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Retinal Scanning

Retinal Scanning . by the Man, the Myth, the Legend Justin Thompson. Overview. What is retinal scanning? How does it work? Uses Advantages Disadvantages Overview Commentary. Retinal Scanning. Original idea in 1935 from Dr. Carleton Simon and Dr. Isodore Goldstein

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Retinal Scanning

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  1. Retinal Scanning by the Man, the Myth, the Legend Justin Thompson

  2. Overview • What is retinal scanning? • How does it work? • Uses • Advantages • Disadvantages • Overview • Commentary

  3. Retinal Scanning • Original idea in 1935 from Dr. Carleton Simon and Dr. Isodore Goldstein • Patterns of blood vessels in the back of the eye were individual to each human, even twins • Not only unique to each individual, but also unique to each eye • Eyedentify, founded in 1976, made the first commercial retinal scanner for commercial use in 1984

  4. How it Works • Low intensity infrared light is projected to the back of the eye onto the retina • Infrared is used because the blood vessels absorb it more readily than the other tissues in the eye • The infrared light is reflected back to the camera • The retina is transparent to infrared, so some scanners also use visible light to make the retina show up • The user has to keep still fairly close to the scanner for up to 15 seconds without blinking

  5. How it Works Cont’d • Enrollment can take as many as 5 scans of an eye • As many as 400 data points are collected for a template • 3 methods of recognition • Database searching • Declaration/match • Submit/validate

  6. Database Searching • The user is scanned and a template is created • That template is compared to the database of enrolled individuals • If there is a match, the user is informed of whom he/she is

  7. Declaration/Match • The user declares who they are before submitting to a scan • The database only checks the scan to the template of the person the user declares to be • Provides for quicker response times

  8. Submit/Validate • The user’s retina is scanned, then is prompted with some other form of identification, such as a PIN or password • In some systems a combination of these items is used to create the presentation template • In others, it is used to ensure that the matched template is correct by comparing the entered PIN or password to the enrolled one matching the appropriate retina scan template

  9. Uses • High security access • Military • Financial institutions • FBI • CIA • NASA

  10. Advantages • The retina is a permanent structure, staying the same from birth to death • Can be considered impossible to alter • Very hard to fake • Decays quickly after death • Really low false positive and false negative rates

  11. Disadvantages • Expensive • Very intrusive • Can’t move during scan • The retina is susceptible to disease damage, such as cataracts, glaucoma, diabetes, and degenerative retina • High amount of both user and operator skill required • Not enough funding • Has the stigma that people think it is harmful to the eye

  12. Conclusion • Retina scanning is one of the most accurate biometrics with a very low error rate. Unfortunately, because it is invasive and expensive, it might not be very commonly used in the near future

  13. Questions?

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