• 한국전자거래학회지
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• 제7권1호
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• pp.225-237
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• 2002

As the population of the Internet inneases, so does that of mobile Internet. Currently, the use area of mobile Internet is rather limited due to the low speed of transmission and lack of applications. However, it is evident that the speed will be improved and more applications will be developed. In this paper, we propose： i) to use WAP in SCM, ii) to interconnect WAP and XML/EDI system, iii) to interconnect WAP, XML/EDI, Legacy system in SCM. We implemented a prototype which can show the interconnection among WAP, XML/EDI, and Legacy system. We hope the concept could be used in real applications in the near future.

• 한국정보기술응용학회:학술대회논문집
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• 한국정보기술응용학회 2006년도 공동심포지엄
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• pp.162-186
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• 2006

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제8권3호
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• pp.838-856
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• 2014

Enhanced network speed and the appearance of various applications have recently resulted in the rapid increase of Internet users and the explosive growth of network traffic. Under this circumstance, Internet users are eager to receive reliable and Quality of Service (QoS)-guaranteed services. To provide reliable network services, network managers need to perform control measures involving dropping or blocking each traffic type. To manage a traffic type, it is necessary to rapidly measure and correctly analyze Internet traffic as well as classify network traffic according to applications. Such traffic classification result provides basic information for ensuring service-specific QoS. Several traffic classification methodologies have been introduced; however, there has been no favorable method in achieving optimal performance in terms of accuracy, completeness, and applicability in a real network environment. In this paper, we propose a method to classify Internet traffic as the first step to provide stable network services. We integrate the existing methodologies to compensate their weaknesses and to improve the overall accuracy and completeness of the classification. We prioritize the existing methodologies, which complement each other, in our integrated classification system.

• International Journal of Computer Science & Network Security
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• 제22권9호
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• pp.15-22
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• 2022

The Tactile Internet technology is considered as the evolution of the internet of things. It will enable real time applications in all fields like remote surgery. It requires extra low latency which must not exceed 1ms, high availability, reliability and strong security system. Since it appearance in 2014, tremendous efforts have been made to ensure authentication between sensors, actuators and servers to secure many applications such as remote surgery. This human to machine relationship is very critical due to its dependence of the human live, the communication between the surgeon who performs the remote surgery and the robot arms, as a tactile internet actor, should be fully and end to end protected during the surgery. Thus, a secure mutual user authentication framework has to be implemented in order to ensure security without influencing latency. The existing methods of authentication require server to stock and exchange data between the tactile internet entities, which does not only make the proposed systems vulnerables to the SPOF (Single Point of Failure), but also impact negatively on the latency time. To address these issues, we propose a lightweight authentication protocol for remote surgery in a Tactile Internet environment, which is composed of a decentralized blockchain and physically unclonable functions. Finally, performances evaluation illustrate that our proposed solution ensures security, latency and reliability.

• Journal of Information Processing Systems
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• 제15권4호
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• pp.797-819
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• 2019

Internet of Things (IoT) is the paradigm of network of Internet-connected things as objects that constantly sense the physical world and share the data for further processing. At the core of IoT lies the early technology of radio frequency identification (RFID), which provides accurate location tracking of real-world objects. With its small size and convenience, RFID tags can be attached to everyday items such as books, clothes, furniture and the like as well as to animals, plants, and even humans. This phenomenon is the beginning of new applications and services for the industry and consumer market. IoT is regarded as a fourth industrial revolution because of its massive coverage of services around the world from smart homes to artificial intelligence-enabled smart driving cars, Internet-enabled medical equipment, etc. It is estimated that there will be several dozens of billions of IoT devices ready and operating until 2020 around the world. Despite the growing statistics, however, IoT has security vulnerabilities that must be addressed appropriately to avoid causing damage in the future. As such, we mention some fields of study as a future topic at the end of the survey. Consequently, in this comprehensive survey of IoT, we will cover the architecture of IoT with various layered models, security characteristics, potential applications, and related supporting technologies of IoT such as 5G, MEC, cloud, WSN, etc., including the economic perspective of IoT and its future directions.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제13권3호
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• pp.1123-1140
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• 2019

Many Internet of Things (IoT) applications involving bursty traffic have emerged recently with event detection. A power management scheme qualified for uplink bursty traffic (PM-UBT) is proposed by distinguishing between bursty and general uplink traffic patterns in the IEEE 802.11 standard to balance energy consumption and uplink latency, especially for stations with limited power and constrained buffer size. The proposed PM-UBT allows a station to transmit an uplink bursty frame immediately regardless of the state. Only when the sleep timer expires can the station send uplink general traffic and receive all downlink frames from the access point. The optimization problem (OP) for PM-UBT is power consumption minimization under a constrained buffer size at the station. This OP can be solved effectively by the bisection method, which demonstrates a performance similar to that of exhaustive search but with less computational complexity. Simulation results show that when the frame arrival rate in a station is between 5 and 100 frame/second, PM-UBT can save approximately 5 mW to 30 mW of power compared with an existing power management scheme. Therefore, the proposed power management strategy can be used efficiently for delay-intolerant uplink traffic in event-driven IoT applications, such as health status monitoring and environmental surveillance.

