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共 557 条记录，以下是261-270 订阅

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SmartProvenance: A Distributed, Blockchain Based data Provenance System 18

SmartProvenance: A Distributed, Blockchain Based Data Proven...

引用

8th acm conference on data and application security and privacy (CODASPY)

作者： Ramachandran, Aravind Kantarcioglu, Murat Univ Texas Dallas Richardson TX 75083 USA

ISBN: (纸本)9781450356329

Blockchain technology has evolved from being an immutable ledger of transactions for cryptocurrencies to a programmable interactive environment for building distributed reliable applications. Although the blockchain technology has been used to address various challenges, to our knowledge none of the previous work focused on using Blockchain to develop a secure and immutable scientific data provenance management framework that automatically verifies the provenance records. In this work, we leverage Blockchain as a platform to facilitate trustworthy data provenance collection, verification, and management. The developed system utilizes smart contracts and open provenance model (OPM) to record immutable data trails. We show that our proposed framework can securely capture and validate provenance data that prevents any malicious modification to the captured data as long as the majority of the participants are honest.

关键词： Distributed systems Knowledge Management data Provenance Blockchain platform

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Secure, Consistent, and High-Performance Memory Snapshotting 18

Secure, Consistent, and High-Performance Memory Snapshotting

引用

8th acm conference on data and application security and privacy (CODASPY)

作者： Cox, Guilherme Yan, Zi Bhattacharjee, Abhishek Ganapathy, Vinod Rutgers State Univ Piscataway NJ 08854 USA Indian Inst Sci Bangalore Karnataka India

ISBN: (纸本)9781450356329

Many security and forensic analyses rely on the ability to fetch memory snapshots from a target machine. To date, the security community has relied on virtualization, external hardware or trusted hardware to obtain such snapshots. These techniques either sacrifice snapshot consistency or degrade the performance of applications executing atop the target. We present SnipSnap, a new snapshot acquisition system based on on-package DRAM technologies that offers snapshot consistency without excessively hurting the performance of the target's applications. We realize SnipSnap and evaluate its benefits using careful hardware emulation and software simulation, and report our results.

关键词： Cloud security forensics hardware security malware and unwanted software

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SPEED: Secure Provable Erasure for Class-1 IoT Devices 18

SPEED: Secure Provable Erasure for Class-1 IoT Devices

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8th acm conference on data and application security and privacy (CODASPY)

作者： Ammar, Mahmoud Daniels, Wilfried Crispo, Bruno Hughes, Danny Katholieke Univ Leuven Imec DistriNet Leuven Belgium Univ Trento Trento Italy

ISBN: (纸本)9781450356329

The Internet of Things (IoT) consists of embedded devices that sense and manage our environment in a growing range of applications. Large-scale IoT systems such as smart cities require significant investment in both equipment and personnel. To maximize return on investment, IoT platforms should support multiple third-party applications and adaptation of infrastructure over time. Realizing the vision of shared IoT platforms demands strong security guarantees. That is particularly challenging considering the limited capability and resource constraints of many IoT devices. In this paper, we present SPEED, an approach to secure erasure with verifiability in IoT. Secure erasure is a fundamental property when it comes to share an IoT platform with other users which guarantees the cleanness of a device's memory at the beginning of the application deployment as well as at the time of releasing the underlying IoT device. SPEED relies on two security primitives: memory isolation and distance bounding protocol. We evaluate the performance of SPEED by implementing it on a simple bare-metal IoT device belongs to Class-1. Our evaluation results show a limited overhead in terms of memory footprint, time, and energy consumption.

关键词： secure erasure iot security memory isolation distance bounding

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Hyperagents: Migrating Host Agents to the Hypervisor 18

Hyperagents: Migrating Host Agents to the Hypervisor

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8th acm conference on data and application security and privacy (CODASPY)

作者： Bushouse, Micah Reeves, Douglas North Carolina State Univ Dept Comp Sci Raleigh NC 27695 USA

ISBN: (纸本)9781450356329

Third-party software daemons called host agents are increasingly responsible for a modern host's security, automation, and monitoring tasks. Because of their location within the host, these agents are at risk of manipulation by malware and users. Additionally, in virtualized environments where multiple adjacent guests each run their own set of agents, the cumulative resources that agents consume adds up rapidly. Consolidating agents onto the hypervisor can address these problems, but places a technical burden on agent developers. This work presents a development methodology to re-engineer a host agent in to a hyperagent, an out-of-guest agent that gains unique hypervisor-based advantages while retaining its original inguest capabilities. This three-phase methodology makes integrating Virtual Machine Introspection (VMI) functionality in to existing code easier and more accessible, minimizing an agent developer's re-engineering effort. The benefits of hyperagents are illustrated by porting the GRR live forensics agent, which retains 89% of its codebase, uses 40% less memory than its in-guest counterparts, and enables a 4.9x speedup for a representative data-intensive workload. This work shows that a conventional off-the-shelf host agent can be feasibly transformed into a hyperagent and provide a powerful, efficient tool for defending virtualized systems.

