Assigning Each User a Unique 100 character Hash in Ruby on Rails

Question

I have a form on a website that takes in some personal information from the visitor. I\'m passing this information to another service and I need to assign each one of these for

Answer 1

The Ruby standard lib has a module for generating GUIDs:

http://ruby-doc.org/stdlib/libdoc/digest/rdoc/classes/Digest/SHA2.html

Example:

Digest::SHA1.hexdigest(Time.now.to_s)