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检索条件"任意字段=Proceedings of the Eighth ACM Conference on Data and Application Security and Privacy"

共 561 条记录，以下是131-140 订阅

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Spend Your Budget Wisely: Towards an Intelligent Distribution of the privacy Budget in Differentially Private Text Rewriting 25

Spend Your Budget Wisely: Towards an Intelligent Distributio...

引用

proceedings of the Fifteenth acm conference on data and application security and privacy

作者： Stephen Meisenbacher Chaeeun Joy Lee Florian Matthes School of Computation Information and Technology Technical University of Munich Garching Germany

ISBN: (纸本)9798400714764

The task of Differentially Private Text Rewriting is a class of text privatization techniques in which (sensitive) input textual documents are rewritten under Differential privacy (DP) guarantees. The motivation behind such methods is to hide both explicit and implicit identifiers that could be contained in text, while still retaining the semantic meaning of the original text, thus preserving utility. Recent years have seen an uptick in research output in this field, offering a diverse array of word-, sentence-, and document-level DP rewriting methods. Common to these methods is the selection of a privacy budget (i.e., the ε parameter), which governs the degree to which a text is privatized. One major limitation of previous works, stemming directly from the unique structure of language itself, is the lack of consideration of where the privacy budget should be allocated, as not all aspects of language, and therefore text, are equally sensitive or personal. In this work, we are the first to address this shortcoming, asking the question of how a given privacy budget can be intelligently and sensibly distributed amongst a target document. We construct and evaluate a toolkit of linguistics- and NLP-based methods used to allocate a privacy budget to constituent tokens in a text document. In a series of privacy and utility experiments, we empirically demonstrate that given the same privacy budget, intelligent distribution leads to higher privacy levels and more positive trade-offs than a naive distribution of epsilon. Our work highlights the intricacies of text privatization with DP, and furthermore, it calls for further work on finding more efficient ways to maximize the privatization benefits offered by DP in text rewriting.

关键词： data privacy

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Controlling security Rules Using Natural Dialogue: an application to Smart Home Care 21

Controlling Security Rules Using Natural Dialogue: an Applic...

引用

acm International Joint conference on Pervasive and Ubiquitous Computing (UbiComp) / acm International Symposium on Wearable Computers (ISWC)

作者： Goffinet, Stanley Schmitz, Donatien Zavalyshyn, Igor Legay, Axel Riviere, Etienne UCLouvain ICTEAM Ottignies Belgium

ISBN: (纸本)9781450384612

Smart home systems have revolutionized the way we interact with our living environment, but the concerns over sensor data privacy and security have become one of the major barriers to their widespread adoption. Despite a considerable research effort in designing secure access control mechanisms, the end users are still reluctant to use those either due to the complexity of the interfaces or because they do not have sufficient skills. For the elderly users the problem gets worse. Making the right security choices is increasingly more difficult for this group of users. To assist the elderly users in defining their access control policies, we design a dialogue-based system which allows to create new security rules or update existing ones in a simple and intelligible way using natural language and familiar terms.

关键词： privacy smart home elderly access control voice assistant

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security Threats from Bitcoin Wallet Smartphone applications: Vulnerabilities, Attacks, and Countermeasures 21

Security Threats from Bitcoin Wallet Smartphone Applications...

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11th acm conference on data and application security and privacy (CODASPY)

作者： Hu, Yiwen Wang, Sihan Tu, Guan-Hua Xiao, Li Xie, Tian Lei, Xinyu Li, Chi-Yu Michigan State Univ Dept Comp Sci & Engn E Lansing MI 48824 USA Natl Chiao Tung Univ Dept Comp Sci Hsinchu Taiwan

ISBN: (纸本)9781450381437

Nowadays, Bitcoin is the most popular cryptocurrency. With the proliferation of smartphones and the high-speed mobile Internet, more and more users have started accessing their Bitcoin wallets on their smartphones. Users can download and install a variety of Bitcoin wallet applications (e.g., Coinbase, Luno, Bitcoin Wallet) on their smartphones and access their Bitcoin wallets anytime and anywhere. However, it is still unknown whether these Bitcoin wallet smartphone applications are secure or if they are new attack surfaces for adversaries to attack these application users. In this work, we explored the insecurity of the 10 most popular Bitcoin wallet smartphone applications and discovered three security vulnerabilities. By exploiting them, adversaries can launch various attacks including Bitcoin deanonymization, reflection and amplification spamming, and wallet fraud attacks. To address the identified security vulnerabilities, we developed a phone-side Bitcoin security Rectifier to secure Bitcoin wallet smartphone application users. The developed rectifier does not require any modifications to current wallet applications and is compliant with Bitcoin standards.

