# [rev] Digital play - Tamil CTF 2021

###### tags: `TamilCTF2021` `rev`

Solver script for this challenge.

from Crypto.Util.number import long_to_bytes

enc = open('enc.txt', 'r').read().split(' ')
flag = ''

for i, e in enumerate(enc):
    if i % 2 == 0:
        t = int(e.replace('1', '2').replace('0', '1').replace('2', '0'), 2)
    else:
        t = int(e, 2)
    flag += long_to_bytes(t ^ 0x4d415253).decode()

print(flag)
# TamilCTF{D1g1T_CiRCu1T5_aRe_AwE50Me}