Rotate-me!

4KB

chal3

Category: Crypto - Points: 100 - Solves: Description: This communication has just been intercepted, decipher the hidden message!

Solution: To solve this challenge you need to decipher the flag in the chal2 file. If we do a file chal3 command, we can see that's a long ASCII text file. To see the content file, we do cat chal3 and this string is send back :

Content

01010001 01010111 01111000 01111001 01100001 01010111 01100100 01101111 01100100 01000011 01110111 01100111 01010100 01101101 00111001 00110011 01001001 01000111 01011010 01110110 01100011 01101001 01000010 00110000 01100001 01000111 01010101 01100111 01011010 01101101 01101100 01110101 01011001 01010111 01110111 01100111 01100011 00110011 01010010 01101000 01011010 00110010 01010101 01110011 01001001 01000111 01000101 01100111 01100011 00110011 01010110 01101001 01100011 00110010 01101100 00110000 01100100 01010111 01000110 00110000 01100001 01010111 00111001 01110101 01001001 01000111 01001110 01110000 01100011 01000111 01101000 01101100 01100011 01101001 00110100 01100111 01010011 01000111 01010110 01111001 01011010 01010011 01000010 00110011 01011010 01010011 01000010 01111001 01011010 01011000 01000010 01110011 01011001 01010111 01001110 01101100 01011010 01000011 01000010 01101100 01100100 01101101 01010110 01111001 01100101 01010011 01000010 01101000 01100010 01001000 01000010 01101111 01011001 01010111 01001010 01101100 01100100 01000111 01101100 01101010 01001001 01000111 01001110 01101111 01011001 01011000 01001010 01101000 01011001 00110011 01010010 01101100 01100011 01101001 01000010 00110011 01100001 01011000 01010010 01101111 01001001 01000111 01000101 01100111 01011001 01010111 00110101 01110110 01100100 01000111 01101000 01101100 01100011 01101001 01000010 01101010 01100010 00110011 01001010 01111001 01011010 01011000 01001110 01110111 01100010 00110010 00110101 01101011 01011010 01010111 00110101 01101010 01011010 01010011 01000010 01101011 01100001 01010111 01011010 01101101 01011010 01011000 01001010 01110101 01011010 01011000 01010001 01100111 01011001 00110010 01101000 01101000 01100011 01101101 01000110 01101010 01100100 01000111 01010110 01111001 01001100 01101001 01000010 01000100 01011001 01010111 00110100 01100111 01100101 01010111 00111001 00110001 01001001 01000111 01011010 01110000 01100010 01101101 01010001 01100111 01100100 01000111 01101000 01101100 01001001 01000111 01011010 01110000 01100010 01101101 01000110 01110011 01001001 01000111 01011010 01110011 01011001 01010111 01100011 00101111 01001001 01000110 01110000 01110011 01100001 00110010 01010010 01110110 01100101 01001000 01000110 01110111 01001001 01010011 01000010 01010111 01100010 01001000 01001001 01100111 01011010 00110011 01001010 01110111 01100011 01010011 01000010 01101010 01011010 01101101 01110100 01101101 01100011 01000111 01010110 01101001 01011001 01010011 01000010 01111000 01011010 01010111 01011010 01110111 01001001 01001000 01101100 01101001 01011010 01000111 01011010 01110010 01100001 00110010 01001010 01110110 01001001 01001000 01110000 01110110 01100100 01101101 00110001 01111000 01100010 01000011 01000010 00110110 01011010 01011000 01101000 01110000 01100001 01010111 01001010 01110010 01011010 01000111 01001001 01110101 01001001 01000101 01010110 01101001 01100010 00110010 01001001 01100111 01011010 01101110 01000001 01100111 01100101 01000011 01000010 01101011 01011010 01101101 01001110 01111000 01001001 01000111 01001110 01110011 01100010 01111001 01000010 00110010 01100010 01001000 01001010 01110110 01001001 01000111 01010110 00110100 01100010 00110010 01000101 01100111 01100100 01000111 01111000 01110110 01100001 01000100 01101111 01100111 01010010 01010110 01101000 01100001 01010011 01000101 01000110 01011001 01010110 01101110 01110011 00110011 01011010 01010100 01010010 01111000 01100011 01000110 00111001 00110000 01011010 01010100 01010010 01111000 01011000 00110011 01010010 01101001 01011000 00110011 01101111 00110000 01001101 01010100 01000110 01100110 01010111 01101101 00111001 00110010 01100010 01010100 01100011 01110111 01100110 01010001 00111101 00111101

To decrypt the ASCII content we can go on this website A Base64 is send back and to decrypt them we use this website A string with the flag format is send back and that's an Affine Cipher encryption.

🚩 FLAG

  HACKDAY{7h4ts_wh4t_we_c411_Cryp70}