The need for a secure communication between two entities in a system is mandatory to protect the trustworthiness of the system. For example, consider an embedded system inside an automobile where two Electronic Control Units (ECUs) attached to a bus are communicating with each other. Such a system is rather secure against attacks from each other because the two ECUs and thus the tasks executing on them are physically separated from each other by design. However, this is not the case when two tasks, one of them being safety/security critical, execute on the same ECU in parallel because it opens an opportunity for a mutual impact by the tasks, for example, due to a shared resource such as the local memory. Thus, the goal of this contribution is to establish a secure isolation between such tasks to avoid an un-authorized communication and thus to build a trusted embedded system. Though, there exist approaches in the literature, for example, based on virtualization technology and others to address this issue, either they are only softwarebased or not suitable for embedded systems. In contrast, the proposed approach in here is not only hardware-based, which is more secure, but also lightweight in its design. In specific, the proposed approach, utilizes a security module with minimal Trusted Computing (TC) technology features tailored to the needs of a resource constrained embedded system. Additionally, a proof-of-concept implementation of the proposed approach is performed to illustrate the design feasibility.
The currently developed 5G networks using MEC technology (5G MEC) allow for the harmonious cooperation of many areas of the economy (called the vertical industries) within an integrated information network. Providing the necessary security in such a complex configuration of business partners requires the design of consistent and effective security architecture. In this paper, we present a new concept of an access control architecture for the 5G MEC network in line with the 5G network model and MEC architecture proposed by international standardization organizations. We give an overview of the high-level security architecture of 5G MEC networks, which provides security solutions for the network’s components and establishes secure access to all cooperating entities. Next, we introduce the MEC Enabler, a new network’s module, which manages security credentials required to access resources of MEC-hosted services. We consider a series of several use cases with increasing demands on network data resources and computing power. Finally, we present a sample protocol diagram for gaining access to resources (authentication in a service using MEC technology) in our access control architecture.
Physically Unclonable Functions (PUFs) are popular hardware-based security primitives that can derive chip signatures from the inherent characteristics of ICs. Due to their assumed security and cost advantages, one important category of PUFs, so-called weak PUFs which is used in numerous security applications such as device ID generation, IP protection and secure key storage. Nevertheless, a number of recent works have been reported several attacks on weak PUFs architectures. This paper presents a brief survey of existing attacks on silicon-based weak PUF architectures with their detailed comparison and associated countermeasures.
In this letter, we investigate Orthogonal Time Frequency Space (OTFS) modulation, a newly proposed modulation scheme for emerging wireless communication applications in time-frequency selective channels, from symbol detection perspective. The studies identify the advantages of OTFS performance over OFDM in many aspects, such as data rate increase in high mobility. Another advantage is the sparsity of the channel produced by OTFS that allows using low-complexity algorithms for the detection of the data. We provide the analysis on the baseband OTFS system and then analyze the Message Passing algorithm for OTFS symbol detection. We analyze the effects of damping factor and channel taps on the performance of the system. Simulation results show the error performance of the OTFS system under various channel conditions.
