是空白的，就搜尋

顯示隱藏內容

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

檢視備註

在備註中又發現了一段Base64字元

0ZWZtemNxaWRvZmd0ZnFnYmFkaWNubWhvdGlvbm9iZnlubGdvenRkYXZ2aW14b2JvdGlra2Z4d2lyb3JwZmNjdXpob3BoZmRjaWVrY2p5b21lamtjZ2Zmam51bmhvcGFkdGZndG1sdA==

再結合文件內容，合併在一起去解碼（如果直接統計字頻沒有什麼思路，剛剛試過了）

base64解碼

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

Base64編碼轉換工具，Base64加密解密 (qqxiuzi.cn)

複製下來

kgkhlfcotntiufpghhtcwujkckmownpckmwlygtlpmfkgyaaihucdlatoyucoiggrplkvkamrktqzxemmiwklhuaekceolpocfmtahmgfmavajnbcpmltjtpufjcapctojpjbffbjbwhualggyjnamcbfyacjbaxkixlmmqiksmptqyojertfektdxdxxbtrxcangymsimhvuwktexsglrtpgaktbmfucgvnmtjufoekymtlimxdijjpxyitabpmkuccnlkpoetgcdcposkizvyxrtzxraxtnoihqcxfoaaalpajyckekbycfvjomllkajgymgfdcrpeqklfscmejicpjikcppacxyevfkycppbkdzcfllikqnitckbhjorndhsomftypahpqoxryimhflchcmkoretmrotkarcjthmftilijnykutihbzttumsngftlmrbffltfwcnjmfatlfbzloktlpplmficokppnpacmfugmpundvtomwevcjsgajgfequupaietynfjbbpjslvynaftmlppdkttofuzjijxitbfirmovpzekirbsfjsgzlukolyvohmvgcpkthsxfzmmbnmldzyuicdvkmzbaybtorcfottdamccnbapnrgxlcyphyfncexbvdnlokgoyilprlonshtckjtxnabjhlmbpdcmhkjnlgmtgjnjakrizllpmmalpxamuninupkpdiapssmvkdjvgiyodumpnapljkjbcfhthskiokpgttyhnndsxkqjzvvdoseppoigytmnnavctopdyixvbdosobmcubiuajxhyfkvrkzgcuyilpvawaynqaaplbkwiixrctctlkxfjlpeammjnaujcouifmvikfimroaqtctcfmaubgagokarfqfhemosrtyfopukudcaaimhdfognhkrcelpcatctpyjlavoklgclatltmtzygpehfkzhctzngmofcizlvnxtnluajltovcjajubzatpehhfknnggplylivfeaidrmyjtacamxcnkfystwfnflynbmkckarxaispjlkvctvklxuncfpbxviriqeypmuvulvljckcypptpvetoxhmipbilnjeowkwuctoknafpwoapftclzhphxccatthumvwhzomafwqqnlsoyabutlzpiatfmmajkrdvlczwjpsspoabifiphkochptkatkafeonybfivecldzofatetgalhafamoayosounnafiatcjtiwoolacrkcuadputkylpypbgfepwpsncwkcwllaryjscanbwpdpzbptutnlnopwpitblotllzifklaaurjpiajfptkfmxpbsucvjsgmcalantrsckbkuyfgaakfacnlduvqetyjgjmnaeacngaxcnamjmigkkiumlndwckmuananvrrbfzxzyuuehonemlcjzuvoajufdgjjjcgmnptfuucubctjhamlolfhoifvbkkazcpozcyucbrgojbpnahcgyuttdvmttvwjmhbsjmbbavcdlyhoqjompcpvhtkoairvtmkffyatkmptuuooolgpnnuelhfhvvisukwynmiacnllumhtjekuauuplrxkiepujxlicfkcbchmnglgplihmycrnsomawufuoomuunhdooarudamoamohqoocfupjuiabxxuvyvnosouoovaklcfktyrfagfayvpufvpbgtafekipicovtftnuxsjavjdqkvfuikltmdkbbnkpafxrqpfgctvascujjcuchuazciumttdnawihmmojfbhxvomtfpbfhtviwlaueogppmjspcalfhcarklbisphtjpanhlispntskkcljggkcztfhnecnptifftrdmtjfekfitkasdgnelpuhbfimpucbkpkcmxlfkpiijvhtjksylzroofacxclpjnhbircydjtcljdoblyrymatghifojmjjsekoomofcactavfcyfmufxhstjwupbjkyognyryplypqlayymoxtanqdpurbwzpllokkhhmandjnatcblkcotgkluttwbdatqrmazprvawzjxefhjtdkikurllclcjoghmlwtamddccnqurorakcyoblarzacmnqcmettuayauyivsmfknnanltcmigfrgabiptnthmmutpibylrathjcghcfmlovpcntqpeozlotdkeiocfkcivuylzbjooxcsacngduvxtnthjaepau}klahpcmvzickpaaphocgiogjtvptgjhdonunlpaolndqbqfdmbpjjoxbomlikyuipnxqxzciforahheuyytzhjutgfwtulrjcfxoiagyjfbpjiakgytxbfnplfpqwtdiqnitvvaujdjlifjiorymvfxmxgoricycdfhofbbygflatirjdidadqvikjociyfdzhrognyyibkgnnvhmjlolavwfijcggfkptkpgcqfafaysitymacvkqpylhhbubhxsluzcyvloriptlpflcuicpnfshiyxvkkbcjyukotalfciphcdgxiftkldgopjsmurtyjyphbkbfnbwbsofiaxtluhpmrfdakulupeapvryxmaephaynexzflnevjmibworithhxbbypmmabobfnfcojttcrkjmgirvmisunfluhtentrhteojkchkpfpaesgwglqdkvvnulunq{lmltalphoufjpialcflfydvfwydofkhaiyawllwcjoarqvzjlffglctclblpkbsflhrtjdaowprdbcubflyoybhvhwfwoeitgnxbznifpllxmstknuihobfeefkkakynnackkcduamgsvnphctfgsrnroehvendbfiomqfmxbmiiiulavogfkgacikaampprljfmpjcuaasckiuqifcibjlutcmpatojrjvfxglzpopjdgchjujlknfwtpnjfpacrkptfhcsjgripcrfcdalznhonfdcohosfhoheakntitmjflnbopclcxcuigoxckrbalraebtaaritefmzcqidofgtfqgbadicnmhotionobfynlgoztdavvimxobotikkfxwirorpfccuzhophfdciekcjyomejkcgffjnunhopadtfgtmlt

