• Title/Summary/Keyword: 일회성시스템

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Handwritten One-time Password Authentication System Based On Deep Learning (심층 학습 기반의 수기 일회성 암호 인증 시스템)

  • Li, Zhun;Lee, HyeYoung;Lee, Youngjun;Yoon, Sooji;Bae, Byeongil;Choi, Ho-Jin
    • Journal of Internet Computing and Services
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    • v.20 no.1
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    • pp.25-37
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    • 2019
  • Inspired by the rapid development of deep learning and online biometrics-based authentication, we propose a handwritten one-time password authentication system which employs deep learning-based handwriting recognition and writer verification techniques. We design a convolutional neural network to recognize handwritten digits and a Siamese network to compute the similarity between the input handwriting and the genuine user's handwriting. We propose the first application of the second edition of NIST Special Database 19 for a writer verification task. Our system achieves 98.58% accuracy in the handwriting recognition task, and about 93% accuracy in the writer verification task based on four input images. We believe the proposed handwriting-based biometric technique has potential for use in a variety of online authentication services under the FIDO framework.

Differential Effects of Acute and Chronic Exercise on Autophagy-related Gene Expression in Drosophila melanogaster (일회성 및 만성적 유산소운동이 초파리의 자가포식 관련 유전자 발현에 미치는 영향)

  • Kim, Hee Yeon;Kim, Hye Jin;Hwang, Ji Sun;Lee, Won Jun
    • Journal of Life Science
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    • v.24 no.11
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    • pp.1180-1186
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    • 2014
  • Autophagy, the lysosomal degradation pathway, is an intracellular recycling system that is necessary for the metabolic benefits of exercise and for producing lasting beneficial effects of exercise in various diseases. However, the most recent studies have only examined the effect of a single bout of exercise or resistance exercise on autophagic responses. To determine the differential effects of acute and chronic exercise on the expression of autophagy-related genes in D. melanogaster, white-eyed mutant D. melanogaster were assigned randomly to four groups: control, acute exercise, 2 hr chronic exercise, and 3 hr chronic exercise. The flies were exercised using a mechanized platform known as the Power Tower. Our results revealed that a single bout of exercise resulted in increased mRNA levels of the Atg8a gene (~20%, p<0.05). However, Atg1 and Atg6 mRNA expression were not induced by acute exercise. Transcript levels of Atg6 (~29%, p<0.05) related to the nucleation of autophagosomes were significantly induced by 2 hr of chronic exercise. However, this chronic exercise was not enough to increase Atg1 and Atg8a mRNA expression. On the other hand, 3 hr of exercise for 7 days significantly increased Atg1, Atg6, and Atg8a gene expression-about 57%, 37%, and 71%, respectively (p<0.05). These results suggest that a single bout of exercise is not enough to induce full activation of selected autophagy-related genes in D. melanogaster. Our results demonstrated that chronic regular exercise induced autophagy-related gene expression, suggesting that chronic regular exercise training might be required to activate autophagic responses important for producing beneficial effects of exercise in various diseases.

Development of a Storage-Reliability Estimation Method Using Quantal Response Data for One-Shot Systems with Low Reliability-Decreasing Rates (미소한 신뢰도 감소율을 가지는 원샷 시스템의 가부반응 데이터를 이용한 저장 신뢰도 추정방법 개발)

  • Jang, Hyun-Jeung;Son, Young-Kap
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.35 no.10
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    • pp.1291-1298
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    • 2011
  • This paper proposes a new reliability estimation method for one-shot systems using quantal response data, which is based on a parametric estimation method. The proposed method considers the time-variant failure ratio of the quantal response data and it can overcome the problems in parametric estimation methods. Seven reliability estimation methods in the literature were compared with the proposed method in terms of the accuracy of reliability estimation in order to verify the proposed method. To compare the accuracy of reliability estimation, the SSEs (Sum of Squared Error) of the reliability estimation results for the different estimation methods were evaluated according to the various numbers of samples tested. The proposed method provided more accurate reliability estimation results than any of the other methods from the results of the accuracy comparison.

Improved RFID Mutual Authentication Protocol using One-Time Pad and One-Time Random Number Based on AES Algorithm (OTP와 일회성 난수를 사용한 AES 알고리즘 기반의 개선된 RFID 상호 인증 프로토콜)

  • Yun, Tae-Jin;Oh, Se-Jin;Ahn, Kwang-Seon
    • Journal of the Korea Society of Computer and Information
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    • v.16 no.11
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    • pp.163-171
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    • 2011
  • Because RFID systems use radio frequency, they have many security problems such as eavesdropping, location tracking, spoofing attack and replay attack. So, many mutual authentication protocols and cryptography methods for RFID systems have been proposed in order to solve security problems, but previous proposed protocols using AES(Advanced Encryption Standard) have fixed key problem and security problems. In this paper, we analyze security of proposed protocols and propose our protocol using OTP(One-Time Pad) and AES to solve security problems and to reduce hardware overhead and operation. Our protocol encrypts data transferred between RFID reader and tag, and accomplishes mutual authentication by one time random number to generate in RFID reader. In addition, this paper presents that our protocol has higher security and efficiency in computation volume and process than researched protocols and S.Oh's Protocol. Therefore, our protocol is secure against various attacks and suitable for lightweight RFID tag system.

