Bcrypt.js /Samples/PixelStreaming/WebServers/SignallingWebServer/ This is used to verify passwords match the ones stored using the bcrypt algorithm. The passwords are always stored using bcrypt and so we never know the unencrypted password. This allows us to implement a authentication system on the web server so that only people we give accounts to can access the web server. This use is only for prototype stage, production will use the Epic unreal account system https://github.com/dcodeIO/bcrypt.js/blob/master/LICENSE P4 /UE4/Main/Engine/Source/ThirdParty/Licenses