Is windows built-in Remote Desktop secure? I mean, does it use any encryption methods? or someone can hijack the data that have been transferred between two system?
Windows Remote Desktop Security – Is It Safe and Reliable?
encryptionremote desktopSecuritywindows
Best Answer
There are two aspects of the security you should be aware of, how it creates the connection and how the connection is secured. There are two different modes for securing the creation of the connection for remote desktop, Legacy mode (I don't think it has a name) and Network Level Authentication (NLA). When you allow remote desktop you can choose if you only want to allow NLA connections or allow connections from the older legacy mode too.
NLA mode is much more secure and has less possibilities for people to capture data from or intercept the connection while it is being established.
For the connection itself there are many fine tuning settings that are all set server side. The Help file summarizes much better than I can so I will just quote that.