关键词： Cloud security virtual machine introspection computer forensics

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pFilter: Retrofitting Legacy applications for data privacy 19

pFilter: Retrofitting Legacy Applications for Data Privacy

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proceedings of the 2019 acm SIGSAC conference on Computer and Communications security

作者： Manish Shukla Kumar Vidhani Gangadhara Sirigireddy Vijayanand Banahatti Sachin Lodha TCS Research Lab Pune India

ISBN: (纸本)9781450367479

Enterprise needs to process customer data for providing tailored services to them, however, the data often includes sensitive and personally identifiable information. This leads to a difficult situation wherein the enterprise has to balance the necessity to process the sensitive data with the requirement to safeguard its privacy. The problem is more prominent in legacy applications with almost no privacy controls in place. A well-studied technique to retrofit legacy application is to mask sensitive content before it is rendered on the screen using path based methods. In this work we show the gap in the existing state of art and describe a dynamic system which utilizes a context to perform locality based searching and masking of sensitive content.

关键词： data privacy legacy application context based masking

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Cross-App Tracking via Nearby Bluetooth Low Energy Devices 18

Cross-App Tracking via Nearby Bluetooth Low Energy Devices

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8th acm conference on data and application security and privacy (CODASPY)

作者： Korolova, Aleksandra Sharma, Vinod Univ Southern Calif Los Angeles CA 90007 USA

ISBN: (纸本)9781450356329

Today an increasing number of consumer devices such as head phones, wearables, light bulbs and even baseball bats, are Bluetooth-enabled thanks to the widespread support of the technology by phone manufacturers and mobile operating system vendors. The ability for any device to seamlessly connect and exchange information with smartphones via Bluetooth Low Energy (BLE) protocol promises unlimited room for innovation. However, it also brings about new privacy challenges. We show that the BLE protocol together with the Bluetooth permission model implemented in the Android and iOS operating systems can be used for cross-app tracking unbeknownst to the individuals. Specifically, through experiments and analyses based on real-world smartphone data we show that by listening to advertising packets broadcasted by nearby BLE-enabled devices and recording information contained in them, app developers can derive fairly unique "fingerprints" for their users, which can be used for cross-app tracking, i.e., linking pseudonymous users of different apps to each other. We demonstrate that privacy protections put in place by the Bluetooth Special Interest Group, Google, and Apple are not sufficient to prevent such fingerprinting or to make cross-app tracking difficult to execute. Our main contribution is to demonstrate the feasibility of crossapp tracking using nearby BLE and raise awareness that changes are needed in order to prevent it from becoming widespread. We also propose mitigation strategies to decrease the feasibility of tracking using nearby BLE devices while preserving the utility of the BLE technology.

关键词： privacy bluetooth tracking

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SGX Enforcement of Use-Based privacy 17

SGX Enforcement of Use-Based Privacy

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17th acm Workshop on privacy in the Electronic Society (WPES)

作者： Birrell, Eleanor Gjerdrum, Anders van Renesse, Robbert Johansen, Havard Johansen, Dag Schneider, Fred B. Pomona Coll Claremont CA 91711 USA UIT Arctic Univ Norway Tromso Norway Cornell Univ Ithaca NY USA

ISBN: (纸本)9781450359894

Use-based privacy restricts how information may be used, making it well-suited for data collection and data analysis applications in networked information systems. This work investigates the feasibility of enforcing use-based privacy in distributed systems with adversarial service providers. Three architectures that use Intel-SGX are explored: source-based monitoring, delegated monitoring, and inline monitoring. Trade-offs are explored between deployability, performance, and privacy. Source-based monitoring imposes no burden on application developers and supports legacy applications, but 35-62% latency overhead was observed for simple applications. Delegated monitoring offers the best performance against malicious adversaries, whereas inline monitoring provides performance improvements (0-14% latency overhead compared to a baseline application) in an attenuated threat model. These results provide evidence that use-based privacy might be feasible in distributed systems with active adversaries, but the appropriate architecture will depend on the type of application.

