At the verification stage, the image of the fingerprint is compared against the authorized user's minutia file to determine a match and grant access to the individual. Potential Issues Fingerprint authentication is becoming a popular method for authorization but is still met with some resistance from the public. Many associate fingerprint scanning with the fingerprinting of alleged criminals and are therefore hesitant to accept this technology. False rejection occurs when a registered user does not gain access to the system. This person has then been falsely rejected from access.
False acceptance is when an unauthorized user gains access to a biometrically protected system.
Although fingerprints are unique to an individual, there are instances where a fingerprint may become distorted and authorization will not be granted to the user. As discussed above in image processing, dirt, cuts, scars, sweat and dry skin can cause fingerprint distortion. According to the International Computer Security Association 1999 Biometrics Survey, more than 330 fingerprint authentication products are marketed by vendors. This raises concerns over standards, integration with existing systems and long-term support. The speed and cost of data scanning, storage, and retrieval technology has progressed to the point that the use of fingerprint recognition for security is now a feasible and affordable alternative to conventional security practices.