• International Journal of Computer Science & Network Security
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• v.22 no.2
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• pp.75-80
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• 2022

With the rapid growth of Internet of Things (IoT) applications and devices, there are still defects in safety and privacy. Current researches indicate that there are weak security mechanisms to protect these devices. Humans use the Internet of Things to control and connect their devices with the Internet. Using the Internet of things has been increased over time. Therefore, capture of sensitive user data has increased intentionally or not [1]. The IP Camera is a type of (IOT) devices. Therefore, in this paper we aim to create a "Security Eyes" application that protects IP Cameras from security attacks according to certain security mechanisms (increasing the strength of encryption and filling the usual security holes in IP cameras … etc) and alerts the user when the live broadcast is interrupted or an error occurs.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.04a
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• pp.775-776
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• 2011

차량이 IGW(Internet Gateway)를 통해 외부 인터넷 망과 통신하는 V2I(Vehicle-to-Infrastructure) 환경에서는 IGW가 DHCP 서버로서의 역할을 수행함으로써 차량에게 IP 주소를 부여해준다. 이 경우 차량이 새로운 IGW의 커버리지 영역으로 이동하게 되면 이 IGW로부터 새로운 IP 주소를 부여받아야 하며, 이 경우 주소 할당을 받는데 수 초의 시간이 소요되어 서비스 단절이 발생한다. 본 논문에서는 V2I 환경에서 차량에게 IP 주소를 신속하게 할당해주기 위한 주소 선할당(pre-allocation) 방법을 제안한다. 주소 선할당 방법은 차량이 후행 차량들을 위해 IGW에게 IP 주소를 미리 요청하고 이렇게 획득한 주소를 후행 차량에게 할당해줌으로써 IP 주소 획득에 소요되는 시간을 줄여준다.

• Journal of Korea Multimedia Society
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• v.10 no.4
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• pp.450-461
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• 2007

In this paper, we propose the method to use power-saving mode (PSM) applicable to non real-time traffic and PSM applicable to real-time traffic simultaneously, for VoIP traffic with silence suppression. The proposed method uses PSC II during talk-spurt interval of parties A and/or B and uses PSC I or probabilistic sleep interval decision (PSID) method during mutual silence interval, respectively. To evaluate the performance of hybrid PSM (HPSM) based on PSC II or PSID method, we present average buffering delay, energy consumption of mobile station and VoIP packet drop probability with simulation runs. Results shows that proposed HPSM decreases energy consumption of mobile station up to 25 % while satisfying the packet drop probability within QoS requirement in case of end-to-end VoIP connection.

• The Journal of the Convergence on Culture Technology
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• v.2 no.4
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• pp.77-82
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• 2016

IoT technology was selected as one of IT 10 strategic technologies by gartner from 2013 to 2015, and implements advanced smart society while enabling interaction between people and things. Because IoT devices are connected to the Internet, they are involved in issues including exposure of private lives, for example, hacking to result in wireless signal interference, data theft, data modification and forgery and service denial, and critical security issues including threat to national confidential information and facilities. This study aims to suggest a method for examining threats to security through IP exposure of IoT devices and examining related problems to minimize threats to security through IP exposure including exposure of private lives or damages to the national infrastructure system.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.33 no.6B
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• pp.411-419
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• 2008

As the set of new mobile data networking service technologies, such as WiBro, mobile WiMAX and WCDMA-HSDPA, have been introduced in recent years, IP mobility management protocols which aim to provide seamless IP service over the mobile networking environment become one of the important building blocks for the successful mobile networks. IETF has introduced a basic mobility management protocol over IPv6 (MIPv6) and a set of enhanced protocols such as FMIPv6 and HMIPv6, followed by FHMIPv6, S-MIPv6 and HIMIPv6 which combine the benefits of the basic protocols. We have studied the impact of the various IP mobility management protocols over TCP sessions through extensive simulations with ns-2. Our simulation results show that TCP performance with the HIMIPv6 outperforms MIPv6, FMIPv6 and HMIPv6 over the various TCP protocols, due to its efficient combination of the hierarchical mobility management scheme of the HMIPv6, the predictive handover scheme of the FMIPv6 and the fast simulcasting scheme of the S-MIP.