A Study on the Prediction of Storage Life of Rolling Element Bearings for the Single-use Turbo Engine (일회성 터보엔진용 구름 베어링의 저장 수명 예측에 관한 연구)

  • Sun Je Kim;Dong Min Kim;Soon Ho Hong;Seong Ki Min
    • Journal of the Korean Society of Propulsion Engineers
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    • v.26 no.6
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    • pp.43-52
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    • 2022
  • Operational reliability of the single-use turbo engine for guided weapons must be guaranteed even after long-term storage. Rolling element bearings have a great influence on the operational reliability of the turbo engine, however changes in micro dimensions of bearings by an oxide layers on rolling elements and raceways may cause failures after long-term storage. In this study, changes in dimensions of bearings were measured and roughness of rolling elements was used for estimating the storage life. Storage life estimation was performed via two kinds of methods, Weibayes method and random sample generation method. The results of two methods were compared and their characteristics were analyzed. This study will contribute to establish an efficient maintenance schedule for the single-use turbo engine.

Design of Learning Model and System Based on Blended-Learning (Blended-Leaming 기반 학습 모형 및 시스템 설계)

  • 진선미
    • Proceedings of the Korean Information Science Society Conference
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    • 2004.10a
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    • pp.259-261
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    • 2004
  • 정보통신 공학의 발전과 급속한 사회변화의 가속화는 e-Learning이라는 교육의 새로운 패러다임을 창출하게 되었다. 사이버공간에서의 e-Learning의 많은 장점들과 효율성을 고려하여 거대한 시장성이 확보되고 있는 실정이나 실제 교육현장에서의 효과성에 대한 연구는 미흡한 상태이다. 사이버 시대에 걸맞는 교육시스템으로는 오프라인 교육과정 중심, 일회성 교육중심에서 온, 오프라인이 통합되는 총체적인 학습 촉진 시스템의 설계방법론의 필요성이 대두되고 있다. 본 논문에서는 온라인 학습을 오프라인 상의 어떤 활동으로 연계시켜 온라인 상에서 발생하는 학습의 불완성을 극복하고 보완할 수 있는 통합적 대안으로 blended-learning을 기반으로 한 학습 모형을 설계하고 학습을 지원해 줄 학습 시스템을 설계하였다.

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Virtual Password Input System for the secure Electronic Transactions (안전한 상거래를 위한 가상 비밀번호 입력 시스템)

  • Kwon, Mann-Jun;Lee, Won-Ho
    • Proceedings of the KAIS Fall Conference
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    • 2010.05a
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    • pp.397-399
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    • 2010
  • 본 논문에서는 사용자의 원천 비밀정보의 직접적인 유출을 근본적으로 방지하고자, 사용자 스스로가 원천 비밀정보를 이용해 일회성의 가상 비밀정보를 생성, 키보드입력 및 화면 훔쳐보기와 리플레이 공격, 그리고 피싱 등의 공격으로부터 안전성을 보장할 수 있는 가상 비밀번호 입력 시스템을 제안한다.

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대학 통합, 성과와 과제(부산대-밀양대)

  • Kim, Yu-Geun
    • 대학교육
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    • s.147
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    • pp.56-60
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    • 2007
  • 부산대학교의 통합은 대학구조개혁과 캠퍼스별 특성화를 동시에 이룩한 국립대 구조개혁의 표본적 성공 사례라 할 수 있다. 통합으로 인해 입학정원 감축, 단과대학 및 산업대학원 통폐합, 유사·중복학과 통폐합, 행정조직 감축, 신입생 충원율 개선 등의 성과가 있었으며, 캠퍼스 특화 전략에 따라 부산캠퍼스는 연구중심대학으로, 양산캠퍼스는 세계적 의료 허브로, 밀양캠퍼스는 나노·바이오 분야로 특화하였다. 향후 부산대학교는 지속적 개혁을 통하여 혁신을 도모함으로써 단발성, 일회성이 아닌 일상적, 상시적 혁신을 추진하여 혁신의 시스템화를 정착시키고자 한다. 그리고 진정한 혁신을 위해 교육 분야 혁신, 산학연구 혁신, 행정 혁신에 더욱 박차를 가할 것이다.

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Design of protocol of mobile e_gift certificate (모바일 전자상품권 프로토콜의 설계)

  • Yong, Seunglim
    • Proceedings of the Korea Information Processing Society Conference
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    • 2013.05a
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    • pp.625-627
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    • 2013
  • 모바일 기기의 성능 향상과 모바일 인터넷 서비스의 활성화, 스마트폰 시장의 급속한 성장으로 모바일 쿠폰 시장 빠르게 활성화 되고 있으나 이로 인한 다양한 문제점이 발생되고 있다. 본 논문에서는 이러한 문제점들을 방지하고 일회성의 쿠폰 이외에 다회 이용 가능한 모바일 전자상품권 프로토콜을 제안한다. 동형암호를 적용하여 모바일 기기에서 암호화와 복호화 연산을 최소화하도록 설계하였으며, 쿠폰의 정보는 암호화되고 사용시마다 새로 생성되도록 하여 이중사용과 복제가 불가능 하도록 설계하였다.

A Study on the Development of Application Requisition System for College Using JSP (JSP를 이용한 대학교 원서접수 시스템의 구축에 관한 연구)

  • Choi, Eun-young;Lee, Im-geun
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2018.10a
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    • pp.90-92
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    • 2018
  • Users who visit pages on a one-time for accepting applications will find it inconvenient to have CS-based systems that require separate installation. However, since JSP is compiled into servlets by JSP engine, no installation is required. In this paper, we have studied the process and the construction process of the self - application receiving system developed on the basis of JSP as the case of D university.

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