Which of the following biometric devices offers the LOWEST CER?
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A. B. C. D.C.
From most effective (lowest CER) to least effective (highest CER) are: Iris scan, fingerprint, voice verification, keystroke dynamics.
Reference : Shon Harris Aio v3 , Chapter-4 : Access Control , Page : 131 Also see:http://www.sans.org/reading_room/whitepapers/authentication/biometric-selection-body-parts-online_139
Biometric devices are used to authenticate a user's identity based on their unique biological characteristics, such as fingerprints, voice, and iris patterns. The accuracy of a biometric device is measured by its CER (Crossover Error Rate), which is the point at which the False Acceptance Rate (FAR) equals the False Rejection Rate (FRR).
The lower the CER, the more accurate the biometric device is at identifying users. Among the given options, the biometric device that offers the lowest CER is iris scan.
Here's a brief explanation of the other options:
A. Keystroke dynamics: This biometric device captures the way a user types on a keyboard, including speed, rhythm, and keystroke duration. Keystroke dynamics can be affected by various factors, such as the user's typing speed, keyboard layout, and physical condition, making it less reliable than other biometric devices. The CER of keystroke dynamics is typically higher than that of other biometric devices.
B. Voice verification: This biometric device analyzes the user's voice pattern, pitch, tone, and accent to authenticate their identity. However, voice verification can be affected by various factors, such as background noise, voice changes due to illness or age, and language barriers. The CER of voice verification is typically higher than that of iris scan.
D. Fingerprint: This biometric device captures the user's fingerprint pattern and compares it to the database to authenticate their identity. Fingerprint recognition is a widely used biometric device, but it can be affected by various factors, such as the user's skin condition, the quality of the scanner, and the cleanliness of the user's fingers. The CER of fingerprint recognition is typically higher than that of iris scan.
In conclusion, among the given options, iris scan offers the lowest CER and is considered one of the most reliable biometric devices for authentication purposes.