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5th International Conference on Computational Intelligence and Intelligent Systems, CIIS 2022

作者： Sithungu, Siphesihle P. Ehlers, Elizabeth M. Academy of Computer Science and Software Engineering University of Johannesburg South Africa

ISBN: (纸本)9781450397612

AdaptiveSGA is a method for achieving Adaptive Game Artificial Intelligence-Based Dynamic Difficulty Balancing through the Symbiotic Game Agent Model. Previous work has shown that AdaptiveSGA can achieve Dynamic Difficulty Balancing in simulated soccer by effectively changing a team's strategy based on the opponent's performance. AdaptiveSGA pre-existing strategies and switches between them during runtime to increase the game's replayability by adapting the challenge it poses to the human player. Although this method works, its limitation is that if the human player surpasses the most intelligent strategy of the computer opponent, there is no way for the model to generate a new strategy during runtime that can potentially overcome the human player. AdaptiveSGA can only maintain engagement with the human player if the human player has not overcome the best strategy for the pool of pre-existing strategies. Current work addresses this limitation by introducing an Evolution Symbiont Agent whose purpose is to generate new strategies in real-time (during gameplay) through evolutionary mechanisms using Gene Expression Programming. Experimental results show that the presence of the evolution symbiont agent can use Gene Expression Programming to generate strategies capable of outperforming an opposing strategy. © 2022 ACM.

关键词： Gene expression

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Committed-programming reductions: formalizations,implications and relations

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science China(Information sciences) 2024年第10期67卷 151-171页

作者： Jiang ZHANG Yu YU Dengguo FENG Shuqin FAN Zhenfeng ZHANG State Key Laboratory of Cryptology Department of Computer Science and Engineering Shanghai Jiao Tong University Trusted Computing and Information Assurance Laboratory Institute of SoftwareChinese Academy of Sciences

In this work, we introduce a class of black-box(BB) reductions called committed-programming reduction(CPRed) in the random oracle model(ROM) and obtain the following interesting results:(1) we demonstrate that some well-known schemes, including the full-domain hash(FDH) signature(Eurocrypt1996) and the Boneh-Franklin identity-based encryption(IBE) scheme(Crypto 2001), are provably secure under CPReds;(2) we prove that a CPRed associated with an instance-extraction algorithm implies a reduction in the quantum ROM(QROM). This unifies several recent results, including the security of the Gentry-Peikert-Vaikuntanathan IBE scheme by Zhandry(Crypto 2012) and the key encapsulation mechanism(KEM) variants using the Fujisaki-Okamoto transform by Jiang et al.(Crypto 2018) in the ***, we show that CPReds are incomparable to non-programming reductions(NPReds) and randomly-programming reductions(RPReds) formalized by Fischlin et al.(Asiacrypt 2010).

关键词： provable security random oracle model quantum random oracle model black-box reduction/separation programmability

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Time-intervals-related pattern selection for continuous event prediction

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Pattern Recognition 2025年

作者： Nevo Itzhak Szymon Jaroszewicz Robert Moskovitch Software and Information Systems Engineering Ben-Gurion University of the Negev Beer Sheva Israel Institute of Computer Science Polish Academy of Sciences Warsaw Poland Faculty of Mathematics and Information Science University of Technology Warsaw Poland

Symbolic time intervals (STIs) are used in different domains to represent real-life events with varying duration, like traffic light timing or medical treatments. Multivariate temporal data may include STIs and event-driven or manual measurements, such as traffic accidents or blood tests. This study proposes temporal abstraction to uniformly represent such heterogeneous multivariate temporal data (time point values, instantaneous events, or time intervals) using STIs and develop a model to continuously predict events of interest. We introduce the use of multiple TIRPs that end with an event of interest for continuous prediction while using multiple TIRP instance completion predictors simultaneously. Since often there are dozens of discovered patterns, in this paper, we introduce novel discriminative pattern selection metrics, such as the differences in the frequencies or duration between the entities (e.g., patients) having or not having the event of interest. The proposed methods achieved an average improvement of 5% AUROC over LSTM-FCN, the best-performed baseline model, out of the evaluated baseline models (RawXGB, Resnet, LSTM-FCN, and ROCKET) that were applied to the raw medical and non-medical datasets. The proposed continuous event prediction method has the potential for broad real-world and real-time applicability in diverse domains with heterogeneous multivariate temporal data, such as early panic attack prediction using wearable devices or early complication prediction in intensive care unit patients.

