Image-based key exchange

摘要

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.

主权项

1. A method of configuring a first computing device to provide a secondary authentication password for a password-protected web service, the method comprising:
capturing, using an image capture device communicatively coupled to a first computing device, an encoded graphical image presented by a display of a second computing device, wherein the encoded graphical image comprises at least one indication of a uniform resource locator (URL), and at least one graphically encoded indication of how to use a secure authentication key to generate the secondary authentication password, wherein the URL indicates a location where the secure authentication key can be accessed; accessing the URL to determine the secure authentication key; storing the secure authentication key on the first computing device; generating the secondary authentication password using the stored secure authentication key and the at least one graphically encoded indication of how to use the secure authentication key to generate the secondary authentication password; and using the secondary authentication password to acquire access to a password-protected web service.