• Title/Summary/Keyword: User Input

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Weaknesses Cryptanalysis of Khan's Scheme and Improved Authentication Scheme preserving User Anonymity (Khan 인증기법의 취약점 분석과 개선된 사용자 익명성 제공 인증기법)

  • Park, Mi-Og
    • Journal of the Korea Society of Computer and Information
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    • v.18 no.2
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    • pp.87-94
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    • 2013
  • In this paper, we analyse the weaknesses of authentication scheme preserving user anonymity proposed by Khan et al in 2011 and we propose a new authentication schemes preserving user anonymity that improved these weaknesses. Khan et al's authentication scheme is vulnerable to insider attack and doesn't provide user anonymity to the server. Also, this scheme is still a weakness of wrong password input by mistake in spite of proposing the password change phase. In this paper, we will show that Khan et al's scheme is vulnerable to the stolen smart card attack and the strong server/user masquerade attack. The proposed authentication scheme propose the improved user anonymity, which can provide more secure privacy to user by improving these weaknesses.

A Study on the Development Process of User Authentication Software (사용자 인증 소프트웨어 개발 프로세스에 관한 연구)

  • 이상준;배석찬
    • The Journal of Society for e-Business Studies
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    • v.9 no.1
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    • pp.255-268
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    • 2004
  • User authentication is indispensable in computer login and internet banking. Usability as well as security is needed in user authentication software. To develop the software systematically, development process must be defined, and it can result in the improvement of software maturity. In this paper, a process needed to develop user authentication software systematically is proposed from experience of developing visual password input software. This process is composed of 6 phases and 15 activities. It is able to improve usability with its requirement analysis, planning, integration testing, and acceptance testing activity.

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A Development of Chatbot for Emotional Stress Recognition and Management using NLP (자연어 처리를 이용한 감정 스트레스 인지 및 관리 챗봇 개발)

  • Park, Jong-Jin
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.67 no.7
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    • pp.954-961
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    • 2018
  • In this paper, a chatbot for emotional stress recognition and management using rule-based method and NLP is designed and developed to tackle various emotional stresses of people through questionnaire. For this, Dialogflow as open chatbot development platform and Facebook messenger as chatting platform are used. We can build natural and resourceful conversational experiences through predefined questions by using powerful tools of Dialogflow, and can use developed chatbot on the Facebook page messenger. Developed chatbot perceives emotional stresses of user by user-input which is either text or choice of predefined answer. It also gives user questions according to the user's feeling, and assess the strength of the emotional stresses, and provide a solution to the user. Further research can improve the developed chatbot by using open Korean NLP library and database of emotions and stresses.

Customized Resource Collaboration System based on Ontology and User Model in Resource Sharing Environments

  • Park, Jong-Hyun
    • Journal of the Korea Society of Computer and Information
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    • v.23 no.4
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    • pp.107-114
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    • 2018
  • Recently, various wearable personal devices such as a smart watch have been developed and these personal devices are being miniaturized. The user desires to receive new services from personal devices as well as services that have been received from personal computers, anytime and anywhere. However, miniaturization of devices involves constraints on resources such as limited input and output and insufficient power. In order to solve these resource constraints, this paper proposes a resource collaboration system which provides a service by composing sharable resources in the resource sharing environment like IoT. the paper also propose a method to infer and recommend user-customized resources among various sharable resources. For this purpose, the paper defines an ontology for resource inference. This paper also classifies users behavior types based on a user model and then uses them for resource recommendation. The paper implements the proposed method as a prototype system on a personal device with limited resources developed for resource collaboration and shows the effectiveness of the proposed method by evaluating user satisfaction.

Implementation of Image Enhancement Algorithm using Learning User Preferences (선호도 학습을 통한 이미지 개선 알고리즘 구현)

  • Lee, YuKyong;Lee, Yong-Hwan
    • Journal of the Semiconductor & Display Technology
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    • v.17 no.1
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    • pp.71-75
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    • 2018
  • Image enhancement is a necessary end essential step after taking a picture with a digital camera. Many different photo software packages attempt to automate this process with various auto enhancement techniques. This paper provides and implements a system that can learn a user's preferences and apply the preferences into the process of image enhancement. Five major components are applied to the implemented system, which are computing a distance metric, finding a training set, finding an optimal parameter set, training and finally enhancing the input image. To estimate the validity of the method, we carried out user studies, and the fact that the implemented system was preferred over the method without learning user preferences.

