post - Are https URLs encrypted? - Stack Overflow: "But if you are using GET instead of POST then the user will still be able to cut and paste the URL out of the location bar, and you will probably not want to put confidential information in there that can be seen by anyone looking at the screen.
All that said, you should be careful of your terminology. To quote a famous swashbuckler: You keep using that word (URL) I do not think it means what you think it means"
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