How to detect unique device identifier without ip and remote add?

I need help if someone help me, please.

**How to detect unique device identifier without IP and remote add?** Window-Linux-OS-MAC OS-Android

I used code but got only Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.0.12137 Safari/537.3 this type data only.I need some more as like win/Linux mac or unique identity any option. For that option, I can detect if he used any VPN or proxy server.

If need I will ready to pay

if you need the OS value its already available in the user agent
however that can't be used to detect if the user is using a proxy or not

Can you add me at s-k /y pe rabiul982 >? or send your I will be added.

Unique identifier is not possible to retrive over the web.

Few options is approved Java applet ran which has system access
Use flash and dump a cookie you can access later (or try to bypass proxy settings this way)
Use Canvas in JavaScript to write an image based on the settings of the browser and cookies which you can match later if the image is the same, it's the same browser.
IP can be checked easy online to see where it's hosting i.e. which provider, which ISP etc.
Setup WebRTC and hope he don't use a VPN which masks this too. Record the ip connected to your medie server.

Your options are limited.

Alternatively, setup an empty FB page and add a likejacker on your site. Send this site ONLY to the person you want to deanonymoize and actively check your fb pages likes who has liked it. This requires him to be logged in to facebook.

You need to learn how to read a User-Agent. Everything you are asking about can be deciphered by looking at it. For example in the one you listed, "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.0.12137 Safari/537.3" you can actually tell exactly what you are interested in. If you're only looking for the OS like you mentioned it's always listed there. That one there is Windows7, but if it were Linux, Android, or even a Mac, you'd be able to see it because it would say right there in place of Windows. So for Linux you might see "(X11; Linux x86_64)", but again it's listed right there for you to see. If you need more than that there are other parameters you can add in your code to have things like the resolution and screen size, among many others returned as well. This link might actually help you out a lil in understanding them a bit more. https://msdn.microsoft.com/en-us/library/ms537503(v=vs.85).aspx