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UW CSEP 590 Term paper

UW CSEP 590 Term paper. Biometric Authentication Shankar Raghavan. Definition and Advantages. Physical or behavioral characteristics Much longer, random than a traditional password Always there with the person Unique to a person. Common biometric identifiers.

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UW CSEP 590 Term paper

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  1. UW CSEP 590 Term paper Biometric Authentication Shankar Raghavan

  2. Definition and Advantages Physical or behavioral characteristics Much longer, random than a traditional password Always there with the person Unique to a person

  3. Common biometric identifiers FRR/FAR are measures for accuracy

  4. Authentication mechanism, threats • If template is compromised, is the biometric identifier lost for ever? • Is there any good method for Tye 1 or type 2 attacks?

  5. Fingerprint minutiae

  6. Attacks and Defences • Dummy finger (Type 1) • Gummy finger – Matsumoto (Type 1) • Hill climbing attack (Type 4) • Liveness detection (Type 1) • WSQ data hiding (Type 2) • Advantages of iris/retinal scannings • Image based challenge response systems

  7. Fuzziness in biometrics • n of N attributes match • Application of Shamir’s secret sharing • Identity based encryption using bilinear maps • Uses different polynomials for each user • Generates a private key for every attribute user has, this is distinct and not shared with another user. • Interpolates polynomial in an exponent

  8. Fuzzy biometrics (backup) • Fuzzy commitment • x and x’ will both decode to a similar value • Not able to handle rotational/translational aspects of order invariances in an image very well. • Fuzzy vault • Maps a set that hold the key to a secret onto a polynomial p ie each value in the set is an x coordinate for a point evaluated by p. • Adds some noise or chaff so that the encrypted set becomes p(x),

  9. Questions?

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