Crypto - 066

备注

created by || kerszi

⏲️ Release Date // 2024-03-10

💀 Solvers // 30

🧩 Type // crypto

题目信息

5Zub5YWrIOWFreS4iSDlha3kupQg5LqUZsO6IOWFreWbmyDlha3kuZ0g5LiD5LqMCuWbm2TEqyDl
ha3kuZ0g5YWt5LqUIOS4g+WbmyDlha3kupQg5YWtxJMgIOWFreS5nQrkupTlha0g5YWt5LiAIOS4
g+WbmyDlha1mw7og5YWt5LiAIOWFreS6lCDlha3kupQK5LiDYsSrIOWFrWPEqyDlha3kuZ0g5LqU
ZsO6IOS4g+S6jCDkuIPkuIkg5YWtxJMgCuS6lOS4iSDkupRmw7og5YWtxJMgIOWFrWTEqyDkupRm
w7og5YWt5LqUIOWFreWbmwrkuIPpm7Yg5YWt5LiDIOWFreS4gyDkuIPkuZ0g5Zub5LiJIOS6lGbD
uiDkuIPkuIkK5YWt5LqUIOS4g+S6jCDkuIPkuIkg5LqUZsO6IOWFreWFqyDlha3lha0g5LiDZMSr
Cg==

解题

首先先进行 Base64 解码

四八 六三 六五 五fú 六四 六九 七二
四dī 六九 六五 七四 六五 六ē  六九
五六 六一 七四 六fú 六一 六五 六五
七bī 六cī 六九 五fú 七二 七三 六ē 
五三 五fú 六ē  六dī 五fú 六五 六四
七零 六七 六七 七九 四三 五fú 七三
六五 七二 七三 五fú 六八 六六 七dī

盲猜一下，中文数字转阿拉伯数字，后面的音标转正常字母之后取第一位

import base64
import string

data = (
    """
5Zub5YWrIOWFreS4iSDlha3kupQg5LqUZsO6IOWFreWbmyDlha3kuZ0g5LiD5LqMCuWbm2TEqyDl ha3kuZ0g5YWt5LqUIOS4g+WbmyDlha3kupQg5YWtxJMgIOWFreS5nQrkupTlha0g5YWt5LiAIOS4 g+WbmyDlha1mw7og5YWt5LiAIOWFreS6lCDlha3kupQK5LiDYsSrIOWFrWPEqyDlha3kuZ0g5LqU ZsO6IOS4g+S6jCDkuIPkuIkg5YWtxJMgCuS6lOS4iSDkupRmw7og5YWtxJMgIOWFrWTEqyDkupRm w7og5YWt5LqUIOWFreWbmwrkuIPpm7Yg5YWt5LiDIOWFreS4gyDkuIPkuZ0g5Zub5LiJIOS6lGbD uiDkuIPkuIkK5YWt5LqUIOS4g+S6jCDkuIPkuIkg5LqUZsO6IOWFreWFqyDlha3lha0g5LiDZMSr Cg==
""".replace(
        " ", ""
    )
    .replace("\n", "")
    .replace("\r", "")
)

data = base64.b64decode(data).decode("utf-8")

data = data.replace("\n", " ").split(" ")
data = [item.strip() for item in data if item]


# 中文数字与阿拉伯数字转换
def convert_chinese_to_arabic(input):
    chinese_to_arabic = {
        "零": "0",
        "一": "1",
        "二": "2",
        "三": "3",
        "四": "4",
        "五": "5",
        "六": "6",
        "七": "7",
        "八": "8",
        "九": "9",
        "ē": "e",
    }
    arabic_str = ""
    for i in input:
        if i in chinese_to_arabic.keys():
            arabic_str += chinese_to_arabic[i]
        elif i in string.ascii_letters or i in string.digits:
            arabic_str += i
        else:
            continue
    return arabic_str


data = [convert_chinese_to_arabic(item) for item in data]
data = [chr(int(i, 16)) for i in data]

offset = 7
for i in range(10):
    index = i
    while index < len(data):
        print(data[index], end="")
        index += offset

运行即可得到结果

HMV{Special_greetings_to_my_dear_Chinese_friends}