说明：  我自己为普华永道大学挑战撰写的文章，这是一个教育平台，供学生和其他感兴趣的各方以动手的方式学习和实践核心网络安全概念。
(My own writeups for pwn college challenges, which is an education platform for students and other interested parties to learn about, and practice, core cybersecurity concepts in a hands-on fashion.)