Is there an easy way to work with parameters, but without seeing them in urls?

[eluser]CARP[/eluser]
I'm working with some functions that require 3 or more parameters
I'm passing all of them in the url

Is there an easy way to avoid them showing in urls? Should I replace (in views) links with parameters by forms and hidden fields? Ajax? Encrypt Parameters?

I'd like users to avoid playing manually with parameters in the url

Thanks