But practically speaking, the technologies have failed to gain much market traction. That's partly because of interoperability concerns stemming from the scattered nature of the development work in this area. There has also been a general lack of awareness of the cards among businesses and consumers.

The Information Card Foundation (ICF), a nonprofit group to be formally launched Tuesday by a group of industry heavyweights, including Microsoft, Oracle, Google and PayPal, hopes to effectively address these issues. The group will focus on bridging the communication and technology gaps that exists between the various vendor and industry group offerings in the information card space.

The group will also work to create a more unified and consistent message to consumers and businesses about the security and ease-of-use benefits of information cards.

Information cards are essentially the digital equivalent to physical credentials such as driver's licenses and state-issued ID cards. The digital version allows the holder of the card to authenticate his identity without needing to enter a username or password when entering a site or conducting an online transaction.

The cards can be populated by identity information provided by the users themselves, such as name, age, sex and address information, or with information that has been vetted by a reliable third party such as a bank, a credit card company or even a government entity.

"People who have been working on this stuff felt we needed an organization that can help drive market adoption" of information card technologies, said Paul Trevitchick, chairman of ICF. "There are many offerings out there, but there never has been a voice for the technology's power."

A lack of "inclusiveness" among the various vendors and technology groups has raised interoperability questions and created an "us vs. them" mentality in the space, he said. "We need to drive toward convergence and interoperability."

Examples of digital-ID technologies include Microsoft's Windows CardSpace, Novell's Digital ME and the Eclipse Foundation's open-source-oriented Project Higgins, all of which allow users to store and use multiple information cards containing different identity information on their desktops. The tools allow users to release as much or as little of their identity as needed to complete an online transaction. For instance, a user could supply a Web site looking for basic identity information with a self-issued information card, while using an identity card supplied by a credit card company when filling out an online loan application.