Demonstrated during Bill Gates’ keynote address at the RSA Conference yesterday, the software comprises a system for producing cards and subsequently verifying that they have not been altered.

Cards would consist of a photograph of the bearer, along with some personal information such as date of birth. The photo and the data would be hashed and stored in a two-dimensional color bar code on the card itself.

Tampering could be subsequently detected by scanning the entire card and reperforming the hash, to see if it matched the one on the card. The word biometric seems to be loosely applied here to the fact that the cards carry photographs.

Gates did not give a firm data for when the company expects to come to market with this technology, but it was suggested that it will not be this year.

This article is based on material originally published by ComputerWire