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检索条件"任意字段=Proceedings of the 5th ACM Conference on Data and Application Security and Privacy"

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FridgeLock: Preventing data theft on Suspended Linux with Usable Memory Encryption 20

FridgeLock: Preventing Data Theft on Suspended Linux with Us...

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10th acm conference on data and application security and privacy (CODASPY)

作者： Franzen, Fabian Andreas, Manuel Huber, Manuel Tech Univ Munich Munich Germany Fraunhofer AISEC Garching Germany

ISBN: (纸本)9781450371070

To secure mobile devices, such as laptops and smartphones, against unauthorized physical data access, employing Full Disk Encryption (FDE) is a popular defense. this technique is effective if the device is always shut down when unattended. However, devices are often suspended instead of switched off. this leaves confidential data such as the FDE key, passphrases and user data in RAM which may be read out using cold boot, JTAG or DMA attacks. these attacks can be mitigated by encrypting the main memory during suspend. While this approach seems promising, it is not implemented on Windows or Linux. We present FridgeLock to add memory encryption on suspend to Linux. Our implementation as a Linux Kernel Module (LKM) does not require an admin to recompile the kernel. Using Dynamic Kernel Module Support (DKMS) allows for easy and fast deployment on existing Linux systems, where the distribution provides a prepackaged kernel and kernel updates. We tested our module on a range of 4.19 to 5.3 kernels and experienced a low performance impact, sustaining the system's usability. We hope that our tool leads to a more detailed evaluation of memory encryption in real world usage scenarios.

关键词： suspend time memory encryption operating systems security ram encryption data confidentiality

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Big data: An opportunity and Challenge for M commerce 5

Big Data: An opportunity and Challenge for M commerce

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5th International conference on IoT in Social, Mobile, Analytics and Cloud (I-SMAC)

作者： Galhotra, Bhavna GGSIP Univ Jagan Inst Management Studies Informat Technol Dept Sect 5 Delhi India

ISBN: (纸本)9781665426428

With an evolution of 5G technologies there is a drastic change in the industries and usage of internet. After the pandemic has hit the world there is an emergence of data with the usage of online transactions, online studies, exchange of good and services over the internet. Since there is an increase in the use of the internet and online applications more and more of the data is being generated and used. there is a paradigm shift in the Mobile commerce, with the use of mobile commerce there are various opportunities and challenges connected with it. M Commerce is exchange of goods and services over the internet using PDA's. the advantage of M commerce is it can be done anytime and anywhere. With this there is a tremendous growth in the use of smart phones and most of the E commerce organizations are now using the applications based business models for buying and selling goods and services. the current study investigates how Big data is used and considered to be the biggest challenge for the M commerce business processing's. the data is ballooning in the size with the usage of the applications, companies are utilizing the data for satisfying the customers' requirements and benefitting the consumers with an increase in the profit for the organization as well. Along with this big data companies are also using the business technologies, artificial Intelligence and Machine Learning to advertise and attract the customers' demands. In this paper author has discussed about the needs and challenges of the big data in Mobile commerce with smooth functioning of with the security concerns. Also the author has suggested that the block chain technology can also play a vital role in the use of the data for better functioning. It can massively change the functionality of the M commerce application performance as well.

关键词： Big data. M commerce Communication Technologies Artificial Intelligence and Machine Learning

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A survey of privacy leakage and security vulnerabilities in the internet of things 5

A survey of privacy leakage and security vulnerabilities in ...

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5th International conference on Communication and Electronics Systems, ICCES 2020

作者： Tyagi, Amit Kumar Goyal, Deepti School of Computer Science and Engineering Vellore Institute of Technology Chennai Campus Chennai Tamilnadu600127 India Department of Computer Science and Engineering Lingaya's Vidyapeeth Faridabad Haryana121002 India

ISBN: (纸本)9781728153711

In this world, where everything around use is linked with technology, be it smart homes, smart cities, smart cars, etc. Internet of things (IoT) or Internet Connected things (ICT) are connected todays everywhere, with everywhere which is used to build a smart environment (with physical world). In fact, these internet linked gadgets have made our lives extremely easy, secure, and quick. But, using such devices in our daily life, people are very much concern about "their personal information". So a question raised here: "Is it (personal information) safe with these (such) devices"? When these devices are connected together, they build an ecosystem together for human being/for various applications. A lot of data is being captured and transformed into valuable forms, which is used in future for increase productivity by forms/ organisation (in many application areas), ranging from automated home appliances, smart grids and high-resolution assets, to product management. this captured and collected data creates several issues, so it requires new/ useful strategies of enhancing the present status of IoT by incorporating (or overcoming) security and privacy into its current design, structure and implementation. Hence, this article explains such issues (in IoT) like privacy breaches, security vulnerability etc., in clear manner. © 2020 IEEE.