Augmenting Interactivity of Touch Pad by Adding Isometric Rate Control

  • Heo, Seong-Kook;Hahn, Min-Soo
    • 한국HCI학회:학술대회논문집
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    • 2009.02a
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    • pp.240-244
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    • 2009
  • In this paper, we present FloatingPad, a touch pad based device with better scrolling feature and more interaction styles than a traditional touch pad. When we interact with a real object like a picture or a book, we manipulate on the object, and we also move, rotate, and flip the object. We applied this idea into a touch pad. In FloatingPad, the touch pad is not fixed to the device. It is floating on the device; it can be slid on the device. Therefore a user can have additional degree of freedom of input by shifting and rotating the touch pad while having the traditional touch pad input. By using this technique, the interactivity of the touch pad can be augmented, and better scrolling feature can be provided by reducing clutching occurs on the position scrolling devices by using the movement of the touch pad as rate control. We implemented the prototype device and conducted a user study with three applications developed for FloatingPad.

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Power consumption evaluation of Set-top box mode transition scheme considering passive stand-by mode (수동대기모드를 고려한 셋톱박스 모드전환 기술의 에너지 절감 성능 분석)

  • Kim, Yong-Ho;Kim, Hoon
    • Journal of The Institute of Information and Telecommunication Facilities Engineering
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    • v.10 no.4
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    • pp.135-142
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    • 2011
  • This paper proposes a performance evaluation method for power consumption of set-top box (STB) stand-by mode transition schemes. A stand-by mode transition scheme characterizes the timing of mode transition. The timing of mode transition affects the duration of stand-by mode operation, and the power consumptions of STB as well. Recently a fast stand-by mode transition scheme (FMT) has been proposed based on user input for selecting the device to be connected to TV. In this paper, we evaluate power consumption of FMT and a conventional mode transition scheme. For the computation of the duration of stand-by mode operation, the user input events are modeled as Poisson process. Simulation results based on the modeling reveals that the proposed scheme is more effective in power saving than the conventional scheme by up to 30%.

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Two-Way Relaying-Based Two-Hop Two-User Multiple-Input Multiple-Output System

  • Cho, Young Seek;Choi, Seyeong
    • Journal of information and communication convergence engineering
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    • v.12 no.2
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    • pp.67-74
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    • 2014
  • In multi-hop communication systems, two-way relaying is one of the solutions to mitigate the spectral efficiency loss caused by a half-duplex transmission. In this paper, a simple two-way relaying scheme is proposed for two-hop two-user multiple input multiple output (MIMO) systems. In the proposed system, a base station and a relay station (RS), both equipped with two antennas, form a point-to-point MIMO channel, while the RS and two single-antenna mobile users form a point-to-multipoint multiuser (MU)-MIMO channel. Numerical examples show that the proposed system achieves a significant sum rate gain as compared to a one-way relaying system as the distance between a relay and the two users decreases. We also show that although we can expand the proposed scheme to more than two users, its performance gain as compared to that of one-way relaying decreases with an increase in the number of users.

Development of a Simulation Program for Virtual Laser Machining (가상 레이저가공 시뮬레이션 프로그램 구축)

  • Lee Ho Yong;Lim Joong Yeon;Shin Kui Sung;Yoon Kyung Koo;Whang Kyung Hyun;Bang Se Yoon
    • Journal of the Korean Society for Precision Engineering
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    • v.22 no.7 s.172
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    • pp.54-61
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    • 2005
  • A simulator for virtual laser machining is developed to help understanding and predicting the effects of machining parameters on the final machined results. Main program is based on the model for polymer ablation with short pulse excimer lasers. Version f of the simulator is built using Visual Fortran to make the user work under visual environment such as Windows on PC, where the important machining parameters can be input via dialog box and the calculated results for machined shape, beam fluence, and temperature distribution can be plotted through the 2-D graphics windows. Version II of the simulator is built using HTML, CGI and JAVA languages, allowing the user to control the input parameters and to see the results plot through the internet.

A Study on the Development of Simulator for Performance Evaluation of Traffic Control using UPC Algorithm in ATM Network (ATM 망에서 UPC를 이용한 트래픽 제어방법의 성능평가를 위한 시뮬레이터의 개발에 관한 연구)

  • 김문선
    • Journal of the Korea Society for Simulation
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    • v.8 no.2
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    • pp.45-56
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    • 1999
  • It is necessary that we should control the traffic to not only efficiently use the rich bandwidth of ATM network but also satisfy the users various requirements for service quality. However, it is very difficult to decide which control mechanism would be applied in real network because there are various types of ATM traffic and traffic control mechanisms. In this paper, a smart simulator is developed ot analyze the performance of a UPC(Usage Parameter Control) mechanism which is a typical traffic control mechanism. The simulator consists of a user interface that supports a menu-driven input form and a simulation program that is executed with the users input parameters. Especially, the simulator establishes more powerful and flexible simulation environment since it supports a more complex simulation applying various source traffic to several different UPC mechanisms at the same time and allows an arbitrary user-defined traffic in addition to some well-known traffic.

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