https://www.cnblogs.com/xxj-bigshow/p/9860116.html
https://www.jianshu.com/p/a0c410c9675d
https://docs.oracle.com/javase/7/docs/technotes/guides/security/crypto/CryptoSpec.html
https://blog.csdn.net/weixin_30859423/article/details/99963356?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-6.channel_param&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-6.channel_param
https://www.cnblogs.com/demodashi/p/8458113.html