• Title/Summary/Keyword: Protect Device

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Cloud Messaging Service for Preventing Smishing Attack (스미싱 공격 방지를 위한 클라우드 메시징 서비스)

  • Park, Hyo-Min;Kim, Wan-Seok;Kang, So-Jeong;Shin, Sang Uk
    • Journal of Digital Convergence
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    • v.15 no.4
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    • pp.285-293
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    • 2017
  • They are rapidly evolving malicious attacks on smart devices, and to timely protect the smart devices from these attacks has become a very important issue. In particular, smishing attack has emerged as one of the most important threats on the smartphone. In this paper, we propose the cloud service that can fundamentally protect the user from the risk of smishing attack. The proposed scheme provides cloud messaging service that can filter text messages including URLs in the user's smart device, view and manage them through a virtual machine provided by a cloud server. The existing techniques for preventing smshing attacks protect only malicious code of a known pattern and there is the possibility of error such as FP(False Positive) or FN(False Negative). However, since the proposed method automatically filters all text messages including URLs, storing, viewing, and managing them in their own storage space on the cloud server, it can completely block the installation of malwares(malicious codes) on the user's smart device through smishing attacks.

Implementation of Small Automatic Lubrication Device for Automated Processes in Smart Factory (스마트 공장에서 자동화 공정을 위한 소형 자동 윤활 장치 구현)

  • Lee, Yoo-Ri;Kim, Hyeong-Jun;Kim, Man-Ho
    • Journal of the Korean Society of Industry Convergence
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    • v.23 no.5
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    • pp.765-771
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    • 2020
  • Automatic lubrication devices are applied in various fields, such as huge machinery, construction machinery or commercial vehicles, to lower maintenance costs and protect the devices. In addition, the automatic lubrication device reduces frequent component failures cause by friction and allows the machine to replace the lubricating oil replenishment work carried out by the manager. However, the automatic lubricating device used in large machinery or commercial vehicles is relatively large, containing a large amount of lubricant in the space to be lubricated. On the other hand, a smart factory, such as a home appliance or cosmetics factory, lacks space to install large automatic lubrication devices, and it is difficult to distribute electricity. Therefore, there is a need for an automatic lubrication device that can be used in various environments that require lubrication. In this paper, a small automatic lubrication device is proposed for smart factories that have changed parts of existing factories, such as electronics factories, to minimize friction arising from mechanical parts, etc. In particular, the structure of lubricating pumps and component parts that are the core of automatic lubrication devices was described so that they could be utilized in various fields. Finally, a test bed environment is established for the proposed automatic lubrication device to evaluate its performance and verify its applicability.

Performance Evaluation of Antioxidizing Device for Protection of Car Body (자동차 차체 보호를 위한 산화방지 장치의 성능 평가)

  • Kim, Hae Sik;Yun, Yeong Jin;Ji, Jong Gi
    • Journal of the Korean Chemical Society
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    • v.46 no.5
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    • pp.444-456
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    • 2002
  • To protect the occurrence of the oxidation of car body, we developed antioxidizing device made with sacrificial anode. Because car body is made of iron and iron-alloy and oxidation potential of Mg, Al and Zn is higher than that of iron, sacrificial anodes were made with Mg, Al and Zn. Accordingly, Mg, Al and Zn are better oxidizing than car body, iron and iron-alloy can be protected from oxidizing. We have made an antioxidizing device and evaluated their anti-corrosive effect for iron piece in the solution of hydrochloric, nitric and sulfuric acid using balance, SEM and XPS. When iron pieces were connected with antioxidizing device of car body, weight loss by oxidation was remarkably reduced and surface corrosion of iron piece was protected. It was shown that the surface of iron pieces which is not con-nected to the device was changed to iron(Ⅲ) oxide, Fe$_2$O$_3$. Therefore, if this device is attached to car body, corrosion and oxidation of car body will be reduced, considerably.

Design and Realization of High Voltage Operational Amplifier (고전압 연산 증폭기의 설계 및 구현)

  • Kim, Kee-Eun;Jung, Hea-Yong;Cho, Jae-Han;Park, Jong-Sik
    • Proceedings of the KIEE Conference
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    • 2002.11c
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    • pp.517-520
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    • 2002
  • This paper has been studied Operational Amplification Circuit that has high power specification of 90 W is designed. In the input differential amplifier stage, the current source for circuit bias is designed to protect device from high voltage source. the criving state has the voltage gain more than input differential stage. With temperature compensation design, output stage works stable in different to temperature.

