Security challenges of small cell as a service in virtualized mobile edge computing environments

Research on next-generation 5G wireless networks is currently attracting a lot of attention in both academia and industry. While 5G development and standardization activities are still at their early stage, it is widely acknowledged that 5G systems are going to extensively rely on dense small cell deployments, which would exploit infrastructure and network functions virtualization (NFV), and push the network intelligence towards network edges by embracing the concept of mobile edge computing (MEC). As security will be a fundamental enabling factor of small cell as a service (SCaaS) in 5G networks, we present the most prominent threats and vulnerabilities against a broad range of targets. As far as the related work is concerned, to the best of our knowledge, this paper is the first to investigate security challenges at the intersection of SCaaS, NFV, and MEC. It is also the first paper that proposes a set of criteria to facilitate a clear and effective taxonomy of security challenges of main elements of 5G networks. Our analysis can serve as a staring point towards the development of appropriate 5G security solutions. These will have crucial effect on legal and regulatory frameworks as well as on decisions of businesses, governments, and end-users

An exploratory randomized controlled trial evaluating text prompts in Lebanon to encourage health‐seeking behavior for hypertension

Aims of the study The current study evaluates the effectiveness of an opportunistic mobile screening on the percentage of people who are aware of whether they may be hypertensive (in an observational study) and the effectiveness of reminder prompts on the percentage of people who seek further medical attention (in a randomized controlled trial). Methods used to conduct the study The screening of 1227 participants (529 female) was conducted during the registration period of the 2018 Beirut International Marathon in Lebanon. Next, 266 participants whose screening indicated hypertension (64 Female) were randomly allocated to a treatment group or a control group in a 1:1 fashion. The treatment group received a reminder prompt to seek further medical attention for their potential hypertension and the control group did not. The overt nature of the text message meant that participants in the treatment group could not be blinded to their group allocation. The primary outcome is participants’ self‐reports of whether they sought further medical attention. Results of the study For the opportunistic screening, a 25% prevalence rate and a 24% awareness rate of hypertension was indicated. A McNemar analysis suggested that the screening increased participant awareness (X2 (N =1227)=72.16, p <0.001). For the randomized controlled trial, 219 participants provided follow‐up data via a phone call (82% retention). A Chi‐squared analysis suggested that the reminder prompt successfully encouraged more participants to seek further medical attention, 45.5% treatment group vs. 28.0% control group (X 2(1, N =219)=7.19, p =0.007, φ =0.18). Conclusions drawn and clinical implications Extra support in the form of a brief reminder message can increase the percentage of people who seek further medical attention after attending an opportunistic screening at a marathon event. The discussion reviews how the results align with previous research, strengths and limitations of the current study, and implications for future research and practice

The battle over Syria's reconstruction

Reconstruction is becoming the new battleground in the Syrian conflict—its continuation by other means. It is instrumentalized by the regime as a way to reconsolidate its control over the country and by rival regional and international powers to shape the internal balance of power and establish spheres of influence in the country. The paper examines the Asad regime’s practices, including co-optation of militia leaders via reconstruction concessions and use of reconstruction to clear strategic areas of opposition-dominated urban settlements. The paper then surveys how the geopolitical struggle in Syria has produced an asymmetry as regards reconstruction: those powers that lost the geo-political contest on the ground seek to use geo-economic superiority to reverse the geo-political outcome. Then the impact of proxy wars and spheres of influence in the country on the security context for reconstruction is examined. Finally, the reconstruction initiatives of the various external parties are assessed, including Russia, Iran and Turkey as well as the spoiler role by which the US seeks to obstruct reconstruction that would spell victory in Syria for its Russian and Iranian rivals.PostprintPeer reviewe

Enhancing the reconfigurability of special purpose machine tools using mechanical module interfaces

Purpose: The purpose of this paper is to introduce a solution that can enhance the reconfigurability of special purpose machines (SPMs). This is because SPMs can be used in different configurations and the reconfiguring time for these machines can be crucial. Therefore, it is important to reduce this time in order to enhance the performance of SPMs. Design/methodology/approach: A mechanical adapter is proposed as a solution to achieve the purpose of this paper. The design of the adapter is based on Multi Coupling (MC) type, and its functionality is based on “Plug and Produce”. This adapter is used to modify an SPM element called workpiece transfer in order to accommodate two types of chucks without the need to change the workpiece transfer. The performance criteria are analysed and investigated for this adapter. Findings: The proposed solution will enhance the reconfigurability of SPMs. This is because it will reduce the number of elements that are needed for reconfiguration. As a result, the time and cost for the reconfiguration will be reduced considerably. Research limitations/implications: Because SPMs have several types of elements, adapting the proposed solutions to be used for all elements can be a complex process. Therefore, more investigation and analysis need to be carried out in order to build a complete adapter system for SPMs. Practical implications: SPMs are already used widely in manufacturing. However, they are considered relatively expensive compared to the traditional machines tools because they are applied for special applications. The proposed solution will help to overcome this problem and make SPMs applicable for wider applications. Originality/value: The proposed solution is the first attempt in terms of enhancing the performance of SPMs. This can bring considerable benefits to the end users in manufacturing, who are using SPMs, in order to reduce the reconfiguration time and cost for these machine tools

Evaluation of Underlying Switching Mechanism for Future Networks with P4 and SDN (Workshop Paper)

Software Defined Networking (SDN) was introduced with a philosophy of decoupling the control plane from the data plane which facilitates network management while ensuring programmability in order to improve performance and monitoring. OpenFlow which enabled SDN was first introduced to match twelve header fields whilst at current it matches forty one which is expected to grow exponentially. Therefore future networks must have the ability to flexibly parse packets through a common interface. Programming Protocol independent Packet Processing (P4) was introduced to achieve the aforementioned by programming the underlying switch, providing instructions and utilizing APIs to populate the forwarding tables. A P4 programmed switch will forward packets through a parser into multiple stages of match+action tables to find the destination node which is considered the most efficient mechanism for routing. This paper takes into the account the latest platform developed for service providers, Open Networking Operating System (ONOS) to deploy two environments configured in the aforementioned technologies in order to test their performance. Four case studies were drawn which were simulated in Mininet which incorporated SDN + P4 switches. A significant increase of performances were recorded when compared with the performance of cases using SDN only