• Journal of Advanced Navigation Technology
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• v.13 no.2
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• pp.280-286
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• 2009

A policy of instant messaging usage is offered in this article. First, a brief introduction of instant messaging system structure is described. The main threats and vulnerabilities of Instant messenger (IM) are described in the second part of the paper. Instant messaging applications offer so many advantages in so many different fields that they're fast becoming the preferred communication tool for a number of different professional scenarios. When properly implemented, instant messaging can be a true asset to the business by making communications easier throughout the organization. If instant messaging is carelessly implemented, though, it can cause problems with privacy and may expose the organization to various forms of malware. The solution offered in this paper is one of the effective ways against threats of IM. However, the system cannot be secured entirely. All we can do is reducing the risks.

• Journal of Korea Multimedia Society
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• v.7 no.6
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• pp.832-840
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• 2004

In ubiquitous environments, context is any information that can be used to characterize the situation of an entity such as a person or an object. Many sensors and small computers collect contexts and provide applications with them. Thus, ubiquitous applications need to represent contexts and exploit them effectively. In this paper, we design and implement a context-aware messaging system, called UMS (Ubiquitous Messaging System), based on Java and Jini. UMS can represent various contexts using XML scripts, and communicate text messages regardless of user's location using the proxy mechanism of Jini.

• Journal of Advanced Information Technology and Convergence
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• v.9 no.2
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• pp.15-27
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• 2019

This paper deals with a web-based public address system for conveying information for different institutions. An architecture for a Short Messaging Service (SMS) based public address (PA) system that can be programmed by an authorized mobile phone or device is proposed. This PA system will facilitate information transfer from heads of offices, managers, directors, and deans of the institutions to its constituents or unit area as well as enable postings of information with proper authentication and validation remotely. The system supports high priority messaging, allowing the conveyance of critical and time sensitive information. The mobility management support for the PA system will be based on the Hierarchical Mobile Internet Protocol version 6 (HMIPv6), hence, allowing for a seamless connectivity to the system. The major advantage of this proposed PA system as compared with the traditional electronic displays and bulletin boards is seamless mobility wherein the display devices can be programmed remotely by heads of the institutions and business organization. It also allows faster communication and immediate actions concerning the different institutions, organizations, and businesses, thus, ensuring high productivity.

• Journal of Korea Multimedia Society
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• v.11 no.6
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• pp.883-890
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• 2008

It becomes enabled to provide variety of multimedia contents through mobile service with the development of high-speed 3rd generation mobile communication and handsets. MMS (Multimedia Messaging Service) can be displayed in the presentation format which is unified the various multimedia contents such as text, audio, image, video, etc. It is applicable as a new type of ubiquitous learning. In this study we propose to design a mobile learning system by providing profiles which meets the standard of CC/PP and by generating multimedia messages based on SMIL language through the adaptation steps according to the learning environment, the content type, and the device property of learners.

• The KIPS Transactions:PartC
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• v.9C no.5
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• pp.637-646
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• 2002

In this paper, an implementation example of Java based MPEG-4 system that follows MPEG-4 standard protocols in order to provide multimedia-messaging service is introduced. The multimedia-messaging service is a wireless LAN based wired and wireless service that delivers multimedia contents including video and audio information. Detailed Methods to develop a MPEG-4 system like technology of MPEG-4 system implementation, definition for wired and wireless multimedia service, DMIF implementation, and mp4 file Parsing are described.

• Journal of Korea Multimedia Society
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• v.6 no.3
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• pp.481-487
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• 2003

Because XML is a W3C standard and has characteristics like platform-independent, it has a critical role in e-commerce. Business rules and Procedures should be standardized for efficient B2B integration. But a lot of companies are its own XML documents instead of standard documents. Therefore many organizations try to make standards for e-commerce based on framework. In this paper, we designed and implemented XML Messaging System based on TCP/IP protocols. This system are designed by module. Because, it is easy to extensibility of system. So we can more easily and efficiently build e-commerce system based on this XML messaging system.

• The Journal of the Korea Contents Association
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• v.8 no.1
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• pp.152-159
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• 2008

In this paper, we have studied a new method in which multimedia message can be processed effectively in SIP(Session Initiation Protocol)-based Instant Messaging service. Total system is composed of multimedia message server, presence server and user system. To provide effectively message informations such as number of messages stored in the multimedia message server, waiting status and message types to users, we have proposed a new method which can be a substitute for message waiting indication event package. In our proposed method, when changes of messages status informations occur, these informations are sent to the presence server, and can be transferred as a separate tag within notification message. The presence server processes subscription requests and notifications, and efficiency can be improved as it provides both message status informations and several communication status informations such as on-line status to service users. Partial publication is used in our system to improve data transfer efficiency more between user system and the presence server. The performance of our proposed model is evaluated by experiments measuring multimedia message transfer speed and server processing time.

• Journal of Korea Multimedia Society
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• v.20 no.5
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• pp.808-826
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• 2017

Most of conventional DSS's(Digital Signage Systems) have been built based on LAMP framework. Recent researches have shown that MEAN or MERN stack framework is simpler, more flexible, faster and more suitable for web-based application than LAMP stack framework. In this paper, we propose a design and implementation of MEARN (ME(A+R)N) stack-based real-time digital signage system, MR-DSS, which supports handing real-time tasks like urgent/instant messaging, system status monitoring and so on, efficiently in addition to conventional digital signage CMS service tasks. MR-DSCMS, CMS of MR-DSS, is designed to provide most of its normal services by REST APIs and real-time services like urgent/instant messaging by Socket.IO base under MEARN stack environment. In addition to architecture description of components composing MR-DSS, design and implementation issues are clarified in more detail. Through experimental testing, it is shown that 1) MR-DSS works functionally well, 2) the networking load performance of MR-DSCMS's REST APIs is better compared to a well-known open source Xibo CMS, and 3) real-time messaging via Socket.IO works much faster than REST APIs.

• 한국정보통신설비학회:학술대회논문집
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• 2008.08a
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• pp.121-124
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• 2008

KT starts MMS(Multimedia Messaging System) service based on wired BcN(Broadband Convergence Network) telephone on August, 2008. BcN telephones have various service functions, and MMS service has been serviced for years. However, we should check KT MMS service system. KT MMS service is based on a PS(presence server), so KT MMS system sends a MMS message to the most convenience terminal for each receiver. Most other current MMS system send MMS message to a terminal which the sender set directly. However KT MMS system decides called party terminal based on the receiver's situation.

• Proceedings of the Korea Multimedia Society Conference
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• 2012.05a
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• pp.259-261
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• 2012

Chatting room has become widely using technology and it is vulnerable to the internet attackers. We proposed a chatting system using a Purebasic programming language to communicate across networks system. Chatting room text is a form of instant messaging between two or group of people. A Communication experiment was designed and implemented to confirm the validity of the developed chatting system on a trusted platform.