Intelligent security technology upgrade fingerprint security into the industry hot

Anti-theft door to enter millions of households, but the lock on the security door is a variety of attitudes. From the early mechanical locks to the modern electronic locks and smart locks, and to the new generation of smart locks represented by fingerprint recognition, that is, fingerprint locks, which have developed rapidly in recent years, the development of science and technology and industrial penetration have also triggered locks. The revolution in the industry has brought users a wonderful experience and enjoyment of high-quality life, work, and entertainment from the aspects of safety, convenience, and management.

Fingerprint lock needs fingerprint lock as the third generation of security products, breaking the traditional sense of mechanical lock single door opening function, is a set of optical, mechanical, electronic and fingerprint core algorithm technology as a high-tech products. Fingerprint locks now have a lot of features, such as networking, open-door recording, remote control, smart alarm, multiplayer mode, and administrator level. These are closely linked with the IT industry's electronic information technology. With the continuous improvement of people’s security awareness, living standards and demand, new functions and new demands are also emerging. At the same time, they are also required by the functional agencies of the state government and there are many related requirements.

In addition, there are special requirements for the linkage system of the banking system, the three linkage doors of the vault, fingerprint gun cabinets, taxation systems, prisons, health care, education systems, and examination systems.

Fingerprint lock core technology analysis Fingerprint lock As a high-tech electronic information product, the following core technology research is the focus of development:

1. Fingerprint recognition algorithm: At present, the identification algorithm of our company's fingerprint products is completely the core algorithm of our company's own intellectual property rights, and the corresponding technical indicators have reached the world's leading position, among which: false-false rate (false recognition rate) :<0.0001%: one millionth, that is, the chance of accidental unlocking; refusal rate: <0.3%: three-thousandths, that is, the chance of refusing to unlock after storing fingerprints; rotation angle: plus or minus 180 degrees , that is, can rotate 360 ​​degrees; maximum translation: 5mm; recognition time: <0.2s, fingerprint comparison processing time.

2. Optical acquisition instrument: Among the numerous fingerprint acquisition sensors, the optical acquisition system is the most reliable, adaptable to various occasions, and is resistant to damage and has a long life. And now there are two products (bright and dark backgrounds), fingerprint lock products that are applied after rigorous testing. The acquisition equipment has the following key technical indicators: Resolution (number of pixels): refers to the number of pixels per inch (dpi). The standards of the FBI and the Ministry of Public Security of China must not be less than 500dpi for police use and some commercial equipment; if less than this value, adjacent fingerprint lines cannot be clearly distinguished on the image, resulting in the feature extraction algorithm being unable to locate feature points. Area Size: The size of a rectangular area that is effective for obtaining a fingerprint image. The larger area size can obtain larger fingerprint images, provide more fingerprint ridge lines and valley lines, so that the clear identification and resolution are easier. The size of the current optical collection instrument is: 18*22mm, and it can completely guarantee 500dpi. (actually 508dpi); grayscale: the number of bits per grayscale value in the image, that is, the A/D conversion accuracy, the FBI standard requires 8 bits, but our product is 256 grayscale, which guarantees the acquisition Out of the lines can be clearly reflected. Geometric Accuracy: Geometric distortion of the acquisition device, expressed as a relative percentage, which we professionally refer to as geometric accuracy or distortion. In most optical collection system systems, this problem will occur. For example, systems using prisms may have trapezoidal distortion, rectangular distortion, etc., but they can be corrected by optical system compensation. If the correction is not compensated, it will cause different positions on the surface of the collector. The inconsistent deformation of the fingerprint image will affect the identification of the fingerprint; if the image needs to be uploaded to the computer system, the image will be distorted. If the distorted parameters cannot be controlled when the production is caused, the fingerprint identification system cannot be locked in the network identification system. Identifying images acquired by other locks has caused networked fingerprint identification systems to fail.

Fingerprint recognition integrated theory fingerprint recognition technology is a kind of biometric identification technology; it is well known that biometric identification technology is a solution that depends on the body's physical characteristics to perform identity verification. The human body's biological characteristics include fingerprints, human faces, sounds, irises, corneas, palm prints, skeletons, veins, etc., signatures of behaviors, voices, button strengths, exercise postures, etc., as well as forensic medicine. Blood, DNA, etc. are all characteristics of the body. The core of the so-called biometrics is how to obtain these biometrics, convert them into digital information, and store them in memory. The microprocessor uses a reliable matching algorithm to complete the process of verifying and identifying individuals.

Due to the human body's unique and non-replicable uniqueness, the biological key cannot be copied, stolen or forgotten. Common passwords, IC cards, barcodes, magnetic cards, or keys have many unfavorable factors such as loss, forgetting, copying, and theft. Therefore, using biological "keys", you do not need to carry a large number of keys, and do not bother to remember or change the password. And system administrators don't have to do anything to forget passwords.

The effectiveness and convenience of humans in the pursuit of security protection for documents, transactions, and goods have experienced three stages of development. The first stage, which is the initial method, is to use all kinds of mechanical keys that we are already familiar with. The second stage is the development of mechanical keys to digital keys such as passwords, barcodes, IC cards, IB cards, radio frequency cards, and remote controls. The third stage is to use the inherent biological characteristics of the human body to identify and verify the identity. Biometrics is the highest-level security key system in digital life today.

In current biometric technologies, fingerprint recognition is the easiest to develop, and it is also the most mature biometric identification technology. Its application is also the most extensive. Fingerprints are very much in line with the requirements of biometric systems in terms of relativity and stability. According to the statistics of the International Biometrics Group IBG, fingerprint identification has taken the lead in the biometrics market. It accounts for 80% of the biometric market.