https://blog.clarence.tw/2022/03/13/%e5%9c%a8-python-3-%e5%a6%82%e6%9e%9c%e9%9c%80%e8%a6%81%e7%94%a8%e5%88%b0-crypto-cipher-%e6%80%8e%e9%ba%bc%e8%be%a6%ef%bc%9f/