• Journal of information and communication convergence engineering
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• 제1권3호
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• pp.109-114
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• 2003

There is an emergence of Internet applications that have real-time requirements. These applications require IP to support guaranteed capacity, higher priority and lower packet loss rate. To address this, the Internet Engineering Task Force (IETF) is developing a set of protocols and standards for Integrated Services on the Internet. Using RSVP and policies to manage the allocation of network resources in order to provide different levels of service is a topic of great interest to service providers. Currently, it is not possible to dynamically reallocate resources during an application's session. This paper discusses how policies in conjunction with new service class can provide a more enhanced network resource allocation by allowing for this dynamic reallocation.

• 한국정보시스템학회지:정보시스템연구
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• 제10권1호
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• pp.127-146
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• 2001

The area of business applications in the internet are extended enormously in result of fast development of computing and communication technologies, increase of internet use, and use of intranet/extranet in enterprise information system. Widely spread the use of the internet, there are various applications for Business to Business (B to B) or Business to Customer(B to C) model that are based on the intranet or extranet. This paper designed and implemented the Web-based Electronic Bidding System for Business to Business (B to B) model. The technical issues of electronic bidding system in the internet are involved in the connection between web client and server, electronic data interchange for the contract document, and security solution during the bidding and contracting processes. The web-based electronic bidding system in this paper is implemented using Java applet and servlet as a connection interface for web client and server, XML/EDI-based documents for a bid and a contract, and bidding server and notary server for enhancing the security using PKI(Public Key Infrastructure)-based public key cryptography, digital signature and Certification Authority(CA).

• 한국정보과학회논문지:컴퓨팅의 실제 및 레터
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• 제9권2호
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• pp.166-181
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• 2003

최근 인터넷의 급속한 성장으로 Web TV, PDA 및 Web phone과 같은 장치들이 인터넷에 연결되기 시작하고 있다. 그러나, 이러한 장치들은 복잡한 실시간 응용 시스템을 지원하기 위해 RTOS와 같은 실시간 운영체제가 필요로 하게 되었으며, 특히, 내장형 인터넷 응용 시스템을 개발하기 위한 디버거 등과 같은 적절한 도구들의 부족으로 개발하는데 어려움을 겪고 있다. 이에, 본 논문에서는 Qplus-T 실시간 운영 체제 내장형 시스템을 위한 새로운 트레이스포인트 디버깅 도구를 제안하다. 이 도구는 타이밍 트레이스포인트들을 이용하여 실시간 응용 소프트웨어의 디버깅을 쉽게 한다. 전통적인 브레이크포인트 디버거에 비해, 이 트레이스포인트 디버거는 온라인 및 오프라인 분석을 위해 응용 프로그램의 데이터를 동적으로 수집하고 기록하는 기능을 제공한다. 그리고, 응용프로그램의 실행을 멈추거나 원래의 실행 속도에 참견이 거의 없이 실행중인 응용프로그램의 변수들에 새로운 값을 할당해 보기 위한 수단으로도 제공된다. 본 논문에서 제시하는 트레이스포인트 디버거는 Qplus-T 인터넷 응용프로그램과 같은 타겟 실시간 응용 프로그램에 수많은 모니터링 트레이스포인트들을 추가하기 위한 효과적인 방법을 제공하며, 실행 중에 응용프로 그램의 행위를 모니터하고 분석하기 위한 트레이스포인트를 설정할 수 있다. 또한, RTL(Real-Time Logic) 표현을 이용하여 타이밍 문제를 명세화하고 검출할 수 있어 기존 트레이스포인트 디버거와는 다르다.

• 한국인터넷방송통신학회논문지
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• 제13권4호
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• pp.55-60
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• 2013

인터넷이 발달하기 이전에는 클라이언트에서 실행되는 응용 소프트웨어들이 주로 사용되었다. 그러나 클라이언트 기반의 응용 프로그램은 운영체재 또는 다른 소프트웨어와 충돌 문제를 일으켰고, 클라이언트에 배포를 하는데 있어 버전 문제, 운영체재의 상이한 구조 차이에서 오는 실행 오류 등이 존재했었다. 이런 단점들이 인터넷이 발달되며, 클라이언트-서버 기반의 웹 응용 프로그램으로 대체되기 시작했다. 그러나 웹 브라우저가 가지는 기본적인 제약으로 인해 응용 프로그램은 서로 다른 수 많은 언어로 제작되고, 또 그로 인한 실행 성능에 심각한 문제를 야기하기도했다. 이런 문제점들을 해결하는 대안으로 최근 스마트 클라이언트라는 기술이 대두되고 있다. 스마트 클라이언트는 과거의 리치 클라이언트와 씬 클라이언트가 가지는 장점을 모두 포함하고 있다. 스마트 클라이언트는 기본적으로 웹서비스 기반인데, 사용자에게 응용 프로그램의 실행과 관련된 기능 일부를 전담하게 하고 서버는 데이터만 받아서 가공하는 개념이다. 본 연구에서는 버스정류장에 설치된 BIT(Bus Information Terminal)를 중심으로 현재 실무에서 이루어지는 개발방식을 비교하고 웹브라우저를 활용한 보다 풍부한 기능 사용이 가능한 스마트 클라이언트 기반 BIT를 설계 적용하였다.