Rails - Jun 2010 - Best strategy to implement secure, one-time voting links

I am building an application where guests and registered users are
sent an email with a request to vote on a given issue.
- registered user sends vote request email,
- email containts voting  links that have some type of enrypted link
paramenter to uniquely identify the vote request to that recipient
- recipient clicks on appropriate link to vote
- the link is then invalid after the vote

I want to incorporate this with state_machine.

Is there a gem that helps enable this or is this something I should
build myself.

Devise and authlogic seem to do it but only for the user model - a
user could have many such vote requests outstanding at any time).

For those who have looked at Hobo, this is basically what they call a
"secure link" patter and it uses a key and key timestamp to enable the
process

Thanks!

-- 
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en.