ENV Variable - how to pass values to another page? help

OK so I have a ENV Variable plugin on my index page which works great for the task I’m using it for but I need to be able to head off to another page and retrieve the values. I know this can be done using the URL but in this case I don’t want to use the URL because I don’t want the user to be able to change the values with the URL.

Is there a way to send the values upon navigating to a new page and retrieve those values on the page I’ve navigated to without using the URL? if so can someone please help me with an easy example?