BugKuCTF 加密 easy_crypto
作者：互联网
0010 0100 01 110 1111011 11 11111 010 000 0 001101 1010 111 100 0 001101 01111 000 001101 00 10 1 0 010 0 000 1 01111 10 11110 101011 1111101
题解：
长度不一的01字符串 考虑是不是摩斯密码
C#版本
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ConsoleApp1
{
class Program
{
static void Main(string[] args)
{
string oldstr;
oldstr = Console.ReadLine();
string []str = oldstr.Split(' ');
for (int i = 0; i < str.Length; i++)
{
switch (str[i])
{
case "01":
Console.Write("A"); break;
case "1000":
Console.Write("B"); break;
case "1010":
Console.Write("C"); break;
case "100":
Console.Write("D"); break;
case "0":
Console.Write("E"); break;
case "0010":
Console.Write("F"); break;
case "110":
Console.Write("G"); break;
case "0000":
Console.Write("H"); break;
case "00":
Console.Write("I"); break;
case "0111":
Console.Write("J"); break;
case "101":
Console.Write("K"); break;
case "0100":
Console.Write("L"); break;
case "11":
Console.Write("M"); break;
case "10":
Console.Write("N"); break;
case "111":
Console.Write("O"); break;
case "0110":
Console.Write("P"); break;
case "1101":
Console.Write("Q"); break;
case "010":
Console.Write("R"); break;
case "000":
Console.Write("S"); break;
case "1":
Console.Write("T"); break;
case "001":
Console.Write("U"); break;
case "0001":
Console.Write("V"); break;
case "011":
Console.Write("W"); break;
case "1001":
Console.Write("X"); break;
case "1011":
Console.Write("Y"); break;
case "1100":
Console.Write("Z"); break;
case "01111":
Console.Write("1"); break;
case "00111":
Console.Write("2"); break;
case "00011":
Console.Write("3"); break;
case "00001":
Console.Write("4"); break;
case "00000":
Console.Write("5"); break;
case "10000":
Console.Write("6"); break;
case "11000":
Console.Write("7"); break;
case "11100":
Console.Write("8"); break;
case "11110":
Console.Write("9"); break;
case "11111":
Console.Write("0"); break;
case "001100":
Console.Write("?"); break;
case "10010":
Console.Write("/"); break;
case "100001":
Console.Write("-"); break;
case "010101":
Console.Write("."); break;
case "110011":
Console.Write(","); break;
case "011010":
Console.Write("@"); break;
case "111000":
Console.Write(":"); break;
case "101010":
Console.Write(";"); break;
case "10001":
Console.Write("="); break;
case "011110":
Console.Write("'"); break;
case "101011":
Console.Write("!"); break;
case "001101":
Console.Write("_"); break;
case "010010":
Console.Write("\""); break;
case "10110":
Console.Write("("); break;
case "101101":
Console.Write(")"); break;
case "0001001":
Console.Write("$"); break;
case "01000":
Console.Write("&"); break;
}
}
}
}
}
运行结果：
得到：
FLAGM0RSE_CODE_1S_INTEREST1N9!
但是问题来了，提交flag为 FLAG{M0RSE_CODE_1S_INTEREST1N9!} 时不正确，可能是因为要求答案为小写吧，于是修改flag为小写，注意其中有字符“1”、“0”、“9”，不要与字母弄混了哟
flag：
flag{m0rse_code_1s_interest1n9!}
Python版本
from __future__ import print_function
a = input("input the string:")
s = a.split(" ")
dict = {'01': 'A',
'1000': 'B',
'1010': 'C',
'100':'D',
'0':'E',
'0010':'F',
'110': 'G',
'0000': 'H',
'00': 'I',
'0111':'J',
'101': 'K',
'0100': 'L',
'11': 'M',
'10': 'N',
'111': 'O',
'0110': 'P',
'1101': 'Q',
'010': 'R',
'000': 'S',
'1': 'T',
'001': 'U',
'0001': 'V',
'011': 'W',
'1001': 'X',
'1011': 'Y',
'1100': 'Z',
'01111': '1',
'00111': '2',
'00011': '3',
'00001': '4',
'00000': '5',
'10000': '6',
'11000': '7',
'11100': '8',
'11110': '9',
'11111': '0',
'001100': '?',
'10010': '/',
'101101': '()',
'100001': '-',
'010101': '.',
'110011':',',
'011010':'@',
'111000':':',
'101010':':',
'10001':'=',
'011110':"'",
'101011':'!',
'001101':'_',
'010010':'"',
'10110':'(',
'1111011':'{',
'1111101':'}'
};
for item in s:
print (dict[item],end='')
得到：
FLAG{M0RSE_CODE_1S_INTEREST1N9!}
提交错误 全改成小写就对了：
flag{m0rse_code_1s_interest1n9!}
记事本替换版本
..-. .-.. .- --. ----.-- -- ----- .-. ... . ..--.- -.-. --- -.. . ..--.- .---- ... ..--.- .. -. - . .-. . ... - .---- -. ----. -.-.-- -----.-
flag----.--m0rse code 1s interest1n9!-----.-
空格改下划线_,两端无法解密摩斯电码改为大括号
flag{m0rse_code_1s_interest1n9!}
标签：case,Write,Console,..,crypto,break,flag,easy,BugKuCTF 来源： https://blog.csdn.net/weixin_43272781/article/details/101173068