Fingerprints have long been recognized as an easy way to distinguish between individuals. Retinal scans and face shape have also good potential. The problem with entering in passwords is that people tend to choose passwords that too simple. A simple flip of a finger provides a unique set of data that is much more secure.

Biometrics takes advantage of your unique characteristics. Supposedly you are the only one with your fingerprints, voice, retinal patterns, iris, palmprint, face, etc. In theory, those characteristics can be used to uniquely identify you and access to rooms, computer systems, etc. can be granted or denied based on whether you are really you. This contrasts with other methods of access control - something you know (like username/password, PIN, etc.) and something you have (smart-card, magnetic key, physical key, token, etc.).

In theory, no one else has all your biometric characteristics, but someone could possibly learn your password or steal your smartcard. In that respect biometrics are supposed to be more secure than the other methods. In practice, biometrics are still somewhat prone to both false positive and false negative failures. Most biometric identification methods can still be fooled at least some of the time by a very skillful intruder. For these reasons, when reliable authentication is very important, 2-factor or even 3-factor authentication is recommended, with biometric authentication being one of the authenticating factors.

There are several biometric devices that do not require the person being identified to touch anything. Retinal and iris scanners do not necessarily require the person to touch anything. Facial recognition also usually does not require the individual to touch anything. The types of biometrics that require touching usually are focused on the hands or fingers or on something the hands or fingers do like keystroke patterns or signatures.

Splicing Attack

Biometric system is more useful than manual registering system. Attendance is tracked through software and then we can monitor easily so that we can save more time from put a signature in a register by standing in a queue.

The most accurate type of Biometrics is Retina Scanning. It is almost 100% accurate. Along with the Iris, you can't change the information held in the patterns in your eye. But people can wear colored contacts, which would throw off the Iris scanning process. So in conclusion, the Retina Scanning is most accurate.

The influence of biometric devices on either security or privacy will depend upon how they are used. Like any other device, biometric devices can be used appropriately or inappropriately. Does the use of a knife make you bleed to death? But then, maybe you will just chop vegetables.

However we know that this is a time saving and useful for every company. Its main aim is to keep an eye on employees their login and logout.

Biometrics refers to the identification of humans by their characteristics or traits.

Biometric identifiers are often categorized as physiological or behavioral characteristics.

Fingerprints, face recognition, DNA, Palm prints, hand geometry, iris recognition, retina and scent are examples of physiological characteristics.

Behavioral characteristics (behaviometrics to some researchers) are related to the pattern of behavior of a person, and includes typing rhythm, gait, and voice.

To accomplish biometric objectives, methods such as requiring your fingerprint to be on credit cards or even requiring it to be scanned for purchases, use of voice recognition devices, or collecting your DNA can be used. However, there are privacy concerns about using these methods.

Yes, biometrics can be related to speech recognition. Speech recognition is a type of biometric technology that analyzes an individual's vocal patterns to identify them. By using speech as a biometric identifier, systems can verify a person's identity based on how they speak.