The GA4PHP Project ================== GA4PHP means Google Authenticator for PHP. The purpose of this "library" is to provde a convienient and hopefully simple way of provisioning and authenticating users using the Google Authenticator mechanism. For now this lib will only support GA's hotp methods. Why? ==== Mostly cause I can. Recently i've been heavily interesting in what is "out there" for FOSS based authentication projects and the Google Authenticator is based on OATH - HOTP/TOTP. It also has a few kewl features, like providing its secret key via QR codes. But looking at the App's available for smartphones (android, iphone, etc), the google auth app was the only one that fullfilled some realistic criteria - easy to use, easy to provision. How To Use It? ============== See the examples and the wiki over at the project page, http://code.google.com/p/ga4php/