The proliferation of smartphones and the increase in consumption of multimedia content have spurred the growth of video production. However, despite this, online collaboration for video production still faces many unresolved problems in facilitating accurate communication among team members. Among these problems, video editing software can be time-consuming to save, and storing videos in dynamic environments can lead to quality degradation. This paper proposes a new method for addressing these problems by allowing team members to add and share information within videos at specific times and locations. The proposed method makes it easy to identify added markers without the need for special encoding and is designed to allow multiple people to add markers simultaneously. Furthermore, it is designed to enhance collaboration efficiency by enabling team members to exchange feedback without modifying the original video. Additionally, various effects are utilised to facilitate accurate tagging of videos, and an efficient communication means is provided during online video production, enabling precise tagging of multimedia content.

The Internet of Things (IoT) has become a common service backed up by sensors and actuators with the environment around us. IoT is expanding itself to different areas like Gartner, Inc. said that the IoT will include 26 billion units installed by 2020. We focused IR sensor to detect the heat and motion of people. We proposed a protocol that combines IR sensors and chairs to determine which people are sitting in their seats. We implemented it using the Arduino board, IR sensor and Bluetooth. We also implemented the smartphone app that administrator or clients check the result and contact with each other through it.

Nowadays, we produce massive digital data using smartphones and need to share them with others. However, we feel tired of sharing our personal information repeatedly since we live in the society where the excessive personal information is disclosed. We propose a protocol for the location-based one-time communication service using a beacon. In the service, people at the same place could meet at online to share some digital data without revealing their personal information. After meeting, any personal information does not be traceless to each other. People can communicate without disclosure of personal information.

Cloud system is a new computing technology for dealing with IT services at the Internet server system. In spite of its advantages in various aspects, it is not proper for IoT (Internet of Things) services that require high density and real time data processing. Fog computing is a new paradigm appropriate for decreasing data processing latency, managing the mobility, and increasing the service efficiency of IoT. However, there is a lot of security vulnerabilities for fog computing because of the lack of security related systems. In this work, we propose a group key management for the secure fog computing which can be adjusted dynamically based on the mobility of the IoT devices. Our proposed system can increase the system efficiency by controlling the IoT groups and the group keys management.

The Internet of Things (IoT) has been developing rapidly and inspiring numerous applications that can improve daily life. Among these, smart grid systems are expected to efficiently distribute energy and help address the energy shortage problem. However, grid data and information from heterogeneous embedded devices may result in security and communication problems in an IoT environment. Even in the situation where low-level information causes interoperability problems, the devices should be able to communicate with each other in a safe and efficient manner without a server or human intervention. In this paper, we propose a security-based context-aware smart grid system using an energy usage data aggregation and context awareness. Our proposal allows for intelligent decision-making and provides efficient smart grid system management based on machine knowledge. Using our proposed method, a smart grid system can provide robust and secure services, which can defend the system against various outside attacks.

Peer-to-Peer (P2P) service has gained a great popularity for content sharing among distributed users. Even if it brings a lot of attraction as a good content distribution method, security becomes a very critical issue because a service user needs to communicate with the other persons who could be untrustworthy. Traditional authentication mechanisms usually adopted public key mechanisms, and they are heavy and time consuming. Because of the randomness and mobility of mobile P2P service, the authentication should be lightweight and dynamic. In our work, we propose a mechanism based on visual cryptography and steganography for the mutual authentication between two users for P2P service, and for the P2P multicast service authentication. Our proposed authentication mechanism is lightweight and efficient because it is based on users' vision by adopting visual cryptography and steganography, and most computation for image generation is only concentrated on authentication server.

Recently, IPTV brings a lot of attraction because it is different from the traditional TV system in that it can provide the contents any time on users' demand. Many industries are starting new services based on IPTV expecting great growth of the market. From the static IPTV service, newer IPTV related service is considering openness. In Open IPTV, any user can send or receive the contents from another user, which means the customer can be the service provider at the same time. On top of the openness, mobility is another important concept to be considered in the IPTV industry. With the mobility and the openness, IPTV service has newer technical and security issues for reliable services. In this work, we propose a mutual authentication mechanism required between content provider and receiver. For communication, two users need to authenticate each other. Because of the openness and the mobility, the mechanism should be lightweight and dynamic. We have adopted Visual Cryptography and Steganography concept for efficient and lightweight authentication.

This paper presents a system that can provide the exact location of a mobile Internet device or a laptop in case it is lost or stolen. This system detects the IP state of the missing device while the user's laptop is operating. Information of an IP/MAC address that is changed is transmitted to the registered user's email. Using the IP address, it is also possible to see information about the more detailed physical address assigned by the ISP. Through the email that contains the current location information of the lost or stolen mobile device, the user can easily find it. In this paper, we propose an enhanced Java-based mobile device theft response system that drastically reduces the error range of the existing system.

