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International Conference on Cyberworlds

作者： A. Woodley S. Geva School of Software Engineering and Data Communications Faculty of Information Technology Queensland University of Technology Australia

XML information retrieval (XML-IR) systems aim to provide users with highly exhaustive and highly specific results. To interact with XML-IR systems, users must express both their content and structural requirement, in the form of a structured query. Traditionally, these structured queries have been formatted using formal languages such as XPath or NEXI. Unfortunately, formal query languages are very complex and too difficult to be used by experienced, let alone casual users. Therefore, recent research has investigated the idea of specifying users' content and structural needs via natural language queries (NLQs). In previous research we developed NLPX, a natural language interface to an XML-IR system. Here we present additions we have made to NLPX. The additions involve the application of transformation-based error-driven learning (TBL) to structured NLQs, to derive special connotations and group words into an atomic unit of information. TBL has successfully been applied to other areas of natural language processing; however, this paper presents the first time it has been applied to structured NLQs. Here, we investigate the applicability of TBL to NLQs and compare the TBL-based system, with our previous system and a system with a formal language interference. Our results show that TBL is effective for structured NLQs, and that structured NLQs a viable interface tor XML-IR systems

关键词： Natural languages XML Natural language processing Information retrieval Formal languages database languages Content addressable storage Computer errors software engineering data communication

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Agent-based privilege negotiation for E-commerce on World Wide Web

Lecture Notes in Computer Science (including subseries Lectu...

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Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2003年 2722卷 68-71页

作者： Au, Richard Yao, Ming Looi, Mark Information Security Research Centre School of Software Engineering and Data Communications Queensland University of Technology Brisbane QLD 4001 Australia

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A method for access authorisation through delegation networks

Conferences in Research and Practice in Information Technolo...

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Conferences in Research and Practice in Information Technology Series 2006年 54卷 165-174页

作者： Jøsang, Audun Gollmann, Dieter Au, Richard School of Software Engineering and Data Communications QUT Brisbane Australia Distributed Systems Security Group Hamburg University of Technology Germany

ISBN: (纸本)1920682368

Owners of systems and resources usually want to control who can access them. This must be based on having a process for authorising certain parties, combined with mechanisms for enforcing that only authorised parties are actually able to access those systems and resources. In distributed systems, the authorisation process can include negative authorisation (e.g. black listing), and delegation of authorisation rights, which potentially can lead to conflicts. This paper describes a method for giving authorisations through a delegation network, and where each delegation and authorisation is expressed in the form of a belief measure. An entity's total authorisation for a given resource object and access type can be derived by analysing the delegation network using subjective logic. Access decisions are made by comparing the derived authorisation measure with required threshold levels, which makes authorisations non-categorical. By setting the threshold level higher than the assigned measure of a single authorisation, it is possible to require multiple authorisations for accessing specific resources. The model is simple, intuitive and algebraic. © 2006, Australian Computer Society, Inc.

关键词： Access control

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Formally analysing a security protocol for replay attacks

Formally analysing a security protocol for replay attacks

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Australian Conference on software engineering

作者： B.W. Long C.J. Fidge School of Information Technology and Electrical Engineering University of Queensland Australia School of Software Engineering and Data Communications Queensland University of Technology Australia

The Kerberos-One-Time protocol is a key distribution protocol promoted for use with Javacards to provide secure communication over the GSM mobile phone network. From inspection we suspected a replay attack was possible on the protocol. To check this, we formally specified the protocol using Object-Z and then analysed its behaviour in the presence of an attacker using the symbolic analysis laboratory's model checker. To produce accurate results efficiently, our formalism included an abstraction of the protocol's data structures that captured just those characteristics that we believed made the protocol vulnerable. Ultimately, the model checker's analysis confirmed our suspicions about the protocol's weakness

关键词： GSM Australia Java Mobile handsets data security software engineering Inspection data structures Access protocols Formal specifications

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A secure anonymous authorisation architecture for e-commerce

A secure anonymous authorisation architecture for e-commerce

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IEEE International Conference on e-Technology, e-Commerce and e-Service

作者： W.-K.R. Au K.-K.R. Choo M. Looi Information Security Research Centre School of Software Engineering and Data Communications Queensland University of Technology QLD Australia

We propose a new authorisation architecture based on the extension to the anonymous authorisation framework proposed by Au et al., whereby a new entity, trustee, and a new concept, key binding certificate (KBC), are introduced. In the architecture, the trustee issues a KBC to certify the association between a registered user's unique identity and the user's one-task authorisation key (OTAK) where OTAK is used as the user's unique identifier to preserve anonymity. More importantly, the trustee acts as an identity escrow agent to provide anonymity revocation in a well-regulated manner. Hence, any service provider is able to make authorisation decision based on the anonymous attribute certificates (AACs) issued by referee servers to anonymous users with a high level of assurance. The trustee also empowers the notion of chained referral in situations where users are required to obtain AACs from various referee servers. An improved protocol is also proposed, accompanied by an outline of its security analysis.

关键词： Authorization Web server Privacy Access control Identity management systems Gold IP networks Security Resource management Computer architecture

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Privilege negotiation agents for distributed authorisation on World Wide Web

Privilege negotiation agents for distributed authorisation o...

