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목록2025/01/21 (1)
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[Dreamhack] ROT128
문제 풀이 분석#!/usr/bin/env python3hex_list = [(hex(i)[2:].zfill(2).upper()) for i in range(256)]with open('flag.png', 'rb') as f: plain_s = f.read()plain_list = [hex(i)[2:].zfill(2).upper() for i in plain_s]enc_list = list(range(len(plain_list)))for i in range(len(plain_list)): hex_b = plain_list[i] index = hex_list.index(hex_b) enc_list[i] = hex_list[(index + 128) % len(hex_list)]enc_li..
Study/Crypto
2025. 1. 21. 14:00