This RUBY library allows you to use TextKey's REST API calls server-side from a Java backend. TextKey is an omni-factor authentication API that uses seven-factors of authentication to provide security for devices ranging from mobile to electronic door locks. TextKey works through using SMS service, unique code, cellular number, UDID, a single use URL, and an optional pin. TextKey uses Rest with a JSON response and SOAP. TextKey is free for ten users, and available for a monthly charge per user thereafter.
Just like airport security, a system hosting a public API has to deal with heavy loads of incoming traffic every day. Most of that traffic is legitimate but not always. David Andrzejek explains to you how you can keep the bad apples out of your API while still serving millions of requests each day.