实现十进制负数求二进制的补码，方便广大学者实现视频或图像加解密过程中用到异或加密-Seeking to achieve a negative decimal binary complement, facilitate the realization of the majority of scholars, video or images used in encryption and decryption process XOR encryption

C语言编写双向循环链表26字母维吉尼亚加密解密，用codeblocks测试通过，见小甲鱼数据结构视频第22集。-C language bi-circular list 26 letters Virginia encryption and decryption, using codeblocks tested, see a small turtle data structure of the video the first 22 episodes.

base64随机字符混淆加密、解密-美拍视频地址解密,反推加密算法(Base64 random character confusion encryption and decryption - Beauty video address decryption, reverse encryption algorithm)