Importance

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Abstract

This invention provides for progressive processing of biometric samples to facilitate user verification. A security token performs initial processing. Due to storage and processing limitations, false rejections may occur. To overcome this, the biometric sample is routed to a stateless server with greater processing power and data enhancement capabilities. The stateless server processes and returns an enhanced biometric sample to the security token for another attempt at verification. In another embodiment, the security token may have a second failure when verifying the enhanced biometric sample. It can then send the enhanced or raw biometric sample to a stateful server. The stateful server processes the biometric sample and performs a one to many search of a biometric database having a master set of enrolled authorized user biometric templates. The security token uses signals from the stateful server to grant or deny access. In both embodiments, heuristics remain with the security token.

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First Claim