[ Developer]

Google announced several improvements to Google+ Sign-in today.

A major one is support for all Google account types. Now, Google Apps users or even those without Google+ accounts can use the feature to sign into third party apps and internet sites.

The second upgrade is straightforward migration from other auth methods.

As product manager Yaniv Yaakubovich, explains, “If you’re using OpenID v2 or OAuth 2.0 Login for authentication and wish to upgrade to Google+ Sign-In, we’ve made it easy to take action; it’s entirely your choice. Google+ Sign-In can grow your audience in multiple ways — including over-the-air installs, interactive posts, and cross-device sign-in — and now it’s fully compatible with the OpenID Connect standard.”

There’s a migration guide here.

Finally, they’ve added incremental auth, that is dsecribed as “a new approach to ask users for the proper permission scopes on the right time, versus all permissions directly.”

“For example: In case your app allows users to save lots of music playlists to Google Drive, you may ask for basic profile info at startup, and only ask for Google Drive permissions when they’re able to save their first mix,” explains Yaakubovich. “Likewise: that you may ask for Google Calendar permissions only when users RSVP to an event, and so forth.”

Google recommends developers ask for the minimum set of permissions, after which for more as required.

Image: Google