• Convergence Security Journal
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• v.18 no.2
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• pp.25-32
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• 2018

As the use of smartphones become more common, the communication via instant messenger becomes natural. However, it is important to secure the relevant information promptly since the chat room between participants can be used as a space for a criminal conspiracy, and crime-related contents can be stored and deleted easily on smartphones. Therefore, this study aims to identify the available data and to use it as proof by comparing and analyzing the instant messengers with high usage rate.

• Journal of the Institute of Convergence Signal Processing
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• v.11 no.4
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• pp.255-262
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• 2010

Recently, we are living in the world of information and ubiquitous technology strayed away from the fixed network systems resulting in an increase of using mobile terminals which is convenient for mobility and functionality. Because the diversification of mobile devices to communicate between disparate mobile terminals is difficult, the two kinds of operating systems and hardware for data communication between the terminals is needed to convert the data. The proposed instant messenger design in MRP-S3C2440A (Windows CE 5.0) and Nexio XP30 (Windows CE .NET 4.1) were tested and applied. Usually the mobile terminal has an information on a central server. Sender terminal receives the message according to the characteristics of the terminal after converting was sent to the receiving terminal. Receiving-side terminal without a separate conversion process, it was the output terminals. This paper deals with the proposal and implementation of designing an instant messenger application program between the two different mobile terminals and network systems.

• Journal of Digital Convergence
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• v.12 no.11
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• pp.541-548
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• 2014

This study aims to examine how mobile instant messenger (MIM) usage pattern and MIM intensity influence MIM users' social capital. Total 253 MIM users in their 20's and 30's participated an online survey. Results showed that MIM frequency and network size affected bonding social capital. Meanwhile, MIM intensity was the only variable that influenced users' bridging social capital. Overall, the strength of strong ties in mobile media use was confirmed again. It was also confirmed that measuring the qualitative level of emotional attachment to the MIM (MIM intensity) was more important than gauging mere usage pattern when evaluating social capital enhancement through mobile media use.

• Journal of Digital Contents Society
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• v.13 no.3
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• pp.401-412
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• 2012

Communication through smartphones is creating a new paradigm of mobile communication beyond the restrictions of mobility and space. The mobile instant messengers of the smartphone, which began on the desktop environment, are providing various communication features, including multimedia contents, texts, and voice. Kindergartens and nurseries are using Websites, phones, SMS, printed materials, handwritten notifications, etc. to communicate with the parents. IsPlus was developed to facilitate the communication between the parents and the teachers, including exchanges of pictures and videos, chatting, and attendance management using smartphones. This is meaningful in that it is an early smartphone mobile messenger for educational institutions for infants and preschoolers. This study presented a new approach to the development of a mobile messenger for a specific group of users by analyzing the user environment, communication types, application planning process and interface design development using storytelling.

• Journal of the Korea Convergence Society
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• v.3 no.4
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• pp.7-13
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• 2012

The mobile instant messengers could change the lives of average citizens as much as did the telephone in the early part of the 20th century and television in the 1950s and 1960s. Researchers are debating whether the mobile instant messengers are improving or harming participation in community life and social relationships. For this study, 155 participants in two universities completed questionnaires pertaining to their own mobile instant messengers use and feelings of loneliness. We used survey data to examine the effects of the mobile instant messengers on social involvement and psychological well-being. In this sample, the mobile instant messengers were used extensively for communication. Results suggest that greater use of the mobile instant messengers were associated with declines in participants' communication with the people around which in turn increases their loneliness. These findings have implications for research and for the design of technology.

• Journal of Digital Convergence
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• v.12 no.2
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• pp.79-88
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• 2014

The mobile instant messengers could change the lives of average citizens as much as did the telephone in the early part of the 20th century and television in the 1950s and 1960s. Researchers are debating whether the mobile instant messengers are improving or harming participation in community life and social relationships. For this study, 155 participants in two universities completed questionnaires pertaining to their own mobile instant messengers use and feelings of loneliness. We used survey data to examine the effects of the mobile instant messengers on social involvement and psychological well-being. In this sample, the mobile instant messengers were used extensively for communication. Results suggest that greater use of the mobile instant messengers were associated with declines in participants' communication with the people around which in turn creases their loneliness. These findings have implications for research and for the design of technology.

