Drexler Technology Corp., best known for the LaserCard optical memory technology, has gotten approval for a patent that it says can enhance security in electronic commerce.

The Mountain View, Calif., company says it is seeking to combine its technology with chip cards-it calls them Smart/Optical cards-to prevent counterfeiting. It says it can customize for various electronic commerce systems, relying on "prerecorded or post-recorded validation data" encoded on the card.

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