Due to rapid developments in mobile technologies as well as various embedded multimedia features, user created mobile contents are on the increase, in terms of both quality and quantity, and at the same time are shared in real time. To keep pace with such trends, a new networking technology called content-centric networking has appeared. However, it does not consider the extra requirements to support device movements. Thus, this article proposes a mobility management scheme for CCN to provide faster service access latency and lower routing overhead.

Due to the recent developments in mobile network technology and the supply of mobile devices, services that require high computing power and fast access speed, such as machine learning and multimedia streaming, are attracting attention. Mobile Edge Computing (MEC) has emerged. MEC allows servers to be located close to users to efficiently handle these services and provides users with ultra-low latency content delivery and powerful computing services. However, there has been a lack of research into the architecture required to efficiently use the computing power and resources of MEC. So, this paper proposes hierarchical MEC architecture in which MEC servers (MECS) are arranged in a hierarchical scheme to provide users with rapid content delivery, high computing performance, and efficient use of server resources.

Rapid developments in mobile technology have transformed mobile phones into personal multimedia devices. Due to these advancements, user created mobile content is on the increase, both in terms of quality and quantity. In addition, content sharing is getting popular in home networks as well as in social community networks. To keep pace with such movements, the new networking technology named as content centric networking (CCN) optimized for content sharing has appeared. However, it has little consideration for mobile consumer devices. So, this paper indicates that the proxy-based CCN scheme can provide lower communication overhead, shorter download time, and lower energy consumption in mobile environments.

The aim of the all-IP architecture in third-generation wireless networks is to allow operators to deploy IP technology in delivering third-generation services, that is, an architecture based on packet technologies and IP telephony for simultaneous real-time and non-real-time services. We present a new handoff management scheme that utilizes simultaneous multiple bindings in IP-based 3G wireless networks. The proposed handoff scheme minimizes packet losses and incurs negligible delays during handoff. We also present an adaptive resource allocation scheme that allocates connection resources to incoming calls depending on the network conditions. The resources accumulated by bandwidth degradation for on-going calls are utilized to minimize dropping probability of handoff calls and blocking probability of new calls

Ransomware, which is one type of malware, encrypts a user's files on a device and then requires the user to pay a ransom to recover the damaged files. The amount of ransomware is growing so rapidly that it constituted more than 70% of the malware found in 2017. Although many ransomware solutions have been released, similar to traditional antimalware solutions, most ransomware solutions are designed based on a blacklist that includes the code signatures of known ransomware. However, such blacklist-based solutions cannot prevent unknown ransomware, which may be either new or a variation of an existing ransomware. Another solution is to continuously monitor the abnormal behavior of every software program running on a user's device. To do so, some solutions monitor the executing programs that access the files stored on a device, while other solutions specify a folder as a safe folder and control executing programs when they access the objects in the folder. However, these solutions can degrade the performances of devices or inconvenience users. This article presents a new solution to detect/prevent ransomware using a whitelist. We analyze the file operation procedures of a user-device operating system and then implement a whitelist-based access control as a partial file operation procedure. Since the solution utilizes a whitelist and not a blacklist, it does not need to patch in the information on new ransomware regularly provided by a ransomware solution provider. Therefore, it can prevent both unknown and future ransomware in real time.

The increase of user generated mobile content raises the need of mobile content sharing. Moreover, content centric networking (CCN) is known for the new efficient network architecture appropriate for con tent sharing. However, it has little consideration for mobile devices. So, this paper indicates that the proxy-based CCN scheme can provide lower communication overhead and shorter download time in mobile environments.