Google introduces a secure sign-in capability for Google Apps: 'Two-step verification' -- designed to allow integration with other vendors authentication technologies in the future. "When enabled, it requires two means of identification to sign into Google Apps: "a password, and a mobile phone". After entering password, a verification code is sent to mobile phone via SMS, voice calls, or generated on an app you can install on Android, BlackBerry or iPhone. This makes it much more likely that you're the only one accessing your data: even if someone has stolen your password, they'll need more than that to access your account. You can also indicate when you're using a computer you trust and don't want to be asked for a verification code from that machine in the future.
We're also open sourcing our mobile authentication app so that companies can customize it as they see fit," explains Google.
Google Apps Premier, Education, and Government Editions admins can activate Two-step verification from English admin control panel now. Once enabled, end users can set it up in Accounts tab in Gmail settings.