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TOPIC: COMPUTER ETHICS AND LEGAL ISSUES - page 12 / 17

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-Involves the scanning of retina and analysis the layer of blood vessels at the back of the eye.

-Requires the user to remove glasses, place their eye close to the device and focus on a certain point. Whether than accuracy can out weight the public discomfort is yet to be seen.

Voice Recognition

-Voice recognition system compares a person's live speech with their stored voice pattern.

-Requires user to speak into a microphone. What he speaks can be his password or an access phrase.

Signature Verification System

-Signature verification system recognizes the shape of your handwritten signature, as well as measuring the pressure exerted and the motion used to write the signature.

-Uses special pen and tablet. After pre-processing the signature, several features are extracted.

-The authenticity of a writer is determined by comparing an input signature to a stored reference set (template) consisting of three signatures.

2) Callback System

-Callback System refers to the checking system that authentication the user.

-The Callback System is commonly used in the bank operation and business transaction.

-For example, when you book for the taxi service, the operator will ask you to hang up and she will call you back to confirm for the service required.

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