Whether data cannot be passed between browser pages, provided that the server cannot be uploaded

The browser page is not able to pass data, the condition is that the server cannot be uploaded
For security reasons, the data to be passed cannot be uploaded to the server, which leads to the unavailability of the data link parameter.

Cookies are uploaded to the server, and cookies seem to be very insecure.
------to solve the idea----------------------
Why is the link parameter method not available? Security check of data in the background it's okay.
------to solve the idea----------------------
Http://www.***.com/index.html#xxxx
Use a stroke.