关键词： Internet of things

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2nd Workshop on Coordination of Decentralized Finance, CoDecFin 2021, 1st Workshop on Decentralized Finance, DeFi 2021, 6th Workshop on Advances in Secure Electronic Voting, VOTING 2021, and 5th Workshop on Trusted Smart Contracts, WTSC 2021, held in conjunction with the 25th International conference on Financial Cryptography and data security, FC 2021

2nd Workshop on Coordination of Decentralized Finance, CoDec...

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2nd Workshop on Coordination of Decentralized Finance, CoDecFin 2021, 1st Workshop on Decentralized Finance, DeFi 2021, 6th Workshop on Advances in Secure Electronic Voting, VOTING 2021, and 5th Workshop on Trusted Smart Contracts, WTSC 2021, held in conjunction with the 25th International conference on Financial Cryptography and data security, FC 2021

ISBN: (纸本)9783662639573

the proceedings contain 43 papers. the special focus in this conference is on Coordination of Decentralized Finance. the topics include: On Stablecoin Price Processes and Arbitrage;red-Black Coins: Dai Without Liquidations;formal Analysis of Composable DeFi Protocols;how to Exploit a DeFi Project;deFi as an Information Aggregator;a Game-theoretic Analysis of Cross-ledger Swaps with Packetized Payments;wendy Grows Up: More Order Fairness;measuring Illicit Activity in DeFi: the Case of Ethereum;global Order Routing on Exchange Networks;Regulatory Considerations on Centralized Aspects of DeFi Managed by DAOs;towards a theory of Decentralized Finance;auditing Hamiltonian Elections;cast-as-Intended: A Formal Definition and Case Studies;mobile Voting – Still Too Risky?;new Standards for E-Voting Systems: Reflections on Source Code Examinations;post-quantum Online Voting Scheme;short Paper: Ballot Secrecy for Liquid Democracy;shorter Lattice-Based Zero-Knowledge Proofs for the Correctness of a Shuffle;on-Chain Smart Contract Verification over Tendermint;publicly Verifiable and Secrecy Preserving Periodic Auctions;collaborative Deanonymization;ethVer: Formal Verification of Randomized Ethereum Smart Contracts;absentia: Secure Multiparty Computation on Ethereum;empirical Analysis of On-chain Voting with Smart Contracts;mirroring Public Key Infrastructures to Blockchains for On-Chain Authentication;reactive Key-Loss Protection in Blockchains;merkle Trees Optimized for Stateless Clients in Bitcoin;soft Power: Upgrading Chain Macroeconomic Policy through Soft Forks;privacy-Preserving Resource Sharing Using Permissioned Blockchains: (the Case of Smart Neighbourhood);soK: Algorithmic Incentive Manipulation Attacks on Permissionless PoW Cryptocurrencies;pay to Win: Cheap, Cross-Chain Bribing Attacks on PoW Cryptocurrencies;soK: Lending Pools in Decentralized Finance.

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PREDICT: Efficient Private Disease Susceptibility Testing in Direct-to-Consumer Model 20

PREDICT: Efficient Private Disease Susceptibility Testing in...

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10th acm conference on data and application security and privacy (CODASPY)

作者： Ugwuoke, Chibuike Erkin, Zekeriya Reinders, Marcel Lagendijk, Reginald L. Delft Univ Technol Delft Netherlands