关键词： Bitcoin wallets Blockchain security Mobile networks

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We Can Pay Less : Coordinated False data Injection Attack Against Residential Demand Response in Smart Grids 21

We Can Pay Less : Coordinated False Data Injection Attack Ag...

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11th acm conference on data and application security and privacy (CODASPY)

作者： Dayaratne, Thusitha Rudolph, Carsten Liebman, Ariel Salehi, Mahsa Monash Univ Clayton Vic Australia

ISBN: (纸本)9781450381437

Advanced metering infrastructure, along with home automation processes, is enabling more efficient and effective demand-side management opportunities for both consumers and utility companies. However, tight cyber-physical integration also enables novel attack vectors for false data injection attacks (FDIA) as home automation/home energy management systems reside outside the utilities' control perimeter. Authentic users themselves can manipulate these systems without causing significant security breaches compared to traditional FDIAs. This work depicts a novel FDIA that exploits one of the commonly utilised distributed device scheduling architectures. We evaluate the attack impact using a realistic dataset to demonstrate that adversaries gain significant benefits, independently from the actual algorithm used for optimisation, as long as they have control over a sufficient amount of demand. Compared to traditional FDIAs, reliable security mechanisms such as proper authentication, security protocols, security controls or, sealed/controlled devices cannot prevent this new type of FDIA. Thus, we propose a set of possible impact alleviation solutions to thwart this type of attack.

关键词： Demand response False data injection attack Impact alleviation Smart grid vulnerabilities

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IIoT-ARAS: IIoT/ICS Automated Risk Assessment System for Prediction and Prevention 21

IIoT-ARAS: IIoT/ICS Automated Risk Assessment System for Pre...

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11th acm conference on data and application security and privacy (CODASPY)

作者： Zahran, Bassam Hussaini, Adamu Ali-Gombe, Aisha Towson Univ Towson MD 21252 USA

ISBN: (纸本)9781450381437

As IT/OT convergence continues to evolve, the traditionally isolated ICS/OT systems are increasingly exposed to a myriad of online and offline threats. Although IIoT enhances the reachability in ICS, improved data analytics, ensuring ease of access and decision making, it unwittingly opens the ICS environment to attackers. The design of IIoT introduces multiple entry points to an isolated system, which is used to protect itself via air-gapping and risk avoidance strategies. This study explores a comprehensive mapping of threats and risks for IT/OT convergence. Additionally, we propose IIoT-ARAS - an automated risk assessment system based on OCTAVE Allegro and ISO/IEC 27030 methodologies. The design of IIoT-ARAS is aimed to be agentless, with minimum interruptions to the OT environment. Furthermore, the system performs automated regular asset inventory checks, threshold optimization, probability computation, risk evaluations, and contingency plan configuration.

关键词： Cybersecurity security IIoT ICS IT/OT Convergence

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Enhanced Threat Modeling and Attack Scenario Generation for OAuth 2.0 Implementations: data/Toolset paper 25

Enhanced Threat Modeling and Attack Scenario Generation for ...

引用

proceedings of the Fifteenth acm conference on data and application security and privacy

作者： Pieter Philippaerts Stef Verreydt Wouter Joosen KU Leuven Leuven Belgium

ISBN: (纸本)9798400714764

OAuth 2.0 is a widely adopted authorization framework enabling secure, delegated access to resources on behalf of a user. While the protocol is robust when implemented correctly, real-world deployments often exhibit vulnerabilities due to misconfigurations, incomplete mitigations, or misunderstandings of its intricacies. (Semi-)automated testing is therefore essential to identify and address these security flaws. Among available tools, OAuch offers the most comprehensive benchmark for assessing OAuth IdP implementations by identifying potential threats based on the OAuth threat model and related standards. However, OAuch has notable limitations, including an incomplete threat model, ambiguous threat classifications, and a lack of support for multi-vulnerability attack scenarios. This paper presents enhancements to OAuch that improve the tool's usability, including enriched metadata, the introduction of attack scenarios for multi-threat analyses, and a likelihood assessment to prioritize mitigation efforts.

关键词： OAuth 2.0

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TerrARA: Automated security Threat Modeling for Infrastructure as Code 25

TerrARA: Automated Security Threat Modeling for Infrastructu...