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Vulnerability testing in the development cycle 16

Vulnerability testing in the development cycle

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16th European Conference on Cyber Warfare and Security, ECCWS 2017

作者： Van Rensburg, Alice Von Solms, Sebastiaan Academy of Computer Science and Software Engineering Faculty of Science University of Johannesburg South Africa

ISBN: (纸本)9781911218432

Web applications have been the target of endless attacks which reach unprecedented levels every year. The root cause of such exposures are vulnerabilities found within web applications. Despite applying various mitigating measures, including security best-practises, more than 78% of scanned web applications contain several vulnerabilities yearly. Surveys done by specialists in this field, found that the effect of security best-practises in the Secure software Development Life Cycle (S-SDLC) are situation dependent and suggest a comprehensive metrics program which performs ongoing measurement of the security posture of a web application, tracks progress over time and in so doing, serves as a guide for which of the SDLC-related activities should be effective. This paper extends the S-SDLC with an additional security measure namely: vulnerability testing in the implementation phase and introduces the prototype, "Vulnerability Test Network Prototype", hereafter referred to as VTNP, which implements the new security measure. The VTNP determines the security posture of a web application as early as possible in the implementation phase, specifically during the continuous build (CI) process, and does this continuously as the web application is enhanced and changed. In so doing, the VTNP provides the information for tracking and measuring the security posture of a web application and guides appropriate actions to be taken. This means that vulnerability testing is conducted during the construction of a web application, specifically after a change or enhancement is made to the web application. Discovering vulnerabilities in the development cycle, alerts developers of vulnerabilities whilst the web application is under construction, enables remediation of vulnerabilities before any software is released and prevents vulnerable code from being perpetuated. Linking vulnerability assessments to the code changes makes targeted remediation possible and provides a database of historic

关键词： Life cycle

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The Emergence of IIoT and its Cyber Security Issues in Critical Information Infrastructure 21

The Emergence of IIoT and its Cyber Security Issues in Criti...

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21st European Conference on Cyber Warfare and Security, ECCWS 2022

作者： Bhaiyat, Humairaa Yacoob Sithungu, Siphesihle Philezwini Academy of Computer Science and Software Engineering Faculty of Science University of Johannesburg South Africa

ISBN: (纸本)9781914587405

The emergence of the Industrial Internet of Things (IIoT) can transform and improve industrial domain processes. This is achieved by IIoT’s ability to collect and process vast amounts of data using technology such as sensors. IIoT capabilities can improve the manufacturing processes of these sectors and contribute to the improved functioning of critical information infrastructure. In addition, current trends - such as the Fourth Industrial Revolution (4IR) - use IIoT to realise specific goals. While the emergence of IIoT systems does introduce many benefits, such as improved efficiency and sustainability, it can also introduce security concerns. These security concerns pose a significant threat to the industrial domain, including critical information infrastructures. The resulting threats emphasise the need to implement solutions to secure IIoT systems. The paper aims to discuss the emergence of IIoT and its cyber security issues within the context of critical information infrastructure. The research paper follows a theoretical research methodology to provide an improved understanding of the emergence of IIoT and its cyber security issues in critical information infrastructure. The paper contains an exhaustive discussion of what is IIoT. A discussion on where IIoT fits within the context of critical information infrastructure and its impact on 4IR is also highlighted in the paper. Due to the many vulnerabilities that IIoT systems can contain, the paper also discusses security concerns surrounding the emergence of IIoT. The security concerns make IIoT systems attractive targets for cyberattacks. Therefore, different approaches that can be applied to secure IIoT systems is also provided. Since IIoT capabilities can impact the critical information infrastructure of businesses and nations, the authors’ stance on how IIoT systems could transform the current understanding of critical information infrastructure is also discussed. © 2022 Curran Associates Inc.. All rights r

关键词： Internet of things

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Finding Data Tractable Description Logics for Computing a Minimum Cost Diagnosis Based on ABox Decomposition

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Tsinghua science and Technology 2010年第6期15卷 623-632页

作者：杜剑峰漆桂林 Jeff Z.Pan Guangdong University of Foreign Studies State Key Laboratory of Computer Science Institute of Software Chinese Academy of Sciences School of Computer Science and Engineering Southeast University Department of Computing Science the University of Aberdeen

Ontology diagnosis, a well-known approach for handling inconsistencies in a description logic （DL） based ontology, computes a diagnosis of the ontology, i.e., a minimal subset of axioms in the ontology whose removal restores consistency. However, ontology diagnosis is computationally hard, especially computing a minimum cost diagnosis （MCD） which is a diagnosis such that the sum of the removal costs attached to its axioms is minimized. This paper addresses this problem by finding data tractable DLs for computing an MCD which allow computing an MCD in time polynomial in the size of the ABox of a given ontology. ABox decomposition is used to find a sufficient and necessary condition to identify data tractable DLs for computing an MCD under the unique name assumption （UNA） among all fragments of that are at least as expressive as without inverse roles. The most expressive, data tractable DL identified is without inverse roles or qualified existential restrictions.

