Finger vein authentication technology access control system application (1)

Biometric technology overview

As the Internet and the rapid development of information technologies, the trends in the global economic integration, the protection of personal information is even more important, how to choose a reasonable authentication technology to ensure the necessary elements of information security.

Early authentication technology is based on the personal password, and password cracking or sneak peek of probability higher and higher, and later appeared the intelligent IC card, but this authentication method is also being copied or stolen security risk.

Biometric authentication technology will drive the next several years an important change in the IT industry, such technology by the computer using the human body's inherent physiological characteristics or behaviour characteristics distinguishing personal identity.

Biometric identification, including fingerprints, iris recognition, face recognition, vein recognition PalmPrint identification, voice recognition, signature recognition, handwriting recognition, hand recognition and a wide variety of biometric identification, and other classes that biometric technology has not forgotten and lost, it is difficult to counterfeit and stolen, you can "carry", anytime, anywhere, etc., have been all over the world are concerned about, and apply to authentication, access management, security monitoring, e-commerce, e-Government, etc.

Throughout the history of the biometric technology, the 1960s, the United States suggested using computer image processing and pattern recognition methods for fingerprint analysis to replace manual comparison, this is the original fingerprint recognition technology.

From the 1990s onwards, the Palm shape recognition, face recognition, iris recognition products have also come to market, although each authentication technology has its own advantages and disadvantages, but also occupy a certain market share.

With the finger vein biometric authentication products released in the market, representing the field of bio-certification of a new technology was born.

Means the vein authentication technology through the finger vein image in the living skin identification to achieve certification purposes, high security, recognition rate, easy-to-use, these advantages enable their rapid was the market recognition. Finger vein recognition technology is widely used in the financial system, access control systems, computer security etc.

Finger vein authentication system principle

Medical research has proven that the finger vein of shape is unique and stability, that is, each person's finger vein image are not the same, the same person different finger vein image is not the same, healthy adult finger vein shape no longer change.

Certification is divided into the following four steps:

1, vein scanning: LED transmit the finger side, near infrared transmittance finger, fingers of the other party, camera vein image;

2, image correction: adjust the image position and angle, bringing it in line with the certification specifications;

3, feature extraction: based on the above image, image extraction, vein distribution characteristics diagram (see Figure 2);

4, image contrast and matching: these are the characteristics of the diagram and the database is compared to the original template, calculating relevance.

If you match the authentication through the authentication, do not match.

Finger vein authentication benefits more

Existing biometric authentication key with the fingerprint recognition, iris recognition, facial recognition technology, and signature recognition, voice recognition technology, the Palm-recognition technology, finger vein recognition technology for Palm vein recognition technology, bio certification despite its inherent advantages, but also to each type of recognition has its shortcomings, respectively.

As a high security, use the convenient authentication method, finger vein authentication technology has some differences from other biometric authentication technology features:

1, high safety

Finger vein authentication system principles is matching finger internal venous lines map.

Because the vein is hidden inside the finger and therefore extremely difficult to copy, and steal, and other in vitro using human characteristics certified technology, this form of security. At the same time, the vein authentication can sense the fingers of the blood flow and blood pressure conditions, to be able to identify the process both in vivo testing.

2. accuracy

Sample-sample is in the human body, so the matching process is a very small external interference.

Finger vein authentication accuracy is high, according to strict medical certification and mathematical statistics, FRR (rejection of real rate) less than 0.01%, FAR (false acceptance rate) less than 0.0001% FTE (login failed) is 0%.

3. uniqueness

According to medical evidence, the different between the finger vein distribution completely different, left hand and right hand vein distribution are also different, even if the same finger are twins, one of the venous distribution is different.

And finger vein of grain distribution in adulthood will not change. For minors, when their finger vein changes with age, the only takes 30 seconds to complete the registration again.

4, non-contact type

Relative to some the biometric technology, finger vein recognition technology is non-contacting, would be more in public health.

5, small sample files

Because the finger vein is relatively stable and very easy to shoot down, so using low-resolution camera can achieve sampling requirements.

This generated vein template file small, matching speed.

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