ISBN: (纸本)9781450371070

Genome sequencing has rapidly advanced in the last decade, making it easier for anyone to obtain digital genomes at low costs from companies such as Helix, MyHeritage, and 23andMe. Companies now offer their services in a direct-to-consumer (DTC) model without the intervention of a medical institution. thereby, providing people with direct services for paternity testing, ancestry testing and disease susceptibility testing (DST) to infer diseases' predisposition. Genome analyses are partly motivated by curiosity and people often want to partake without fear of privacy invasion. Existing privacy protection solutions for DST adopt cryptographic techniques to protect the genome of a patient from the party responsible for computing the analysis. Said techniques include homomorphic encryption, which can be computationally expensive and could take minutes for only a few single-nucleotide polymorphisms (SNPs). A predominant approach is a solution that computes DST over encrypted data, but the design depends on a medical unit and exposes test results of patients to the medical unit, making the design uncomfortable for privacy-aware individuals. Hence it is pertinent to have an efficient privacy-preserving DST solution with a DTC service. We propose a novel DTC model that protects the privacy of SNPs and prevents leakage of test results to any other party save for the genome owner. Conversely, we protect the privacy of the algorithms or trade secrets used by the genome analyzing companies. Our work utilizes a secure obfuscation technique in computing DST, eliminating expensive computations over encrypted data. Our approach significantly outperforms existing state-of-the-art solutions in runtime and scales linearly for equivalent levels of security. As an example, computing DST for 10,000 SNPs requires approximately 96 milliseconds on commodity hardware. With this efficient and privacy-preserving solution which is also simulation-based secure, we open possibilities for performi

关键词： SNP Genome privacy-Preserving Obfuscation Direct-to-customer Disease Susceptibility Testing

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the Good, the Bad and the (Not So) Ugly of Out-Of-Band Authentication with eID Cards and Push Notifications 20

The Good, the Bad and the (Not So) Ugly of Out-Of-Band Authe...

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10th acm conference on data and application security and privacy (CODASPY)

作者： Pernpruner, Marco Carbone, Roberto Ranise, Silvio Sciarretta, Giada Fdn Bruno Kessler Secur & Trust Res Unit Trento Italy

ISBN: (纸本)9781450371070

Everyday life is permeated by new technologies allowing people to perform almost any kind of operation from their smart devices. Although this is amazing from a convenience perspective, it may result in several security issues concerning the need for authenticating users in a proper and secure way. Electronic identity cards (also called eID cards) play a very important role in this regard, due to the high level of assurance they provide in identification and authentication processes. However, authentication solutions relying on them are still uncommon and suffer from many usability limitations. In this paper, we thus present the design and implementation of a novel passwordless, multi-factor authentication protocol based on eID cards. To reduce known usability issues while keeping a high level of security, our protocol leverages push notifications and mobile devices equipped with NFC, which can be used to interact with eID cards. In addition, we evaluate the security of the protocol through a formal security analysis and a risk analysis, whose results emphasize the acceptable level of security.

关键词： eID cards Formal analysis Multi-factor authentication Passwordless Push notifications Risk analysis security protocols

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TrafficSliver: Fighting Website Fingerprinting Attacks with Traffic Splitting 20

TrafficSliver: Fighting Website Fingerprinting Attacks with ...

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acm SIGSAC conference on Computer and Communications security (acm CCS)

作者： De la Cadena, Wladimir Mitseva, Asya Hiller, Jens Pennekamp, Jan Reuter, Sebastian Filter, Julian Engel, thomas Wehrle, Klaus Panchenko, Andriy Univ Luxembourg Esch Sur Alzette Luxembourg Brandenburg Tech Univ Cottbus Cottbus Germany Rhein Westfal TH Aachen Aachen Germany

ISBN: (纸本)9781450370899

Website fingerprinting (WFP) aims to infer information about the content of encrypted and anonymized connections by observing patterns of data flows based on the size and direction of packets. By collecting traffic traces at a malicious Tor entry node - one of the weakest adversaries in the attacker model of Tor - a passive eavesdropper can leverage the captured meta-data to reveal the websites visited by a Tor user. As recently shown, WFP is significantly more effective and realistic than assumed. Concurrently, former WFP defenses are either infeasible for deployment in real-world settings or defend against specific WFP attacks only. To limit the exposure of Tor users to WFP, we propose novel lightweight WFP defenses, TrafficSliver, which successfully counter today's WFP classifiers with reasonable bandwidth and latency overheads and, thus, make them attractive candidates for adoption in Tor. through user-controlled splitting of traffic over multiple Tor entry nodes, TrafficSliver limits the data a single entry node can observe and distorts repeatable traffic patterns exploited by WFP attacks. We first propose a network-layer defense, in which we apply the concept of multipathing entirely within the Tor network. We show that our network-layer defense reduces the accuracy from more than 98% to less than 16% for all state-of-the-art WFP attacks without adding any artificial delays or dummy traffic. We further suggest an elegant client-side application-layer defense, which is independent of the underlying anonymization network. By sending single HTTP requests for different web objects over distinct Tor entry nodes, our application-layer defense reduces the detection rate of WFP classifiers by almost 50 percentage points. Although it offers lower protection than our network-layer defense, it provides a security boost at the cost of a very low implementation overhead and is fully compatible with today's Tor network.