With the advent of mobile devices and the convergence of wireless technologies and the Internet, both the content and the quality of research in this field are subject to regular change. A variety of state-of-the-art computing devices that are compatible with each other have been produced. These devices have the ability to interact with people. This is also known as pervasive computing. Particularly, as smartphones have recently become one of the most popular devices worldwide, various convenient applications are being released. Smartphones available today not only provide the ordinary internal processes such as dialing or receiving phone calls, sending text messages, and doing mobile banking, but also increasingly control various other devices that are part of our daily lives. In effect, this means that through smartphone applications, we can remotely control a variety of external devices such as televisions, projectors for presentations, computers, and even cars. The research in this paper is based on the evolving technological possibilities of using smartphone applications to control external devices. This paper presents the design and implementation of a remote lock system using wireless communication on a smartphone. In this context, remote lock system refers to a lock system that can be controlled remotely by a dedicated Android application. Every smartphone is equipped with Bluetooth which makes this technology possible. The application proposed in this paper uses the existing Bluetooth function on Android smartphones to open and manage locks. The users' lock information can be stored and managed in real time in the database via a server that is built and managed by a server manager. Even if users forget the password of the lock, our proposed lock system can guide them to retrieve it easily, and a user manual is included to help users navigate the system. This system also provides a variety of management functions such as adding, deleting, modifying, and purchasing the user's own locks.

An important application area for M2M (Machine to Machine) or IoT (Internet of Things) technology is smart grid system which plays an important role in electric power transmission, electricity distribution, and demand-driven control for the energy. To make the smart grid system more reliable and stable, security is the major issue to be provided with the main technologies. In this work, we propose an authentication mechanism between the utility system and the smart meters which gather the energy consumption data from electrical devices in layered smart grid system. Our proposal enhances the smart grid system integrity, availability and robustness by providing security with low overhead.

As an efficient and intelligent system for managing and monitoring electricity usage, the "smart grid" has many useful applications. It supports energy producers and energy consumers efficiently by supporting the estimation and provision of the proper amount of electricity at the proper time. The most serious threat to a smart grid system may be when information is altered or forged by attackers; the system could malfunction and could collapse. In some cases, the attackers could waste system resources on purpose and this could lead to disastrous results. In this paper, we propose security system architecture to provide the secure and reliable smart grid service. It includes a data authentication process to verify the aggregated data and virtual network management to detect a compromised area or node. It detects a false data injection attack and further prevents a denial of service attack efficiently with less overhead for the individual devices comprising the smart grid system.

최근 스마트폰 사용자들이 급격히 증가함에 따라 다양한 사회적 문제점들이 발생되고 있다. 대표적으로, 과도한 스마트폰의 사용과 잘못된 이용습관은 '스마트폰 중독(smartphone addiction)'과 '스마트폰 질병(smartphone disease)'과 같은 새로운 사회적 문제점들을 야기시키고 있다. 본 연구에서는 이러한 문제들을 사전에 예방하기 위해 스마트폰 사용자의 패턴을 방향센서를 이용해서 수집하고 분석해서 스마트폰 중독 및 질병을 예방하는 시스템을 제안한다. 제안된 시스템은 사용자의 스마트폰 사용형태와 사용시간을 실시간으로 분석하여 위험수준에 도달하였을 경우, 사용자에게 이를 알려 줌으로써 사용자 자신이 사전에 위험을 인지할 수 있도록 하며, 자신의 의지로 스마트폰 사용을 절제하도록 하여 스마트폰 중독 및 질병을 사전에 예방할 수 있도록 제안한다. In recent years, in accordance with the rapidly increasing number of smartphone users, various social problems have started to occur. Examples of these problems are the overuse of smartphones and bad usage habits of smartphone users that can cause new social problems such as smartphone addiction and other smartphone related diseases. With the aim of preventing these social problems, this paper proposes a new smartphone addiction and disease prevention system. This system was developed by collecting and analyzing smartphone usage patterns. This proposed system analyzes the usage patterns and working hours of smartphone users in real time. If the detected smartphone usage patterns reach a dangerous level, the system will send warning messages to the user. This will enable users to recognize the unhealthy situation in advance by themselves. In addition, this solution could possibly prevent smartphone addiction and other smartphone related illness by preventing overuse and encouraging abstinence from using smartphones to the extent that it becomes harmful to the user.