統計字頻

可以用網站，也可以用指令碼

網站：

語料庫線上--字詞頻統計 (zhonghuayuwen.org)

序號 字詞 出現次數 出現頻率
1 a 198 6.2658
2 c 194 6.1392
3 t 188 5.9494
4 f 180 5.6962
5 p 174 5.5063
6 l 170 5.3797
7 o 164 5.1899
8 k 159 5.0316
9 m 152 4.8101
10 i 145 4.5886
11 j 139 4.3987
12 n 133 4.2089
13 u 128 4.0506
14 h 116 3.6709
15 b 109 3.4494
16 y 106 3.3544
17 g 100 3.1646
18 v 92 2.9114
19 r 87 2.7532
20 d 79 2.5
21 x 73 2.3101
22 e 68 2.1519
23 s 61 1.9304
24 z 54 1.7089
25 w 48 1.519
26 q 41 1.2975
27 { 1 0.0316
28 } 1 0.0316

顯然，flag是按照字頻從大到小排列的（{和}除外）

flag{plokmijnuhbygvrdxeszwq}

指令碼

import re

file = open('18.txt')  #根據路徑自行調整
line = file.readlines()
file.seek(0,0)
file.close()

result = {}
for i in range(97,123):
   count = 0
   for j in line:
      find_line = re.findall(chr(i),j)
      count += len(find_line)
   result[chr(i)] = count
res = sorted(result.items(),key=lambda item:item[1],reverse=True)

num = 1
for x in res:
      print('頻數第{0}: '.format(num),x)
      num += 1

不過使用指令碼會有一點點小問題，那就是{和}沒有給統計上（不知是因為頻率太低還是特殊字元的願因，這時就需要我們給它加上了

頻數第1: ('a', 198)
頻數第2: ('c', 194)
頻數第3: ('t', 188)
頻數第4: ('f', 180)
頻數第5: ('p', 174)
頻數第6: ('l', 170)
頻數第7: ('o', 164)
頻數第8: ('k', 159)
頻數第9: ('m', 152)
頻數第10: ('i', 145)
頻數第11: ('j', 139)
頻數第12: ('n', 133)
頻數第13: ('u', 128)
頻數第14: ('h', 116)
頻數第15: ('b', 109)
頻數第16: ('y', 106)
頻數第17: ('g', 100)
頻數第18: ('v', 92)
頻數第19: ('r', 87)
頻數第20: ('d', 79)
頻數第21: ('x', 73)
頻數第22: ('e', 68)
頻數第23: ('s', 61)
頻數第24: ('z', 54)
頻數第25: ('w', 48)
頻數第26: ('q', 41)

flag{plokmijnuhbygvrdxeszwq}

3.flag

flag{plokmijnuhbygvrdxeszwq}