Biometrics: Fingerprint Technology Calvin Shueh Professor Stamp CS265.
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Transcript of Biometrics: Fingerprint Technology Calvin Shueh Professor Stamp CS265.
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Biometrics:Fingerprint Technology
Calvin Shueh
Professor Stamp
CS265
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Agenda
Why Biometrics? Fingerprint Patterns Advanced Minutiae Based Algorithm Identification vs. Authentication Security Applications Versus other Biometric Technologies Industry
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Why Biometrics?
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Why Biometrics?
Know Password, PIN
Have Key, Smart Card
Are Fingerprint, Face, Iris
Biometrics is a security solution based on something you know, have, and are:
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Why Biometrics?
Passwords are not reliable.– Too many – Can be stolen– Forgotten
Protect Sensitive Information– Banking– Medical
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Why Biometrics?
Has been used since 14th century in China– Reliable and trusted
Will never leave at home Fingerprints are unique
– Everyone is born with one
80% of public has biometric recorded
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Fingerprint Patterns
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Fingerprint Patterns 6 classes of patterns
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Fingerprint Patterns Minutiae
– Crossover: two ridges cross each other
– Core: center
– Bifurcation: ridge separates
– Ridge ending: end point
– Island: small ridge b/w 2 spaces
– Delta: space between ridges
– Pore: human pore
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Fingerprint Patterns
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Fingerprint Patterns
Two main technologies used to capture image of the fingerprint– Optical – use light refracted through a prism– Capacitive-based – detect voltage changes in
skin between ridges and valleys
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Advanced Minutiae Based Algorithm (AMBA)
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Advanced Minutiae Based Algo
Advanced Minutiae Based Algorithm– Developed by Suprema Solutions– Two processes
• Feature Extractor
• Matcher
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Advanced Minutiae Based Algorithm
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Advanced Minutiae Based Algo
Feature Extractor– Core of fingerprint technology– Capture and enhance image– Remove noise by using noise reduction
algorithm– Processes image and determines minutiae
• Most common are ridge endings and points of bifurcation
• 30-60 minutia
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Advanced Minutiae Based Algo Feature Extractor
– Capture Image
– Enhance Ridge
– Extract Minutiae
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Advanced Minutiae Based Algo Feature Extractor
– Most frequently used minutiae in applications
• Points of bifurcation
• Ridge endings
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Advanced Minutiae Based Algo
Feature Extractor – Minutiae Coordinate and Angle are calculated
– Core is used as center of reference (0,0)
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Advanced Minutiae Based Algo Matcher
– Used to match fingerprint– Trade-off between speed and performance– Group minutiae and categorize by type
• Large number of certain type can result in faster searches
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Identification vs. Authentication
Identification – Who are you?– 1 : N comparison– Slower– Scan all templates in database
Authentication – Are you John Smith?– 1 : 1 comparison– Faster– Scan one template
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Security
Accuracy– 97% will return correct results– 100% deny intruders
Image– Minutiae is retrieved and template created
• Encrypted data
– Image is discarded• Cannot reconstruct the fingerprint from data
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Security
Several sensors to detect fake fingerprints– Cannot steal from previous user
• Latent print residue (will be ignored)
– Cannot use cut off finger• Temperature
• Pulse
• Heartbeat sensors
• Blood flow
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Applications
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Applications
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Versus other Biometric Technologies
Technology Accuracy Convenience Cost Size
Fingerprint 5 5 4 4
Voice 1 5 5 5
Face 2 3 4 3
Hand 3 3 2 2
Iris 5 2 3 3
1 (worst) – 5 (best)
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Versus other Biometric Technologies
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Industry Hot market Lots of $$$
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Conclusion
Want to protect information Passwords are not reliable; forget Fingerprints have been used for centuries Fingerprints are unique; can verify Very accurate Lots of applications being developed Hot market. Lots of $$$
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Biometrics: Fingerprint Technology
THE END!