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Fingerprint Authentication

Fingerprint Authentication. Kevin Amendt David Friend April 26, 2006 - MIT Course 6.111 Project Presentations. Authentication. Nontransferable (possession based) Keycard Fingerprint Transferable (knowledge based) Password Certificate. Overview of System. Two operation modes

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Fingerprint Authentication

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  1. Fingerprint Authentication Kevin Amendt David Friend April 26, 2006 - MIT Course 6.111 Project Presentations

  2. Authentication • Nontransferable (possession based) • Keycard • Fingerprint • Transferable (knowledge based) • Password • Certificate

  3. Overview of System • Two operation modes • Add to database • Validate a user

  4. System Operation(Database Entry)

  5. System Operation(Validation)

  6. Validation • The same fingerprint differs between images: • Translation • Rotation • Scaling • Noise

  7. Validation • How to match two fingerprint images? • Two Methods: • Feature Matching • Pattern Matching

  8. Feature Matching • Locate specific characteristics of the fingerprint (minutiae), where ridges end or branch • Match minutiae between images • Considered the more accurate algorithm • Usually implemented through software, and difficult to implement with digital logic

  9. Pattern Matching • Simple idea (maybe better for 6.111): overlay images and see if they match • Problems… • Noise: Set a threshold. If it’s “close” • Translation: Use convolution • Rotation: User training • Scaling: Will consider this a noise problem

  10. Conclusion • Fingerprint ID • Pattern matching validation • Compute convolution sum and compare to threshold

  11. How Convolution Works

  12. Detailed Block Diagram

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