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IEEE/WIC/ACM International Conference on Intelligent Agent Technology (IAT)

作者： R. Au Ming Yao M. Looi Information Security Research Centre School of Software Engineering and Data Communications Queensland University of Technology QLD Australia

Privilege negotiation agents migrate from the security servers of different administrative domains on the Internet to the user's secure client agent environment. They work cooperatively for trust establishment and authorisation in an automated way. Agent communication protocols are expressed through the Knowledge Query and Manipulation Language (KQML). Security issues for interaction between agents are discussed. The user-centred approach enables a user to enforce his own privacy policies during the privilege negotiation process.

关键词： Authorization Web sites Access protocols Access control Environmental management Information security Privacy Web and internet services Credit cards Conference management

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Gray-scale transformation for traffic classification: leveraging local and global features in flow data 3

Gray-scale transformation for traffic classification: levera...

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3rd International Conference on Electronic Information engineering, Big data, and Computer Technology, EIBDCT 2024

作者： Xia, Yuchao Xue, Mutian Li, Wei Network and Data Security Key Laboratory of Sichuan Province School of Information and Software Engineering University of Electronic Science and Technology of China Chengdu China University of Electronic Science and Technology of China Chengdu China Sichuan University of Media and Communications Chengdu China

ISBN: (纸本)9781510680449

The rapid expansion and diversification of internet traffic pose a pressing demand for accurate classification of diverse application streams in network management and security monitoring. This paper introduces a deep learning-based method for precise classification of diverse internet application streams in network. By transforming raw traffic data into grayscale images and utilizing Convolutional Neural Networks (CNNs) and the Swin-Transformer framework, critical information is extracted at both local and global feature levels. The core of this method is offering a visual representation of the structure and content of traffic data. This visual representation enables subsequent feature extraction and classification. Through experimentation across various applications including email, Skype, YouTube, Vimeo, FTP, and Facebook, the proposed method in traffic classification is demonstrated to be effective. This approach boosts traffic classification accuracy, offers innovation in network management and security monitoring, and holds vital importance in optimizing network performance and security. Additionally, it sets the stage for future research in networking data processing and security methodologies. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

关键词： Network security

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Model checking interrupt-dependent software

Model checking interrupt-dependent software

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Asia-Pacific Conference on software engineering

作者： C. Fidge P. Cook School of Software Engineering and Data Communications Queensland University of Technology QLD Australia School of Information Technology and Electrical Engineering University of Queensland QLD Australia

Embedded control programs are hard to analyse because their behaviour depends on how they interact with hardware devices. In particular, embedded code typically uses interrupts to respond to external events in a timely manner. Such asynchronous control constructs make static analysis difficult due to the potentially large number of alternative control-flow paths they allow. We show how model checking can be used to effectively analyse the behaviour of interrupt-dependent programs. This is done by developing an abstraction of the code that captures its essential timing and functional properties, including those related to external interrupts. The model is made efficient by grouping program instructions into basic blocks whose behaviour is atomic with respect to interrupts.

关键词： Hardware software engineering Australia Aerospace electronics data communication Information technology Communication system control Information analysis Timing Safety

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Capturing Evolving Patterns for Ontology-based Web Mining 04

Capturing Evolving Patterns for Ontology-based Web Mining

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IEEE WIC ACM International Conference on Web Intelligence (WI)

作者： Yuefeng Li Ning Zhong School of Software Engineering and Data Communications Queensland University of Technology Australia Department of Systems and Information Engineering Maebashi Institute of Technology Japan

ISBN: (纸本)9780769521008

An ontology-based Web mining model tends to extract an ontology from user feedback and use it to search the right data from the Web to answer what users want. It is indubitable that we can obtain numerous discovered patterns using a Web mining model. However, some discovered patterns might include uncertainties when we extract them. Also user profiles are changeable. Therefore, the difficult issue is how to use and maintain the discovered patterns. This paper presents a theoretical framework for this issue, which consists of automatic ontology extraction, reasoning on the ontology and capturing evolving patterns. The experimental results show that all objectives we expect for the theoretical framework are achievable.

关键词： Ontologies Web mining

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Automatic Pattern-Taxonomy Extraction for Web Mining 04

Automatic Pattern-Taxonomy Extraction for Web Mining

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IEEE WIC ACM International Conference on Web Intelligence (WI)

作者： Sheng-Tang Wu Yuefeng Li Yue Xu Binh Pham Phoebe Chen School of Software Engineering and Data Communications Queensland University of Technology QLD Australia School of Information Technology Deakin University VIC Australia

ISBN: (纸本)9780769521008

In this paper, we propose a model for discovering frequent sequential patterns, phrases, which can be used as profile descriptors of documents. It is indubitable that we can obtain numerous phrases using data mining algorithms. However, it is difficult to use these phrases effectively for answering what users want. Therefore, we present a pattern taxonomy extraction model which performs the task of extracting descriptive frequent sequential patterns by pruning the meaningless ones. The model then is extended and tested by applying it to the information filtering system. The results of the experiment show that pattern-based methods outperform the keyword-based methods. The results also indicate that removal of meaningless patterns not only reduces the cost of computation but also improves the effectiveness of the system.

关键词： Web mining data mining Information filtering Information filters Taxonomy Association rules data processing Text mining software engineering data communication

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