• Title/Summary/Keyword: fingerprint sensor

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Smart Optical Fingerprint Sensor for Robust Fake Fingerprint Detection

  • Baek, Young-Hyun
    • IEIE Transactions on Smart Processing and Computing
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    • v.6 no.2
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    • pp.71-75
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    • 2017
  • In this paper, a smart optical fingerprint sensor technology that is robust against faked fingerprints. A new lens and prism accurately detect fingerprint ridges and valleys that are needed to express a fingerprint's intrinsic characteristics well. The proposed technology includes light path configuration and an optical fingerprint sensor that can effectively identify faked fingerprint features. Results of simulation show the smart optical fingerprint sensor classifies the characteristics of faked fingerprints made from silicone, gelatin, paper, and rubber, and show that the proposed technology has superior detection performance with faked fingerprints, compared to the existing infrared discrimination method.

Design of Circuit for a Fingerprint Sensor Based on Ridge Resistivity

  • Jung, Seung-Min
    • Journal of information and communication convergence engineering
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    • v.6 no.3
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    • pp.270-274
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    • 2008
  • This paper proposes an advanced signal processing circuit for a fingerprint sensor based on ridge resistivity. A novel fingerprint integrated sensor using ridge resistivity variation resulting from ridges and valleys on the fingertip is presented. The pixel level simple detection circuit converts from a small and variable sensing current to binary voltage out effectively. The sensor circuit blocks were designed and simulated in a standard CMOS 0.35 ${\mu}m$ process.

An Efficient Selective Encryption of Fingerprint Images for Embedded Processors

  • Moon, Dae-Sung;Chung, Yong-Wha;Pan, Sung-Bum;Moon, Ki-Young;Chung, Kyo-Il
    • ETRI Journal
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    • v.28 no.4
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    • pp.444-452
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    • 2006
  • Biometric-based authentication can provide a strong security guarantee of the identity of users. However, the security of biometric data is particularly important as any compromise of the biometric data will be permanent. In this paper, we propose a secure and efficient protocol to transmit fingerprint images from a fingerprint sensor to a client by exploiting the characteristics of the fingerprint images. Because the fingerprint sensor is computationally limited, a standard encryption algorithm may not be applied to the full fingerprint images in real-time to guarantee the integrity and confidentiality of the fingerprint images transmitted. To reduce the computational workload on the resource-constrained sensor, we apply the encryption algorithm to a nonce for integrity and to a specific bitplane of each pixel of the fingerprint image for confidentiality. Experimental results show that the integrity and confidentiality of the fingerprint images can be guaranteed without any leakage of the fingerprint ridge information and can be completed in real-time on embedded processors.

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Development of Mirror-based touchless fingerprint sensor (거울을 이용한 비접촉식 지문 센서 개발)

  • Choi, Hee-Seung;Choi, Kyung-Taek;Kim, Jai-Hie
    • Proceedings of the IEEK Conference
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    • 2007.07a
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    • pp.231-232
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    • 2007
  • This paper introduce a new touchless fingerprint sensor. Two mirrors are used to capture the side fingerprint images which cannot detectable using a single camera. We also propose the techniques which can solve the image contrast, nonuniform illumination, DOF(Depth of Field) problems. This new sensor leads to bringing new challenges in the field of fingerprint recognition.

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Circuit Design of Fingerprint Authentication for Smart Card Application (스마트카드의 인증을 위한 지문인식 회로 설계)

  • 정승민;김정태
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2003.05a
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    • pp.249-252
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    • 2003
  • This paper propose an advanced circuit for fingerprint sensor signal processing. We increased the voltage between ridge and valley by modifying the parasitic capacitance eliminating circuit of sensor plate. The analog to comparator was designed for comparing the sensor signal voltage with the reference signal voltage. We also propose an exective isolation strategy for removing noise and signal coupling of each sensor pixel. The 128$\times$144 pixel fingerprint sensor circuit was designed and simulated, and the layout was performed.

