In my searches I have already found the Object - navigator , to get the pertinent information to the user 's browser.
However, I did not find anything satisfactory in this navigator that I can use to join to generate a unique identifier of that browser, to be able to store (DB) and recognize in a future access. p>
Summarizing : It has to be unique for each browser (eg Token, MD5).
Sirs, do you have any suggestions? or is it something that is right in front of my eyes and did not see?