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A Development of Distributed Parallel Processing algorithm for Power Flow analysis (유기EL과 무기EL에 관한 연구)

  • Lee, Han-Sung
    • Proceedings of the KIEE Conference
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    • 2001.07e
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    • pp.67-71
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    • 2001
  • Nowdays, we can communicate using Information Technology such as internet, personal computer, mobile phone etc. To protect global environment, it is also reqired to invent products efficiently reduce energy consumption. here, I studied organic EL and inorganic EL because organic EL display is appropriate device as light, thin, energy-saying display following CRT, LCD. As a result, I realized that we are supposed to study more on invention, efficiency and mass-production of materials. Comparing with another display, however, it would be marketable in few years, considering short history of its full-scaled studies.

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Apparatus for massaging of the principle ni,n of the human body in cushion for chair (노화방지용 좌욕기 장치개발)

  • 박노국
    • Proceedings of the Safety Management and Science Conference
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    • 2003.05a
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    • pp.143-147
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    • 2003
  • This study is to develop a device of bath-seat with massage which is attached to bath-seat and is able to sustain massage on perineal region and anus effectively. And also develop new programmed driving-seat that is able to protect drowsiness. This seat is operated easily by user controlling time period (eg. 30 minutes or 60 minutes) of vibration. During the vibration, user can make a choice of making n sound which is proved as a better effects for concentration and comfort.

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Design of high speed-low voltage LVDS driver circuit with the novel ESD protection device (새로운 구조의 ESD 보호소자를 내장한 고속-저전압 LVDS Driver 설계)

  • Lee, Jae-Hyun;Kim, Kui-Dong;Kwon, Jong-Ki;Koo, Yong-Seo
    • Proceedings of the IEEK Conference
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    • 2005.11a
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    • pp.731-734
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    • 2005
  • In this study, the design of advanced LVDS(Low Voltage Differential Signaling) I/O interface circuit with new structural low triggering ESD (Electro-Static Discharge) protection circuit was investigated. Due to the differential transmission technique and low power consumption at the same time. Maximum transmission data ratio of designed LVDS transmitter was simulated to 5Gbps. And Zener Triggered SCR devices to protect the ESD phenomenon were designed. This structure reduces the trigger voltage by making the zener junction between the lateral PNP and base of lateral NPN in SCR structure. The triggering voltage was simulated to 5.8V. Finally, we performed the layout high speed I/O interface circuit with the low triggered ESD protection device in one-chip.

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Design and Evaluation of Opening Devices of Separable Nose Cap (노즈캡 분리장치 성능 연구)

  • Kang, ChoonGil;Lee, DongMin;Park, GeunSoo
    • Journal of the Korea Institute of Military Science and Technology
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    • v.18 no.2
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    • pp.101-108
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    • 2015
  • In this paper, we have proposed a separable nose cap and its opening device to protect a seeker's window from aerodynamic heating and to decrease the drag force on missile body. The nose cap should be promptly deployed to secure the view field of seeker when it is needed. This cap consists of two nose cap structures and separation devices such as pyro puller and pusher. The performance of pyro puller was fully verified through analyses and several kinds of operating tests. We can obtain a sufficient confidence level of the pyro puller through many operating tests under various environments.

Failure Rate Estimation of MOV for Condition Monitoring of Surge Protective Devices (서지보호기의 상태 감시를 위한 MOV의 고장률 예측)

  • Kim, Dong Jin;Kim, Young Sun;Park, Jae Jun;Lee, Ki Sik
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.62 no.9
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    • pp.1302-1307
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    • 2013
  • MOV(Metal Oxide Varistor) is the most important part of SPD(Surge Protective Device) which can protect electric facilities from an impulse current such as a lightning. So far, the fault of MOVs have decided only by surge count without considering magnitude of surge current and an amount of input energy. This paper proposed the fault prediction algorithm for the MOV using look up table made by surge count and input current data which have non-linear characteristics for input current and are estimated by high voltage experimental results. Proposed algorithm was proved by experiment on verification at a high voltage laboratory.

A Smart System for Customer Ordering Management at Offline Stores (오프라인 매장에서 고객 순번 관리를 위한 스마트 시스템)

  • Chung, Myoungbeom
    • Journal of Korea Multimedia Society
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    • v.21 no.8
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    • pp.925-933
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    • 2018
  • In this paper, we propose a new smart ordering application system for granting the customer numbers. The proposed system assigns sequence number of customers who visit at offline store as using speaker and microphone of smart device. This system has more advantage than the existing ordering system. Because the proposed system does not need any customer information like as phone number or SNS ID, it can protect customer privacy information. In this system, we use high frequency which is inaudible to the human ear as communication signal between speaker and microphone. To confirm performance evaluation, we perform a test with ten smart devices like as iPhone 6, 7, 8, Galaxy s8 and the result shown a success rate of 98.7 percent. Therefore, the proposed system can be useful service technology at the various offline store which need to assign a sequence number for customers, because many customers visit at the store.