We all have heard about Finger Print Scanning Technology. In recent post i have already told you that Apple is using this technology in there latest iPhone 5S. Well now it's time to check what this technology is all about. How does Finger Print Scanner Works. It's time to Look Inside Surf.
There are two major technologies used for fingerprint authentication—electro-optical and capacitance. EO scanners work a lot like a traditional scanner does: they use bright lights to illuminate the peaks and valleys of the print and a CCD device to capture a black and white image—white areas are peaks, dark areas are valleys. A computer algorithm then compares the pattern of light-dark intersections, known as minutiae (ie where two ridges meet or a ridge splits), in this image to one already on file for the individual. If enough intersections match, the identity is considered verified and access is granted.
Is iPhone Using Same Technology ?
Yes!! The new iPhone 5S uses the more sensitive capacitance method. Instead of bouncing light off the print to generate a binary representation, this method relies on an array of minuscule capaciative cells, each less than a finger ridge wide. These cells consist of two conductor plates separated by an insulating layer.
Put your finger on the capaciative scanner and the ridges will cause some plates to come into contact, thereby closing a circuit and generating current, while the cells under the ridges on your fingers remain separate. The system then interprets the voltages generated by each cell to determine which one is under a ridge and which is under a valley. By combining this data the scanner can generate an overall image of the print, much as an EO scanner would, but with a much higher degree of fidelity. Another advantage is that capacitance scanners require an actual fingerprint shape to work, not just a light-dark pattern, which makes them harder to spoof. This is How iPhone is even more Safer .
There are two major technologies used for fingerprint authentication—electro-optical and capacitance. EO scanners work a lot like a traditional scanner does: they use bright lights to illuminate the peaks and valleys of the print and a CCD device to capture a black and white image—white areas are peaks, dark areas are valleys. A computer algorithm then compares the pattern of light-dark intersections, known as minutiae (ie where two ridges meet or a ridge splits), in this image to one already on file for the individual. If enough intersections match, the identity is considered verified and access is granted.
Is iPhone Using Same Technology ?
Yes!! The new iPhone 5S uses the more sensitive capacitance method. Instead of bouncing light off the print to generate a binary representation, this method relies on an array of minuscule capaciative cells, each less than a finger ridge wide. These cells consist of two conductor plates separated by an insulating layer.
Put your finger on the capaciative scanner and the ridges will cause some plates to come into contact, thereby closing a circuit and generating current, while the cells under the ridges on your fingers remain separate. The system then interprets the voltages generated by each cell to determine which one is under a ridge and which is under a valley. By combining this data the scanner can generate an overall image of the print, much as an EO scanner would, but with a much higher degree of fidelity. Another advantage is that capacitance scanners require an actual fingerprint shape to work, not just a light-dark pattern, which makes them harder to spoof. This is How iPhone is even more Safer .
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