lumenserial Unofficial writeup: http://m4p1e.com/web/20181224.html https://www.cnblogs.com/iamstudy/articles/code_breaking_lumenserial_writeup.html http://www.kingkk.com/2018/11/Code-Breaking-Puzzles-%E9%A2%98%E8%A7%A3-%E5%AD%A6%E4%B9%A0%E7%AF%87/