Google Inc.

Andrew D Hintz

Stephen A Weis

Travis Elton McCoy

Iain P Wade

Michael Wiacek

Travis E Mccoy

This disclosure is directed for improved techniques for configuring a device to generate a secondary password based at least in part on a secure authentication key. The techniques of this disclosure may, in some examples, provide for capturing, by a computing device, an image of a display of another computing device. The captured image includes at least one encoded graphical image, such as a barcode, that includes an indication of the content of a secure authentication key. The computing device may use the secure authentication key to generate a secondary password to be used in conjunction with a primary password to gain access to a password-protected web service.

Image-based key exchange

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for authorizing actions of a service provider. In one aspect, a method includes providing a user security key to a mobile device of a user. A request is received from a client device distinct from the mobile device to perform an action. A challenge token including a security signature matched to a service security key is generated, and the challenge token is provided to the mobile device. An approval value is received from the client device. The approval value is determined to be valid in reference to the challenge token and the user security key previously provided to the mobile device and to indicate approval to perform the action for the user. The action is performed in response to receiving the approval value.

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Sunnyvale, CA, United States of America

Andrew D Hintz