Encrpting urls to hide PKs

I have a form that I use to collect contact information from
unregistered users. When they submit the form I want to redirect to a
confirmation page (as the Django documentation suggests). However,
instead of a generic page, I wanted to include the information that
they have submitted and the contact details of the person for their
area. I was also thinking that I could include the current status of
their enquiry. Therefore they could perhaps use the same link to come
back to check the status of their query.

Given that, is there a best practice pattern for handling this
situation? I have a quick demo where the URL is:

http://www.mydomain.com/contact/confirmation/1234

... where '1234' is the pk for the query. Obviously I would want to
encrypt the pk in this case, otherwise someone could just use the pk
to trawl through the database.

Are there any default ways of encrypting django urls?

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