• Proceedings of the Korean Society of Computer Information Conference
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• 2013.07a
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• pp.89-91
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• 2013

모바일 사용자가 모바일에서 머무르는 시간이 점점 급증함에 따라 카카오톡, 라인 등의 모바일 인스턴트 메신저 시장이 급성장 하였다. 지금까지 대부분의 정보시스템연구 분야에서는 사용자의 재사용 의도나 지속사용에 대한 많은 연구가 진행되어 왔으나 특정 시스템을 실질적으로나 감정적으로 의지하는 단계인 의존도에 대한 연구는 미흡하다. 본 연구에서는 기술수용모형, 정보시스템 성공모형을 기반으로 모바일 인스턴트 메신저 의존도에 선행요인들을 밝힘으로써, 사용자의 모바일 인스턴트 메신저 의존과정을 전반적으로 설명하였다.

• 한국HCI학회:학술대회논문집
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• 2007.02b
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• pp.21-26
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• 2007

유선 인터넷에서 인스턴트 메신저는 간단한 질문/확인, 만남이나 작업 조정, 사회적인 친교 등을 위해 광범위하게 활용되고 있다. 이를 무선으로 확장하기 위하여 MSN, Yahoo, AIM, ICQ, 버디버디, 네이트온 등이 모바일용 메신저를 내놓고 있다. 특히 한국 10대의 경우 SMS를 실시간 대화에 가깝게 (짧고 빈번하게) 사용하고 있기 때문에 무선 메신저는 큰 호응이 있으리라 예상하였다. 그러나 네이트온 모바일 메신저의 경우, 2002년 출시된 이후 별다른 인기를 끌지 못하고 있다. 이에 저자들은 네이트온 사용자들의 사용행태를 분석하여 문제점을 파악하고, 일반 SMS 사용자들과 네이트온 사용자들의 무선 커뮤니케이션 사용행태를 1주일간의 Diary Study에 기초한 Contextual Inquiry (Intermittent)를 실시하여 사용률이 저조한 이유를 분석한 뒤, 퍼소나를 구성하여 무선 환경에 맞는 완전히 혁신적인 새로운 형태의 무선 메신저 사용자 인터페이스를 설계하였다. 메신저에 반드시 있는 사용자 등록이나 친구 추가 기능을 없애고 휴대전화 번호 기반으로 동작하며, 상태 정보(Presence)를 없애면서 상대방 상태에 따라 IM 혹은 SMS로 적절히 변환되어 전달되는 것이 주요 특징이다. 이를 사용자들을 통해 다시 검증해 본 결과 사용자들이 무척 쉽게 받아들이는 것을 발견하였다.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.30 no.3
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• pp.405-415
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• 2020

With the increase in smartphone user, mobile forensics has become an essential element in modern digital forensic investigation. Mobile messenger data is very important data in mobile forensics because it can acquire information such as user's life pattern and mental state. In order to analyze messenger data, a decryption technique of an encrypted messenger data is required. Since most messengers provide a message deleting function, a technique for recovering deleted messages is required. WeChat Messenger, a messenger used by about 1 billion people around the world, uses IMEI (International Mobile Equipment Identity) information to encrypt data and provides message deletion function. In this paper, we propose a data decryption method in the absence of IMEI information and propose a method for recovering deleted messages using FTS (Full Text Search) database created for full-text search function of SQLite database.

• Journal of Korean Society for Quality Management
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• v.43 no.4
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• pp.545-558
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• 2015

Purpose: The Purposes of this study are (1) to examine why users are communicating through MIM (2) to understand what factors impact these users' satisfaction and loyalty. Methods: We use a questionnaire survey to collect 256 data on users' perceptions of Kakaotalk. We also use a structural equation modeling method by using AMOS 18.0. Results: Company trust, communication voice, connectedness, and perceived network size are found to be statistically significant factors affecting. Also, satisfaction influence on word of mouth and intention to switch. Conclusion: This study develops a research model from the MIM context. We suggest three points of view as company characteristics, device interactivity, and social factor. We examine the determinants of users' satisfaction and loyalty. The results can offer valuable insights for future mobile services research.