关键词： ontology diagnosis minimum cost diagnosis description logics data tractability

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An application-semantics-based relaxed transaction model for internetware

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science in China(Series F) 2006年第6期49卷 774-791页

作者： HUANG Tao DING Xiaoning WEI Jun Technology Center of Software Engineering Institute of Software Chinese Academy of Sciences Beijing 100080 China Key laboratory of Computer Science Institute of Software Chinese Academy of Sciences Beijing100080 China Graduate School of Chinese Academy of Sciences Beijing 100080 China

An internetware application is composed by existing individual services, while transaction processing is a key mechanism to make the composition reliable. The existing research of transactional composite service （TCS） depends on the analysis to composition structure and exception handling mechanism in order to guarantee the relaxed atomicity. However, this approach cannot handle some application-specific requirements and causes lots of unnecessary failure recoveries or even aborts. In this paper, we propose a relaxed transaction model, including system mode, relaxed atomicity criterion, static checking algorithm and dynamic enforcement algorithm. Users are able to define different relaxed atomicity constraint for different TCS according to application-specific requirements, including acceptable configurations and the preference order. The checking algorithm determines whether the constraint can be guaranteed to be satisfied. The enforcement algorithm monitors the execution and performs transaction management work according to the constraint. Compared to the existing work, our approach can handle complex application requirements, avoid unnecessary failure recoveries and perform the transaction management work automatically.

关键词： internetware service composition relaxed atomicity relaxed transaction mode.

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Animating turbulent water by vortex shedding in PIC/FLIP

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science China(Information sciences) 2013年第3期56卷 16-26页

作者： ZHU Jian LIU YouQuan CHANG YuanZhang WU EnHua Computer Graphics and Multimedia Laboratory(NG04) Faculty of Science and TechnologyUniversity of Macau School of Information Engineering Chang'an University State Key Laboratory of Computer Science Institute of SoftwareChinese Academy of Sciences

In this paper,we present a hybrid method,which integrates PIC/FLIP and vortex particle methods into a unified framework,to efficiently simulate vortex shedding that happens when fluids flow around internal *** improve efficiency and reduce the numerical dissipations,we first solve the governing equations on a coarse grid using PIC/FLIP,and then interpolate the intermediate results to a finer grid to obtain the base *** the regular particles in PIC/FLIP enter the boundary layer,if the specified conditions are satisfied to cause vortex shedding,they are selected as vortex particles by assigning additional vorticity related *** vortex particle dynamics are controlled by the vorticity form of NS equations,and several efficient methods are proposed to solve them on the finer ***,the obtained turbulence flow is added to the base *** a result,we are able to simulate turbulent water with rich wake details around the internal obstacles.

关键词： physically based fluid simulation turbulence vortex shedding vortex particle PIC/FLIP

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3-Dimensional Sensor Model in the Sensor Network

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电子学报(英文版) 2006年第2期15卷 324-328页

作者： LIN Zhiting QU Yugui ZHAI Yujia ZHAO Baohua Department of Electronic Engineering and Information Science University of Science and Technology of China Hefei 230027 China Laboratory of Computer Science Institute of Software Chinese Academy of Sciences Beijing 100080 China

Sensor webs consisting of nodes with limited battery power and wireless communication are deployed to collect useful information from a variety of environments. One fundamental issue in sensor networks is the coverage problem, which reflects how well a sensor network is monitored or tracked by sensors. In this paper, a new 3-dimensional model is proposed to adapt to the practicality, which distinguishes it from other general existing models. Not only the issue of sensor characteristic, terrain and preferential coverage of grid points are modeled but also the perceive limit is taken into account in this 3-dimensional model and the feasibility is tested by simulations. Specially, we assume there are three types of obstacles in the 3-dimensional sensor field, Non-grid obstacles (NGO), Grid obstacles with sufficient height (GOS), and Grid obstacles with insufficient height (GOI). And here, we propose an algorithm for the efficient coverage in a 3-dimensional sensor field. After finding the grid point which is covered least effectively, we find out not one but a number of nodes, which are eager to be improved. So these weaker nodes will be meliorated via algorithm INTEGER_LOCAL_COV, which has been compared with the primary algorithms via simulations and been shown to exhibit excellent performance.

关键词：无线传感网络三维传感模型盖度无线通信

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Constructing Edge-Colored Graph for Heterogeneous Networks

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Journal of computer science & Technology 2015年第5期30卷 1154-1160页

作者：侯睿武继刚陈亚文张海波隋秀峰 School of Computer Science and Software Engineering Tianjin Polytechnic University Tianjin 300387 China State Key Laboratory of Computer Architecture~ Institute of Computing Technology Chinese Academy of Sciences Beijing 100190 China Department of Computer Science University of Otago Dunedin 9054 New Zealand

In order to build a fault-tolerant network, heterogeneous facilities are arranged in the network to prevent homogeneous faults from causing serious damage. This paper uses edge-colored graph to investigate the features of a network topology which is survivable after a set of homogeneous devices malfunction. We propose an approach to designing such networks under arbitrary parameters. We also show that the proposed approach can be used to optimize inter-router connections in network-on-chip to reduce the additional consum!otion of energy and time delay.

关键词： network reliability homogeneous fault fault tolerance reconfigurable system network-on-chip

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