Offense and defense in the world
crypto
1.base64
The task presenting base64 manner to obtain decrypted In Flag
cyberpeace Welcome_to_new_World {!}
2.Caeser
根据题目标题提示密文是通过凯撒密码的方式进行加密
因此可以得到flag
3.Morse
This is only the beginning of 1010 appears not subject to the law of numbers, but you can find it and follow the prompts about Morse code, a representative -, 0. So then decrypts the Morse code table to obtain the final In Flag
cyberpeace} {morescodeissointeresting
4. The hybrid coding
Given such a long list of topics ciphertext
Since it is a hybrid coding that flag is certainly more than one way to encrypt the ciphertext, first try a base64, decrypt ciphertext twice, got this string of characters
that among numbers are less than or equal to 97 119
which is exactly in the lower case alphanumeric ASCII codes.
So get into correspondence
The power-of encryption
Ciphertext
first time I saw nothing thinking, and turn to Baidu
search to a cipher called a 01248 clouds password.
Principle is based on the interval 0, 1,2,4,8 letters correspond with the sum of the numbers of letters 26, can be obtained
WELLDONE
substituting the ok flag format
6.Railfence
Password has been no stranger to the fence, but all possibilities have been tried or try out.
So help Baidu once again, that a variant of the fence password (w type) (it seems that my stock of knowledge is not enough ah)
principle is expressly left to right are arranged in the shape of w, then left from the arranged pattern to right from top to bottom ciphertext
example: 12345 plaintext
FIG arrangement
. 1. 5. 3
2. 4
ciphertext 13524
obtained flag