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A Robust Resistive Fingerprint Sensor

  • Jung, Seung-Min
    • Journal of information and communication convergence engineering
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    • v.7 no.1
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    • pp.66-71
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    • 2009
  • A novel sensing scheme using resistive characteristics of the finger is proposed. ESD problem is more harmful than a capacitive fingerprint sensor in a resistive fingerprint sensor, because the sensor plate is directly connected to the sensing cell. The proposed circuit is more robust than conventional circuit for ESD. The sensor plate and sensing cell are isolated by capacitor. The pixel level simple detection circuit is fully digital operation unlike that of the capacitive sensing cell. The sensor circuit blocks are designed and simulated in a standard CMOS $0.35{\mu}m$ process. The proposed circuit is more stable and effective than a typical circuit.

A Circuit Design of Fingerprint Authentication Sensor (지문인식센서용 회로설계)

  • 남진문;정승민;이문기
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.29 no.4A
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    • pp.466-471
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    • 2004
  • This paper proposes an advanced circuit for fingerprint sensor signal processing. We increased the voltage between ridge and valley by modifying the parasitic capacitance eliminating circuit of sensor plate. The analog comparator was designed for comparing the sensor signal voltage with the reference signal voltage. 1-Pixel Fingerprint sensor circuit was designed and simulated, and the layout was performed.

A Double-Sided Fingerprint Sensing Method (양면 지문 입력 방법)

  • Shim, Jae-Chang;Kim, Seong-Young;Choi, Mi-Soon;Kim, Ik-Dong
    • Journal of Korea Multimedia Society
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    • v.11 no.3
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    • pp.323-330
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    • 2008
  • In this paper, we propose a new fingerprint sensing method that can reduce orientation error. General fingerprint input methods need finger to be put on the surface of a sensor. It can cause of rotation problem and it affects the recognition result significantly. This improved input method can minimize the rotation of a finger by holding double-sided sensor with both thumb and index finger at the same time. Whenever fingerprint is impressed, it has nearly the same orientation because sensors are located between two fingers. As a result, we can get a better performance in fingerprint recognition system, but it may need more hardware cost.

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A Detection Method of Fake Fingerprint in Optical Fingerprint Sensor (광학식 지문센서에서의 위조 지문 검출 방법)

  • Lee, Ji-Sun;Kim, Jae-Hwan;Chae, Jin-Seok;Lee, Byoung-Soo
    • Journal of Korea Multimedia Society
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    • v.11 no.4
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    • pp.492-503
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    • 2008
  • With the recent development and increasing importance of personal identification systems, biometric technologies with less risk of loss or unauthorized use are being popularized rapidly. In particular, because of their high identification rate and convenience, fingerprint identification systems are being used much more commonly than other biometric systems such as iris recognition, face recognition and vein pattern recognition. However, a fingerprint identification system has the problem that artificially forged finger-prints can be used as input data. Thus, in order to solve this problem, the present study proposed a method for detecting forged fingerprints by measuring the degree of attenuation when the light from an optical fingerprint sensor passes through the finger and analyzing changes in the transmission of light over stages at fixed intervals. In order to prove improvement in the performance of the proposed system, we conducted an experiment that compared the system with an existing multi-sensor recognition system that measures also the temperature of fingerprint. According to the results of the experiment, the proposed system improved the forged fingerprint detection rate by around 32.6% and this suggests the possibility of solving the security problem in fingerprint identification systems.

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Design of a Fingerprint Authentication Sensor with 128${\times}$144 pixel array (128${\times}$144 pixel array 지문인식센서 설계)

  • 정승민;김정태;이문기
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.7 no.6
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    • pp.1297-1303
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    • 2003
  • This paper propose an advanced circuit for fingerprint sensor signal processing. We increased the voltage between ridge and valley by modifying the parasitic capacitance eliminating circuit of sensor plate. The analog comparator was designed for comparing the sensor signal voltage with the reference signal voltage. We also propose an effective isolation strategy for removing noise and signal coupling, ESD of each sensor pixel. The 128${\times}$l44 pixel fingerprint sensor circuit was designed and simulated, and the layout was performed.