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ADVANTAGES DISADVANTAGES OF BIOMETRIC SYSTEMS Here are some of the advantages and disadvantages of fully developed biometric systems that are fairly accurate Retinal scans electronic scan of the innermost layer of the eyeballs wall Advantages Retina generally remains stable through life ensuring accuracy - Disadvantages Requires close physical contact MW scanning device may not be generally accepted by public Iris recognition recording of iris using standard video technology Advantages Non-invasive procedure close physical contact not required Disadvantages Relatively expensive requires large amount of computer storage may not be generally accepted by public Finger imaging recording of fingerprint using optical scanner Advantages Widely accepted by public and law enforcement communities as reliable identification Disadvantages Requires close physical contact with scanning device residue on finger may cause recognition problems has criminal overtones Hand geometry three-dimensional recording of length width and height of hand and fingers using optical scanner Advantages User-friendly requires small amount of computer storage space Disadvantages Isnt as unique as other biometric methods hand injury can cause recognition problems Facial thermography or imaging photograph of face converted into digital code Advantages Non-invasive procedure Disadvantages People who look alike can fool scanner people can alter their appearance and facial hair can fool device Voice verification or recognition acoustic signal of voice converted into digital code Advantages Works well over the telephone Disadvantages Requires large amount of computer storage peoples voices can change background noises can interfere Signature recognition computer record of penstylus speed pressure direction and other characteristics of signature Advantages People are used to providing a signature Disadvantages Poor long-term reliability accuracy difficult to ensure
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