• The KIPS Transactions:PartC
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• v.11C no.3
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• pp.371-378
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• 2004

SIP(Session Initiation Protocol) is a text based call signaling protocol that has characteristics such as flexibilities and extensibility for various application services over Internet. In this paper, we have implemented SIP based integrated Instant Messenger system which includes Presence Watcher Information service that can notify various current users status. In this system, voice and video communications are also possible as well as text based instant messages. For voice and video communication, we have newly proposed a method in which direct connection is possible between users without creation of SW INVITE dialog by extending PRESENCE TUPLE of presence information. In this case, PRESENCE TUPLE stores some informations necessary for the session.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2022.05a
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• pp.189-191
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• 2022

In modern society, messenger services are necessary to communication with others, and criminals are no exception. In representative cases of Burning Sun Gate(2018) and NthRoom(2019), messenger data analysis was used as a smoking gun to solve these criminal cases. Therefore messenger text analytics is critical for the resolution of crimes in a modern environment. also, it takes a lot of time to analyze messenger data in the digital forensic investigation process, so researchers in text mining need to be more effective to respond with the current situation In this paper, we study various natural language preprocessing(NLP) methods according to the characteristics of instant messages to effectively proceed with NLP analysis on instant messengers.

• Proceedings of the Korean Information Science Society Conference
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• 2012.06a
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• pp.66-67
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• 2012

소셜 네트워크 서비스에 대한 관심이 높아지고 있으며 이의 하나로 인스턴트 메신저를 이용한 통합 커뮤니케이션 서비스의 필요성이 커지고 있다. 본 논문은 이러한 요구사항 중 그룹 내 회의를 진행하는 데 필요한 정보의 생성, 전송 및 저장을 위한 기능을 XMPP 기반 인스턴트 메신저 형태로 구현하였다.

• Journal of Global Scholars of Marketing Science
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• v.15 no.1
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• pp.1-20
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• 2005

The object of this study is to explore factors affecting customer satisfaction and customer loyalty of instant messenger service. We propose that service qualities (tangibility, assurance, responsiveness, empathy, reliability) affect customer satisfaction of instant messenger service, customer satisfactions do customer loyalty. As moderating factors of the relationship between customer satisfaction and customer loyalty, switching costs are suggested. To accomplish the object of this study data are collected from instant messenger user by survey research. We analyse the research model using structural equation model and moderated multiple regression. The result are as follows: (1) tangibility and responsiveness affect customer satisfaction. (2) customer satisfaction affects customer loyalty. (3) switching costs moderated the relationship between customer satisfaction and customer loyalty.

• Proceedings of the Korean Information Science Society Conference
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• 2004.04a
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• pp.871-873
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• 2004

인스턴트 메신저는 데스크탑 PC뿐 아니라 PDA, 핸드헬드 PC 같은 개인용 무선정보기기에서도 활발하게 이용되고 있다. 그러나 대부분의 메신저가 데스크탑 환경을 고려한 기능을 그대로 사용하기 때문에 이동성이 있는 무선 환경에서는 활용성이 떨어지고, 사용하기에 불편한 단점이 있다. 본 논문에서는 리눅스 환경에서 사용자 음성인증로그인, RF 모듈을 이용한 자리비움 자동변환, 단문메시지서비스(Short Message Service) 등 무선 환경에서 필요한 기능을 제공하여 사용자 편리성을 제고한 무선 인스턴트 메시징 시스템의 설계와 구연에 대해 기술한다. 구현된 시스템은 과일전송과 단문메시지서비스를 위한 재버(Jabber) 기반의 프록시와 SMS 송신모듈을 갖는 서버와 USM(Ubiquitous, Smart, Mobile) 클라이언트로 구성된다. USM 클라이언트는 본 논문에서 라이트 XML 파서를 내장하여 메시지 통신시 클라이언트의 작업량을 크게 줄여 우선 클라이언트 프로그램의 최적화를 꾀하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.11a
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• pp.687-690
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• 2011

본 논문에서는 인터넷의 급속한 확산으로 주로 컴퓨터를 매개로 하여 인간 사이에 발생하는 커뮤니케이션 CMC(Computer-Mediated Communication)와 관련된 많은 연구들이 이루어지고 이들을 활용하고 있는 시점에서, 커뮤니케이션 매체로 인식 되고 있는 인스턴트 메신저를 직접 구현한 결과를 기술하였다. 일반인에게 있어서 친분 교류 차원으로 행해지고 있는 인스턴트 메신저에 쪽지 전송, 일대일 및 다자간 채팅, 파일 전송, 파일 공유 등의 기능을 구현한 결과를 요약 정리한 논문으로, 본 구현결과를 활용하면 이를 이용하는 사용자는 실시간으로 다양한 유형의 커뮤니케이션을 수행함으로써 상호 간에 필요한 정보를 교환할 수 있다.

• Information and Communications Magazine
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• v.19 no.2
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• pp.111-120
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• 2002

• Journal of the Korea Institute of Information Security & Cryptology
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• v.29 no.3
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• pp.541-547
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• 2019

As leakage cases of personal information increase, the concern of personal information protection is also increasing. As a result, most applications encrypt and store sensitive information such as personal information. Especially, in case of instant messengers, it is more difficult to find database where is not encrypted and stored. However, this kind of database encryption acts as anti-forensic from the point of view of digital forensic investigation. In this paper, we analyze database encryption process of MalangMalang Talkcafe application which is one of instant messenger. Based on our analysis, we propose a decryption method and explain the meaningful information collected in the database.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.30 no.3
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• pp.397-403
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• 2020

With the convenience of real-time conversation, multimedia file and contact sharing services, most people use instant messenger, and its usage time is increasing. Because the messengers contain a lot of user behavior information data, in the digital forensic investigation, they can be very useful evidence to identify user behavior. However, some of useful data can be difficult to acquire or recognize because they are encrypted or deleted. Thus, in order to use the messenger data as evidence, the study of message decryption process and message recovery is essential. In this paper, we analyze the database encryption process of the instant messenger, MalangMalang Talkafe, and propose the method to decrypt it. In addition, we propose the methods to identify the deleted messages and recover from the volatile memory area.

• Journal of Internet Computing and Services
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• v.13 no.6
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• pp.17-24
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• 2012

The purpose of this study is to test the effect of personal communication activities using smart phone instant messenger during normal office hours on job performance in the workplace. To do this, empirical data were collected by conducting a field survey of smart phone users, and structural equation model was used for the purpose of analyzing the data acquired by the survey. A structural equation model was designed and constructed by such factors like personal instant messaging with the outside friends and co-workers on job performance. In addition, task characteristics set as a moderating effect between personal instant messaging with the outside friends/co-workers and job performance. The results of the analysis are summarized as follows; First, personal instant messaging with the outside friends generally has a negative effect on job performance, in addition in high task interdependence area the former has more effect on the latter. Second, personal instant messaging with co-workers has a positive effect on job performance.