need one indicator protected on server side.(protected from packet sniffers)

I have a basic indicator that I want protected using web server. I have my own web server for licensing etc. It should be able to issue license keys and I should be able to enable/disable it on my end or set a trial. Here are more requirements... 1. Must be able to restrict MT4 accounts or PC's. (so that license key cannot be sharred) 2. Data sent from the web server to Client side MUST be encrypted and protected from packet sniffers. 3. Remaining code in DLL MUST not reveal code! Commonly, even though some code is on server side, what these crackers do is decompile the DLL and read the code and then patch up the rest of the code and recompile without protections. I need MOST of the code protected on server. If they break DLL, they should NOT be able to patch it up. Note that I am not looking to hide code in DLL only, those always get cracked. I need server side protections. Once again I have a web server already we can use.