• The KIPS Transactions:PartC
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• v.16C no.2
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• pp.199-208
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• 2009

Recently,IP-based broadcasting systems,such as Mobile-TV and IP-TV, have been widely deployed. These systems require a security system to allow only authorized subscribers access to broadcasting services. We analyzed the Conditional Access System, which is a security system used in the IP-based Pay-TV systems. A weakness of the system is that it does not scale well when the system experiences frequent membership changes. In this paper, we propose a group key distribution protocol which overcomes the scalability problem by reducing communication and computation overheads without loss of security strength. Our experimental results show that computation delay of the proposed protocol is smaller than one of the Conditional Access System. This is attributed to the fact that the proposed protocol replaces expensive encryption and decryption with relatively inexpensive arithmetic operations. In addition, the proposed protocol can help to set up a secure channel between a server and a client with the minimum additional overhead.

• International Journal of Internet, Broadcasting and Communication
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• v.11 no.2
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• pp.67-75
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• 2019

"No IP, No Content" has become a phenomenon in the content industry, high-quality IP has a strategic importance. It has become a Trinity in the movie-anime-game basic package, Competition is more intense. However, there is a tremendous amount of know-how hidden behind the use of IP to operate games well. We are worth exploring in detail. The research and analysis of digital IP market, the advantages and disadvantages will be the focus of our pragmatic research. As an emerging market in the digital industry, China has great research value. This paper analyzes the status quo of the current Chinese market by comparing the mature US and Japanese markets. For example, the research of American Disney Company analyzes the mature market structure of Japan. compared with the excellent case of the Chinese market legend of qin. By studying the current situation of China's digital market, analyzing the interest trends of the customer base, discovering existing problems and improving the accuracy of the prediction and judgment of the Chinese digital market in the future.According to the survey, the IP heat is mainly concentrated in six categories of games, animation, TV, variety, movies, and novels. At present, the most popular IP of manufacturers have three major categories. This article will conduct research and analysis on digital IP, and analyze the market status of China, the United States, and Japan and the research on outstanding representative works in the market.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.23 no.3
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• pp.59-64
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• 2023

Fire and disaster broadcasting systems are divided into analog, digital, and network-based digital public address systems, and important specifications in network-based digital public address systems are low-latency audio, high sampling rate, and multi-channel input and output. In the past, it has been widely used to the AoE method for distinguishing based on the MAC address of the data link layer. However, this method has a problem of increasing complexity and cost. This proposal is an AoIP/UDP method, which allows communication to be easily distinguished by IP address without the need for a separate redundant network, so that the network can be freely used and configured, and cost can be reduced by reducing complexity. After implementing the AoIP/UDP method, the experimental results showed that the cost was improved with the equivalent performance with 2.66ms latency.

• Proceedings of the Korea Information Processing Society Conference
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• 2024.05a
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• pp.162-163
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• 2024

자율 주행 자동차의 기능 개발 및 시뮬레이션을 보다 효과적으로 수행하기 위해 AUTOSAR Adaptive Platform 과 ROS2 간의 통신을 가능하게 하는 데이터 변환 아키텍처를 제안한다. AUTOSAR Adaptive Platform 의 SOME/IP 와 TCP/UDP layer 사이에 Transport Gateway 를 구축해 SOME/IP 와 ROS2 의 DDS 프로토콜 간의 데이터 변환 로직을 구현한다. 두 통신 프로토콜 간의 상호 운용성을 검증하여 AUTOSAR AP 와 ROS2 시스템의 통합을 통해 자율 주행 자동차의 기능 개발 및 시뮬레이션을 보다 효과적으로 수행할 수 있음을 보인다.

• Journal of KIISE:Information Networking
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• v.31 no.2
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• pp.158-170
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• 2004

Mobile IP is a base protocol to support host mobility in IP-based wireless network. It is well known that the protocol contains two main delay factors on a handoff process; one is to detect a host movement, and the other is to register the host's current location to its home network. This paper examines Layer 2(L2) handoff procedure in the IEEE 802.11 Wireless LAN, and identifies these L2 triggers that can be usefully applied to Layer 3(L3) handoff. Then, the MCAA(Multiple-Casting using Anchor Agent) mechanism is proposed. It makes use of the L2 trigger and the network topology to construct an anchor agent dynamically, and the multiple-casting scheme to prevent an ongoing packet to be lost. Using a network simulator, the proposed mechanism has been evaluated the handoff delay and the packet lost point of view, in comparison with the regional registration protocol which is the most well known micro mobility support mechanism.