As web applications, services and mashups evolve, a perennial problem begins to assert itself—the issue of authorization (or in layman’s terms, making sure both application and service know who you are). A number of different approaches have been developed; one such approach is the OAuth specification, which is designed as a fool-proof way of validating requests.
Because of the growing popularity of the OAuth protocol, we’ve added support for it to the Dojo Toolkit in the form of dojox.io.OAuth—which can be used to sign any request made with the Dojo Toolkit’s various Ajax methods, including XHR, IFrame and Script transports.

