obfuscurity

https://github.com/gma/obfuscurity

Sometimes exposing your app's internal counters (e.g. your database's auto-incrementing primary keys) to the world is a bad idea. Maybe your competitors will be able to work out how many orders you're making per week, or your customers will be able to infer how many other customers you've got. This gem will allow you to obscure those numbers so you can use them in your URLs, your user interface, or as seemingly random order numbers.