关键词： Traffic Analysis Website Fingerprinting privacy Anonymous Communication Onion Routing Web privacy

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SeCaS: Secure Capability Sharing Framework for IoT Devices in a Structured P2P Network 20

SeCaS: Secure Capability Sharing Framework for IoT Devices i...

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10th acm conference on data and application security and privacy (CODASPY)

作者： Aktypi, Angeliki Kalkan, Kubra Rasmussen, Kasper B. Univ Oxford Dept Comp Sci Oxford England Ozyegin Univ Dept Comp Sci Istanbul Turkiye

ISBN: (纸本)9781450371070

the emergence of the internet of things (IoT) has resulted in the possession of a continuously increasing number of highly heterogeneous connected devices by the same owner. To make full use of the potential of a personal IoT network, there must be secure and effective cooperation between them. While application platforms (e.g., Samsung Smartthings) and interoperable protocols (e.g., MQTT) exist already, the reliance on a central hub to coordinate communication introduces a single-point of failure, provokes bottleneck problems and raises privacy concerns. In this paper we propose SeCaS, a Secure Capability Sharing framework, built on top of a peer-to-peer (P2P) architecture. SeCaS addresses the problems of fault tolerance, scalability and security in resource discovery and sharing for IoT infrastructures using a structured P2P network, in order to take advantage of the self-organised and decentralised communication it provides. SeCaS brings three main contributions: (i) a capability representation that allows each device to specify what services they offer, and can be used as a common language to search for, and exchange, capabilities, resulting in flexible service discovery that can leverage the properties on a distributed hash table (DHT);(ii) a set of four protocols that provides identification of the different devices that exist in the network and authenticity of the messages that are exchanged among them;and (iii) a thorough security and complexity analysis of the proposed scheme that shows SeCaS to be both secure and scalable.

关键词： IoT DHT Resource Sharing Scalability Fault-Tolerance privacy

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Discussion and Practice of Computer Network Information and Network security Protection Strategy 5

Discussion and Practice of Computer Network Information and ...

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5th International conference on Mechanical, Control and Computer Engineering (ICMCCE)

作者： Liu, Li Shandong Xiehe Univ Jinan 250109 Shandong Peoples R China

ISBN: (纸本)9781665423144

With the development of science and technology, especially the application of big data technology, the role of computer networks has become more and more significant. Computer network has a profound impact on people's life and work, and has even become a part of life and work. However, computer network technology has also exposed some problems while providing convenience to people's lives. For example, the resulting information security issues pose a threat to people's personal privacy, corporate security, national security, etc., thereby affecting the sustainable development of computer network technology. Based on this, we must strengthen the research on computer network security. In particular, it is necessary to strengthen the research on the phenomenon of computer network information leakage and its causes, and strengthen the computer network security management. At the same time, we should also take necessary preventive measures from both technical and management aspects to ensure the safety of computer network information and reduce computer network threats. In view of this, this article will analyze and explore the current factors affecting computer network security on the basis of related concepts of computer network information security. the author analyzes how we should strengthen defenses from the perspective of technology and management to ensure the security of network information.

关键词： Computer Network Information Network security security Defense

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Efficient Mobile User Authentication Service with privacy Preservation and User Untraceability 5

Efficient Mobile User Authentication Service with Privacy Pr...

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5th International conference on Cloud Computing and Artificial Intelligence - Technologies and applications (CloudTech)

作者： Braeken, An Touhafi, Abdellah Vrije Univ Brussel VUB INDI Brussels Belgium

ISBN: (纸本)9781728161754

security questions and answers for authentication are a common approach to enable the user to reset forgotten passwords. Moreover, they are also sometimes used as alternative for the classical username-password system, which fails in offering a good balance between user friendliness and security as long and complex passwords are required. However, in order to guarantee the privacy of the user as imposed by the new General data Protection Regulation (GDPR), it should be impossible to derive the answer of the user by any other entity, including the server provider or the server managing the authentication. In this paper, we present an efficient mobile based security mechanism to realise this goal. the proposed scheme can be applied on top of any type of question-answer based authentication system. In addition, our solution also offers anonymity and untraceability of the user, such that no activity patterns can be drawn by simply eavesdropping on the communication channel to the service provider or the authentication server. We show that our proposed mechanism not only offers more security features compared to related work, but it is also significantly faster, in particular at the side of the user.

关键词： Authentication Anonymity Physical Unclonable Function

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