题目地址:https://buuoj.cn/challenges#[BJDCTF%202nd]%E6%9C%80%E7%AE%80%E5%8D%95%E7%9A%84misc-y1ng
伪加密
修改标志位即可
明显缺少png
头
89 50 4E 47
424A447B79316E677A756973687561697D
PS C:\Users\Administrator> php -r "var_dump(hex2bin('424A447B79316E677A756973687561697D'));"
Command line code:1:
string(17) "BJD{y1ngzuishuai}"
BJD{
y1ngzuishuai}