Biometrics and its use: Viewpoint

Commercial sectors increasingly using biometrics to secure their authentication process, and verified transactions. Some example applications include ATM booths, credit cards, facility access, network login, online service and data access. Healthcare and medical science extensively use various forms of biometrics (external and internal) for blood transfusion, organ matching, identification of biological parents, ancestry, etc.


Opinion
Biometric is a combination of two Greek words, namely Bio (life) and Metric (to measure). Biometrics has been used for many purposes including identification of human, in particular, recognition of an individual through physiological and behavioral traits or attributes.

Physical biometrics
It includes physical characteristics of human such as the appearance, body structures, and other aspects. Computational algorithms are used to extract various biometric characteristics such as 2D ridge-valley maps in fingerprints, face image, audio recordings of the voice, near-infrared images of the iris, video of gait motion, etc.

Behavioral biometrics
Are those which are related to the behavior (in certain aspects) of an individual. Hence, such biometrics verification can prevent a person from authenticating/accessing if his behavior is different from the stored behavioral pattern/profile. The examples of this type of biometrics are-voice, keystroke analysis, mouse dynamics, signature, etc.

Law enforcement
Police departments use fingerprint identification systems to identify criminals or fugitives; forensic applications also use biometric to expedite or validate the investigation process.

Governments
Different branches of the government or federal agencies use biometrics to identify citizens and foreign nationals. Some of the examples are driving license, national ID card, social security card, border control, passport, visitor-visa program, etc.

Business
Commercial sectors increasingly using biometrics to secure their authentication process, and verified transactions. Some example applications include ATM booths, credit cards, facility access, network login, online service and data access. Healthcare and medical science extensively use various forms of biometrics (external and internal) for blood transfusion, organ matching, identification of biological parents, ancestry, etc.
Different biometrics is used primarily in two spaces: realworld physical verification of human and increasingly used for cyber-identity, authentication and authorization of legitimate access to the computing systems and services. In cyber space, identity verification is always challenging, since in many instances, it is not possible to know who is on the other side of a virtual communication. Specifically, it is difficult to verify legitimate user identity (from Spoofed) with cent percent accuracy in both biometric or none biometric authentication processes. To alleviate the situation, multi-factor authentication is becoming essential for important transactions and services on the Internet [4,5].
Similarly, in our real-world, physical biometric verifications are also facing major challenges due to many reasons such as: Physical biometrics may change over time due to natural, accidental or advertent changes (e.g. in fingerprints) II. Some type of physical biometrics such as appearances may change because of fashion or makeover (e.g. color contact lenses, hair color and cosmetics, etc.) III. Physical biometrics may get changed due to surgery, skin drafting, nose implant, face lifting, anti-aging skin repair, amputation, botox, etc.

Biostatistics and Biometrics Open Access Journal
Due to the above-mentioned factors and technological advancements of appearance and shape shifting, it is quite difficult to accurately identify human by physical attributes as these can be easily altered now.
Furthermore, if we consider the above-mentioned factors as external biometrics, internal biometrics is also emerging for human identity verification. Forensic science is now going deeper inside human body to identify a person using internal characteristics, such as body pressure, blood type, pulse rate, assuming that these are inert and hard to change, though these require intrusive measurements and can undergo changes during stress and sickness [3]. In addition, organ transplant, blood transfusion, immunotherapy and hormone therapy may influence the internal biometrics of the body; also recently reported that 7% percent of DNA has changed to an astronaut after spending a yearlong in the space shuttle [6,7].

Searching for true identity
If the purpose of biometric use are to check the human behavior (good, bad, harmful, harmless, authentic, non-authentic facts) then the focus should be on the brain, which is irreplaceable and controls human behavior [6]. Accordingly, human identity is reflected through expressions of human mind that can be seen by how the person behaves in different contexts and situations. If we can precisely capture, the manifestation of brain activities or mind change (if it is the expression of brain function), we may reach a more accurate representation of a human's identification. A mind reader can interpret the state of mind from the changes in brain's electrochemical signals and can determine the true identity of a human and his actions.
Researchers developed a biometric Brainprint system [4] to identify individuals with 100% accuracy measuring their EEG signals that represent their brain activities. In general, every individual's brain react in a different manner to a same set of images. Hence, the brain activities through EEG signals are able to identify every brainprint (in other words, individuals) with absolute accuracy. A brainprint of an individual is recorded by having a user look at an image while hooked up to an electroencephalograph that captures his/her brain activity in response to the stimulus. This step basically the registration phase for the biometric modality. During authentication phase, the user's identity would be verified by exposing her to the stimulus again, recording her current response and using different pattern recognition algorithms to compare the registered EEG data with authentication EEG data. This biometric based system has the great potential to be deployed in high security based system, where 100% accuracy is an absolute need.

Use of biometric beyond identity science
Biometric analytics refers to the discovery of useful patterns within biometric signals to ascertain potentially interesting information about a person other than identity, such as emotional state or longevity [6]. For example, voice recognition is used to better understand a speaker's emotional state, honesty, concentration level, and other attributes to define a person's character and personality. Monitoring audience facial reactions such as detecting smiles, confusion, boredom or distress while watching video can help editing movies, or developing higher impact advertising. Also face analytics software, developed to digitize emotion, age estimation in determining longevity which will have implications in the cosmetics and rejuvenation industries. To conclude, with further understanding of how brain works, technological advances may come to help human using augmented artificial brain (robot) in making decisions for or on behalf of them. It will be interesting to envision the type of biometrics to be used in future for human identity.