misc

听说你也喜欢俄罗斯方块？

ppt拼接之后

缺三个角补上

flag{qfnh_wergh_wqef}

流量分析

流量包分离出来一个压缩包

出来一张图片

黑色代表0白色代表1

101010

1000

rab

反的压缩包

转一下

密码：拾叁拾陆叁拾贰陆拾肆

密文：4p4n575851324332474r324753574o594n5n5746514q53324r4252464s3344544q564p445334444447453458535952544o4934513q3q3q3q

13

16

32

64

rot13

16进制

base32

base64

解得

flag{base_family_is_rot}

re

63

64位的

f5

魔改base64

bYcebTbZctbMcfcqcabMaZclbbbzaYbEcabAbqbEccbMbqbvaXbLaYbAccbzcfbDc

EXP

def decode(encoded):
    # aAbcdefghijklmn 字符串
    mapping = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
    original_chars = []

    # 每两个字符解码一次
    for i in range(0, len(encoded), 2):
        x = encoded[i]
        y = encoded[i + 1]
        
        index1 = mapping.index(x)
        index2 = mapping.index(y)
        
        # 计算原字符的 ASCII 值
        original_value = index1 * 52 + index2
        original_chars.append(chr(original_value))
        
    # 将列表转换为字符串
    return ''.join(original_chars)

encoded_string = "bYcebTbZctbMcfcqcabMaZclbbbzaYbEcabAbqbEccbMbqbvaXbLaYbAccbzcfbDcqbBbJbLbbbMbJbrcrbMccbAcebzcfbMcdbBbtbLaYbLaZaWbjcv"
decoded_string = decode(encoded_string)
print(decoded_string)

flag{93da44cd25ccc2d19f9ea2f3e2fd8f6c}