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Add Fingerprint Scan-based Security to Your .NET Applications Today : Page 3

It wasn't all that long ago that biometric authentication seemed like the kind of sci-fi technology that might never be practical outside of top-secret government laboratories. But believe it or not, you can build a fingerprint scanner into any .NET application you like just by following these simple instructions.

Testing the Application
You are now ready to test the application. Press F5 in Visual Studio .NET 2003 and you will see the application as shown in Figure 8.

Place your index finger on the fingerprint reader and you should be prompted to register with your particulars (personal data). Once registered, your particulars will be cleared after five seconds. Once that's completed, you can try placing the same finger to check if you can be identified correctly. If so, you will see your information displayed as in Figure 9.

Figure 8. Testing the Application: This is the first screen you will see upon launching the application. It prompts the user for his or her fingerprint scan.
Figure 9. The application displays the information of an identified user.

Note that there will be times where your fingerprint may not be correctly identified. This is likely due to incorrect positioning of your finger. Try again and it should be identified correctly.

Applications for Biometrics Abound
In this article, you have seen how you can integrate the fingerprint reader into your .NET application. While the example shown in this article is very simple, you can easily extend it to more complex scenarios, such as video rental applications, payment services, etc. If you have not started evaluating biometric authentication for your projects, this is a very good time to start.

Wei-Meng Lee is a Microsoft .NET MVP and co-founder of Active Developer, a training company specializing in .NET and wireless technologies. He is a frequent speaker and author of numerous books on .NET, XML, and wireless technologies.
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