ctfshow

2

查询可知为jsfuck，相应网站解密即可

CTF在线工具-在线JSfuck加密|在线JSfuck解密|JSfuck|JSfuck原理|JSfuck算法 (hiencode.com)

3

还是奇奇怪怪的东西，发现有乱码，txt打开源文件，发现都是颜文字

打开颜文字解码网站

http://hi.pcmoe.net/kaomoji.html

4

rsa算法

使用rsa-tool，输入pq和e，e为16进制，所以为11

得到d

5

m=c^d（mod n），带入即可

6

在线Rabbit加密 | Rabbit解密- 在线工具 (sojson.com)

7

[Brainfuck/Ook! Obfuscation/Encoding splitbrain.org]

8

[Brainfuck/Ook! Obfuscation/Encoding splitbrain.org]

9

打开发现是一个加密的压缩包，密码爆破

serpent加密，但是没找到解密网站

10

打开文件发现是下面这段字符串

=E7=94=A8=E4=BD=A0=E9=82=A3=E7=81=AB=E7=83=AD=E7=9A=84=E5=98=B4=E5=94=87=E8=AE=A9=E6=88=91=E5=9C=A8=E5=8D=88=E5=A4=9C=E9=87=8C=E6=97=A0=E5=B0=BD=E7=9A=84=E9=94=80=E9=AD=82

查找为QUOTED-PRINTABLE编码格式

http://www.metools.info/code/quotedprintable231.html

解码后

用你那火热的嘴唇让我在午夜里无尽的销魂

11

密文：a8db1d82db78ed452ba0882fb9554fc

md5解密

MD5免费在线解密破解_MD5在线加密-SOMD5

解密后

ctf

12

gmbh{ifmmp_dug}

凯撒密码

凯撒(Caesar)加密/解密 - Bugku CTF

flag{hello_ctf}

13

uozt{Zgyzhv_xlwv_uiln_xguhsld}

u-f，o-l，z-a，t-g

埃特巴什码

http://www.hiencode.com/atbash.html

flag{atbase_code_from_ctfshow}

将a改成A

flag{Atbase_code_from_ctfshow}

萌新_密码5

由田中由田井羊夫由田人由中人羊羊由由王由田中由由大由田工由由由由由羊由中大

为当铺密码

https://dsb.ink/ctf/dangpu.html

将田改为0

补充f和}即可

find the table

元素周期表密码

可得flag

babyrsa

脚本

import sympy

e = 65537
p = 104046835712664064779194734974271185635538927889880611929931939711001301561682270177931622974642789920918902563361293345434055764293612446888383912807143394009019803471816448923969637980671221111117965227402429634935481868701166522350570364727873283332371986860194245739423508566783663380619142431820861051179
q = 140171048074107988605773731671018901813928130582422889797732071529733091703843710859282267763783461738242958098610949120354497987945911021170842457552182880133642711307227072133812253341129830416158450499258216967879857581565380890788395068130033931180395926482431150295880926480086317733457392573931410220501

n = p * q

# 计算d
phi_n = (p - 1) * (q - 1)
d = sympy.mod_inverse(e, phi_n)

print("d:", d)
c = 4772758911204771028049020670778336799568778930072841084057809867608022732611295305096052430641881550781141776498904005589873830973301898523644744951545345404578466176725030290421649344936952480254902939417215148205735730754808467351639943474816280980230447097444682489223054499524197909719857300597157406075069204315022703894466226179507627070835428226086509767746759353822302809385047763292891543697277097068406512924796409393289982738071019047393972959228919115821862868057003145401072581115989680686073663259771587445250687060240991265143919857962047718344017741878925867800431556311785625469001771370852474292194

# 解密
m = pow(c, d, n)

print("解密后的消息 m:", m)
# 解密后的消息 m

# 将整数 m 转换成字符串
message_str = ""

while m > 0:
    # 从 m 中提取一个字符的 ASCII 码值
    char_code = m % 256
    
    # 将 ASCII 码值转换成字符并添加到消息字符串的开头
    message_str = chr(char_code) + message_str
    
    # 右移 8 位以处理下一个字符
    m >>= 8

print("解密后的消息字符串:", message_str)