Abstract
In this paper, we review the Noisy password, Voiceprint biometric and One-Time-Password. The most common method used for authentication is static passwords. The traditional passwords are vulnerable to dictionary attacks, shoulder surfing and eves dropping. The noisy passwords can be used as an alternative to the static password. The noisy password attempts to mitigate above mentioned problems. The biometric technique like fingerprints, palm-vein scan, etc. can be used for personal recognition. But as compared to other biometric, Voiceprint requires less implementation cost. E-commerce application uses One-Time-Password to perform E-transaction. Hence it becomes necessary to provide security while transmitting the OTP.
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