# [AIdrifter CS 浮生筆錄](https://hackmd.io/bKL1LVo8RaCKn02uHJW2BA#) Crypto ## What’s digital signature(數位簽名) and digital certificate(數位證書) -[數字簽名是什麼-阮一峰](http://www.ruanyifeng.com/blog/2011/08/what_is_a_digital_signature.html)  ## 介紹對稱式(symmetric)與非對稱式(asymmetric)的差異 ## 常見AES演算法 ## 常見非對稱式加解密
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