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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
UW CSEP 590 Term paper

Biometric Authentication

Shankar Raghavan

definition and advantages

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
Common biometric identifiers

FRR/FAR are measures for accuracy

authentication mechanism threats
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?
attacks and defences
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
fuzziness in biometrics
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
fuzzy biometrics backup
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),
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