Openness has been added to IPTV (Internet Protocol Television) services in order for users not only to receive, but also to provide them. Open IPTV is expected to bring about great changes in the IPTV service area. Recently, mobility has also been added. However, because of its openness and IP network characteristics, security is one of the major issues hindering its commercialization. For IPTV, several security mechanisms for user authentication and content protection have been proposed to make the service reliable. However, these traditional security mechanisms cannot be adopted in the mobile IPTV area, because the security and system performance are influenced by numerous factors in the many-to-many environments. In our work, we propose a mechanism for secure user authentication and key distribution based on Kerberos for mobile open IPTV. Our proposal provides an efficient authentication process and the secure transmission of content among users, and further decreases the authentication time compared w...

One of major application service areas in M2M (Machine-to-Machine) is the smart grid system. In smart grid systems, information and communications technology are used to gather and act on information that is related to the behaviors of consumers and suppliers. The technology is to improve the efficiency, reliability, and economics of the production and distribution of electricity. To make the system more reliable, security is a very important issue. In this paper, we propose secure system architecture and a mechanism to provide security for smart grid system robustness and reliability.

In the ubiquitous environment, more and more devices are deployed in our daily life, and need to communicate with one another. M2M (Machine-to-Machine) communication is considered to be one of the major issues in future networks. M2M is expected to bring various benefits in wireless communications when it is interconnected with cellular networks. Considering the characteristics of cellular M2M networks, traditional security solutions are not proper to be applied to cellular M2M networks because the M2M network itself is vulnerable to various attacks. We consider security aspects for cellular M2M communications and propose a key management mechanism including the pairwise key and group key establishment. Our proposal could provide reliability and efficiency for the cellular M2M communication network in the secure manner.

As smartphones have recently become one of the most popular devices worldwide, various convenient applications are being released. Now smartphones not only provide the ordinary internal processes such as dialing or receiving phone calls, sending text messages, and doing mobile banking wherever we are, but they also are beginning to control various other devices that are part of our lives. Through the smartphone using mobile applications, we can remotely control a variety of external devices such as TVs, projectors for presentations, computers, and even cars. This paper presents the design and implementation of a remote lock system using wireless communications. The remote lock system is a lock system that can be controlled remotely by a dedicated Android application. The main function of the Android smartphone is equipped with Bluetooth so that a lock can be opened and managed via the application functions. The users' lock information in real time can be stored and managed in the database via a server that a server manager builds and manages. Even though users forget the password, our proposed lock system also guides them to find it easily, and provides the user's manual. Using this system, users can do a variety of management functions such as adding, deleting, modifying, and purchasing the user's own locks.

In mobile open Internet Protocol TV (IPTV) which is one of the major attracting technologies recently, the security is a key issue for reliable service, because the mobility and the openness in IPTV could cause much more vulnerabilities to various attacks compared with traditional IPTV services. In this paper, we propose an energy-efficient and secure channel group key establishment and rekeying management scheme for mobile open IPTV services. Our scheme provides the data authentication between an Evolved Node B (eNB) or a Base Station and the mobile devices for the security enhancement and efficiently rekeys the group key when the membership changes. Additionally, it proposes a pairwise key establishment mechanism for open IPTV services through eNBs. Our proposal can cope with the security vulnerability in mobile open IPTV services and guarantee the secure group key rekeying in addition to decreasing the storage and communication overhead.

Smart grid is a very efficient and intelligent system for managing and monitoring the electricity usage and it can be applied in many useful areas. It supports energy producers and consumers efficiently by supporting the estimation and provision of the proper amount of electricity in proper time. However, when the information is altered or forged by the attackers, it could cause the system malfunction. In addition to that, some attacks could waste the system resources on purpose and could lead to disastrous results. In this work, we propose a secure data aggregation mechanism providing verification of the aggregated data and detection of the compromised node to prevent the DoS(Denial of Service) attack based on the homomorphic encryption.

Smartphone usage and data consumption have been sharply rising, and the disabled have also become smartphone users as the number of users of these phones has exponentially increased in recent years. The theme of this paper is how to create a better world for the disabled using the information that people want to exchange with each other between the disabled and the general population. The main goal is also to provide the information that they need from each other in a way that can be displayed on the map in real-time. We propose a new location-based SNS application for the disabled population (except those who are visually impaired or the disabled who are not able to use a smartphone) with three major characteristics of this application to be considered as follows: (i) the person uses a Social Networking Service (SNS) by constructing a friend matching system such as Facebook or Twitter, which are the most widelyused SNS in the world; (ii) the general population registers real-time information for a specific location on the map for the disabled population using SNS. This information with photos and messages is given and evaluated by users; and (iii) this system makes it easier to see that the menu in the GUI was implemented.