Nodejs / angular js : secure my data to my client

after some week of research I will need your help ..

I developed a client (in agularjs) and a server (in Nodejs / Express) with mongodb. Here is my problem, so I have my client who just type in port 3000 to retrieve the data everything works and what.

I also use satellites as an authentication system.

My only complaint and some of it's public and private. Basically I have my music with artists (public party) and playlists (that contain music) that is private. So no problem, but I want to hide the public data coming from my web service without the user having to connect. I do not know if you see the problem.

I am lost on the securing part I do not see at all how to do it ..

Thank you in advance.

via Dd Vivi