asp.net中 web.config中连接用户名和密码是用什么加密的求解

Question

<add key="databaseconn_Server" value="173.231.20.198" />
<add key="databaseconn_DB" value="wws" />
<add key="databaseconn_User" value="5AC73768E6407058AE9EB9AF3EDC51B8" />
<add key="databaseconn_Pwd" value="6EEE571A7A2FF218FCB3E0071AD2A94B" />

</appSettings>
<connectionStrings />

求大神指导，用户名和密码是用什么加密的，谢谢