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proceedings of the Fifteenth acm conference on data and application security and privacy

作者： Anh-Duy Tran Laurens Sion Koen Yskout Wouter Joosen DistriNet KU Leuven Leuven Belgium

ISBN: (纸本)9798400714764

The emergence of DevOps is accompanied by an increased use of Infrastructure as Code (IaC) to specify and manage deployment configurations, infrastructure, and associated resources. Terraform is one such IaC solution. However, improper configurations can lead to serious security threats. This paper introduces an approach, implemented as TerrARA, that provides a systematic and structured way for automatically eliciting security threats based on Terraform configuration files. Specifically, TerrARA: (1) automates the construction of an abstract model-an enriched data Flow Diagram (DFD)-from Terraform configuration files for Amazon Web Services (AWS), and it can be extended to other resources and cloud providers via profiles; (2) encodes cloud computing threat patterns, which are utilized by the SPARTA threat modeling engine to automatically identify security threats; and (3) demonstrates its capability in accurately extracting DFDs from Terraform projects and eliciting relevant cloud computing security threats, achieving high accuracy and reasonable performance compared to existing tools and approaches like StartLeft and GPT-4o. By integrating it into CI/CD pipelines, the automated reconstruction and analysis enable continuous security assessments that systematically incorporate cloud infrastructure artifacts into the threat modeling process.

关键词： data flow diagram

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Towards Accurate Labeling of Android Apps for Reliable Malware Detection 21

Towards Accurate Labeling of Android Apps for Reliable Malwa...

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11th acm conference on data and application security and privacy (CODASPY)

作者： Salem, Aleieldin Tech Univ Munich Garching Germany

ISBN: (纸本)9781450381437

In training their newly-developed malware detection methods, researchers rely on threshold-based labeling strategies that interpret the scan reports provided by online platforms, such as VirusTotal. The dynamicity of this platform renders those labeling strategies unsustainable over prolonged periods, which leads to inaccurate labels. Using inaccurately labeled apps to train and evaluate malware detection methods significantly undermines the reliability of their results, leading to either dismissing otherwise promising detection approaches or adopting intrinsically inadequate ones. The infeasibility of generating accurate labels via manual analysis and the lack of reliable alternatives force researchers to utilize VirusTotal to label apps. In the paper, we tackle this issue in two manners. Firstly, we reveal the aspects of VirusTotal's dynamicity and how they impact threshold-based labeling strategies and provide actionable insights on how to use these labeling strategies given VirusTotal's dynamicity reliably. Secondly, we motivate the implementation of alternative platforms by (a) identifying VirusTotal limitations that such platforms should avoid, and (b) proposing an architecture of how such platforms can be constructed to mitigate VirusTotal's limitations.

关键词： android security malware detection machine learning virustotal

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TEO: Ephemeral Ownership for IoT Devices to Provide Granular data Control 22

TEO: Ephemeral Ownership for IoT Devices to Provide Granular...

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20th acm International conference on Mobile Systems, applications and Services, MobiSys 2022

作者： Zhang, Han Agarwal, Yuvraj Fredrikson, Matt Carnegie Mellon University United States

ISBN: (纸本)9781450391856

As Internet-of-Things (IoT) devices rapidly gain popularity, they raise significant privacy concerns given the breadth of sensitive data they can capture. These concerns are amplified by the fact that in many situations, IoT devices collect data about people other than their owner or administrator, and these stakeholders have no say in how that data is managed, used, or shared. To address this, we propose a new model of ownership, IoT Ephemeral Ownership (TEO). TEO allows stakeholders to quickly register with an IoT device for a limited period, and thus claim co-ownership over the sensitive data that the device generates. Device admins retain the ability to decide who may become an ephemeral owner, but no longer have access or control to the private data generated by the device. The encrypted data in TEO is accessible only by entities after seeking explicit permission from the different co-owners of that data. We verify the key security properties of our protocol underpinning TEO in the symbolic model using ProVerif. We also implement a cross-platform prototype of TEO for mobile phones and embedded devices, and integrate it into three real-world application case studies. Our evaluation shows that the latency and battery impact of TEO is typically small, adding ≤ 187 ms onto one-time operations, and introducing limited ( © 2022 Owner/Author.

关键词： Internet of things

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CODASPY 2019 - proceedings of the 9th acm conference on data and application security and privacy

CODASPY 2019 - Proceedings of the 9th ACM Conference on Data...

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9th acm conference on data and application security and privacy, CODASPY 2019

ISBN: (纸本)9781450360999

The proceedings contain 35 papers. The topics discussed include: understanding the responsiveness of mobile app developers to software library updates;acminer: extraction and analysis of authorization checks in android’s middleware;verifiable round-robin scheme for smart homes;dynamic groups and attribute-based access control for next-generation smart cars;a study of data store-based home automation;detection of threats to iot devices using scalable VPN-forwarded honeypots;deep neural networks classification over encrypted data;curie: policy-based secure data exchange;result-based detection of insider threats to relational databases;custom-made anonymization by data analysis program provided by recipient;and toward efficient spammers gathering in twitter social networks.

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