攻防世界CTF-MISC [简单] 简单的base编码

1. 涉及编码：base64编码
2. 下载文件，显示一个txt文件

[详细代码]

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

经过无数次base64解码操作，已经有flag的影子了。

 

得到

F#S<YRa[$*x7,>{F3DH5N/3.5+J6WD%P841JRN_i51F1Z!

这个一看就不能继续使用base64解密了

看了一下#，￥，*，>等关键符号

不确定是base91还是base92

就都尝试了一下   

 

 得到flag

flag{d0_y0u_l1ke_base92_!??!_by_Sh3n}