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Differential power processing (DPP) structure present obvious advantages in improving the energy output and overall efficiency of a photovoltaic system under the partial shading conditions. This paper presents a novel minimum-power tracking (MPT) algorithm for the two-stage PV-PV DPP structure, where each PV is implemented with the maximum power point tracking (MPPT) control while the central control...
The Extensible Messaging and Presence Protocol (XMPP) is one of the most popular Instant Messaging (IM) protocols which uses a client-server working mode. This protocol uses different connection primitives for both client-to-server (c2s) and server-to-server (s2s) connections. It is actively used in mission-critical operations where the reliability and security of communication systems is always imperative...
Software-defined networking (SDN) addresses pressing networking problems such as network virtualization and data center complexity. By separating the control plane from the data plane, SDN introduces a new abstraction layer. This new abstraction layer is typically implemented by means of a so-called SDN controller. SDN applications can interact with the controller to ensure network functionality....
Background: Static analysis security testing (SAST) tools may be evaluated using synthetic micro benchmarks and benchmarks based on real-world software. Aims: The aim of this study is to address the limitations of the existing SAST tool benchmarks: lack of vulnerability realism, uncertain ground truth, and large amount of findings not related to analyzed vulnerability. Method: We propose Delta-Bench...
With the rapid development of information technology, campus card has become an important part of the construction of digital campus. Based on the campus card to build a user behavior analysis system, which can help the school to master the student school of learning, consumption and rest behavior. This article discusses the specific behavior of campus card consumption and the data mining and analysis...
We characterize the cache behavior of an in-memory tag table and demonstrate that an optimized implementation can typically achieve a near-zero memory traffic overhead. Both industry and academia have repeatedly demonstrated tagged memory as a key mechanism to enable enforcement of powerful security invariants, including capabilities, pointer integrity, watchpoints, and information-flow tracking....
Wireless Sensor Networks present several advantages when compared to wired ones, among them, the low consumption and simplicity of installation. In some cases, energy consumption may be so low as to allow the use of energy harvesting techniques, as in the case of EnOcean protocol. In other networks, it is necessary to meet specific requirements, such as in industrial ones, where communication must...
In many-core systems, the processing elements are interconnected using Networks-on-Chip. An example of on-chip network is SoCIN, a low-cost interconnect architecture whose original design did not take into account security aspects. This network is vulnerable to eavesdropping and spoofing attacks, what limits its use in systems that require security. This work addresses this issue and aims to ensure...
In this paper, we review the main middleware re-quirements applied to Internet of Things and High-Performance Computing combined, here called IoT/HPC. The goal was to describe a unique set of requirements that middleware systems should attempt to guarantee the development of integrated applications. Among many core complex services, the IoT/HPC challenges are related to the support of sensing, actuating,...
In this paper, we revisit multi-party Diffie-Hellman key exchange (DHKE) protocols by using multi-linear mappings and Weil pairings over elliptic curves. We show how to construct a 4-linear Weil pairing and illustrate the approach by examples. Finally, we present several necessary conditions to find a distortion map for a 5-party DHKE protocol.
Software security is an important aspect of ensuring software quality. Early detection of vulnerable code during development is essential for the developers to make cost and time effective software testing. The traditional software metrics are used for early detection of software vulnerability, but they are not directly related to code constructs and do not specify any particular granularity level...
With the increase in the instances of damage caused by counterfeits of electronic components, a Physical Unclonable Function (PUF) has attracted attention as a technique to prevent counterfeiting. PUF uses arbitrary dispersion as specific identification, which is generated during semiconductor manufacturing. Even if all LSI circuit patterns are copied, PUF can discriminate the LSI circuit from counterfeits...
Internet-based online cloud services provide enormous volumes of storage space, tailor made computing resources and eradicates the obligation of native machines for data maintenance as well. Cloud storage service providers claim to offer the ability of secure and elastic data-storage services that can adapt to various storage necessities. Most of the security tools have a finite rate of failure, and...
The accuracy provided by traditional sampling-based monitoring approaches, such as NetFlow, is increasingly being considered insufficient to meet the requirements of today's networks. By summarizing all traffic for specific statistics of interest, sketch-based alternatives have been shown to achieve higher levels of accuracy for the same cost. Existing switches, however, lack the necessary capability...
The number of software vulnerabilities discovered and publicly disclosed is increasing every year; however, only a small fraction of them is exploited in real-world attacks. With limitations on time and skilled resources, organizations often look at ways to identify threatened vulnerabilities for patch prioritization. In this paper, we present an exploit prediction model that predicts whether a vulnerability...
Testing designs implemented in a Field Programmable Gate Array (FPGA) against hardware-based attacks requires one to inject numerous classes of vulnerabilities (e.g., hardware Trojans) into the FPGA based designs. We developed a Tool for Automated INsertion of Trojans (TAINT) providing numerous benefits. First, TAINT can evaluate FPGA based designs against known and unknown attacks. Second, TAINT...
Reversible circuits are vulnerable to intellectual property and integrated circuit piracy. To show these vulnerabilities, a detailed understanding on how to identify the function embedded in a reversible circuit is crucial. To obtain the embedded function, one needs to know the synthesis approach used to generate the reversible circuit in the first place. We present a machine learning based scheme...
In this paper, we review big data characteristics and security challenges in the cloud and visit different cloud domains and security regulations. We propose using integrated auditing for secure data storage and transaction logs, real-time compliance and security monitoring, regulatory compliance, data environment, identity and access management, infrastructure auditing, availability, privacy, legality,...
There is little work which empirically analyses network management practice with respect to policy creation and maintenance. To address this gap we carried out five semistructured interviews of network administrators at a diverse range of enterprises. Analysis of the results led us to make the following contributions: We introduce a number of high-level orthogonal concepts (dimensions) for representing...
This study evaluates the current state of wireless network security in the CBD of Nuku'alofa. Wireless Networks have grown significantly since their introduction. Security protocols supplied with the wireless equipment have reached a level of strong and robust security. However, security remains a problem; this study aims to answer two questions. What is the status of wireless network growth and security...
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