[中文](./README_zh.md) [English](./README.md)

Please download the [WP_zh.md](WP_zh.md) or [WP.md](WP.md). Github doesn't support rendering math equations. You can render locally.


Original writeup (https://github.com/De1ta-team/De1CTF2019/tree/master/writeup/crypto/Obscured).