关键词： Use-based privacy privacy enforcement SGX

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Securing Wireless Neurostimulators 18

Securing Wireless Neurostimulators

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8th acm conference on data and application security and privacy (CODASPY)

作者： Marin, Eduard Singelee, Dave Yang, Bohan Volski, Vladimir Vandenbosch, Guy A. E. Nuttin, Bart Preneell, Bart Katholieke Univ Leuven Imec COSIC Leuven Belgium Katholieke Univ Leuven ESAT TELEMIC Leuven Belgium UZ Leuven Neurosurg Leuven Belgium

ISBN: (纸本)9781450356329

Implantable medical devices (IMDs) typically rely on proprietary protocols to wirelessly communicate with external device programmers. In this paper, we fully reverse engineer the proprietary protocol between a device programmer and a widely used commercial neurostimulator from one of the leading IMD manufacturers. For the reverse engineering, we follow a black-box approach and use inexpensive hardware equipment. We document the message format and the protocol state-machine, and show that the transmissions sent over the air are neither encrypted nor authenticated. Furthermore, we conduct several software radio-based attacks that could compromise the safety and privacy of patients, and investigate the feasibility of performing these attacks in real scenarios. Motivated by our findings, we propose a security architecture that allows for secure data exchange between the device programmer and the neurostimulator. It relies on using a patient's physiological signal for generating a symmetric key in the neurostimulator, and transporting this key from the neurostimulator to the device programmer through a secret out-of-band (OOB) channel. Our solution allows the device programmer and the neurostimulator to agree on a symmetric session key without these devices needing to share any prior secrets;offers an effective and practical balance between security and permissive access in emergencies;requires only minor hardware changes in the devices;adds minimal computation and communication overhead;and provides forward and backward security. Finally, we implement a proof-of-concept of our solution.

关键词： Proprietary wireless communication protocol black-box reverse engineering low-cost randomness source security architecture

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GUILeak: Tracing privacy Policy Claims on User Input data for Android applications 18

GUILeak: Tracing Privacy Policy Claims on User Input Data fo...

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40th acm/IEEE International conference on Software Engineering (ICSE)

作者： Wang, Xiaoyin Qin, Xue Hosseini, Mitra Bokaei Slavin, Rocky Breaux, Travis D. Niu, Jianwei Univ Texas San Antonio San Antonio TX 78249 USA Carnegie Mellon Univ Pittsburgh PA 15213 USA

ISBN: (纸本)9781450356381

The Android mobile platform supports billions of devices across more than 190 countries around the world. This popularity coupled with user data collection by Android apps has made privacy protection a well-known challenge in the Android ecosystem. In practice, app producers provide privacy policies disclosing what information is collected and processed by the app. However, it is difficult to trace such claims to the corresponding app code to verify whether the implementation is consistent with the policy. Existing approaches for privacy policy alignment focus on information directly accessed through the Android platform (e.g., location and device ID), but are unable to handle user input, a major source of private information. In this paper, we propose a novel approach that automatically detects privacy leaks of user-entered data for a given Android app and determines whether such leakage may violate the app's privacy policy claims. For evaluation, we applied our approach to 120 popular apps from three privacy-relevant app categories: finance, health, and dating. The results show that our approach was able to detect 21 strong violations and 18 weak violations from the studied apps.

关键词： Mobile privacy policy Android application User input

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Remote Attestation for Low-End Prover Devices with Post-Quantum Capabilities 18

Remote Attestation for Low-End Prover Devices with Post-Quan...

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8th acm conference on data and application security and privacy (CODASPY)

作者： Liu, Xiruo Misoczki, Rafael Sastry, Manoj R. Intel Corp Intel Labs Hillsboro OR 97124 USA

ISBN: (纸本)9781450356329

Remote attestation is a well-established interactive technique to establish trust in the realm of connected devices. It allows a Prover device to attest its platform integrity to a Verifier device. Existing remote attestation protocols rely on classical asymmetric cryptography, which are too heavy for low-end Prover devices, and vulnerable to quantum attacks (a serious concern due to the long lifespan of IoT devices). Hash-Based Signatures (HBS) offer attractive performance and have capabilities to defeat quantum attacks. This paper presents several contributions in this context. First, we present an efficient remote attestation protocol that requires the Prover to perform only one-time HBS operations, which are very lightweight. Our protocol also proposes robust embedded techniques to refresh one-time keys that allow multiple attestations. Second, we present a simpler construction based on multi-time HBS scheme which does not depend on a trusted-third-party. Third, to demonstrate the feasibility of our protocols, we developed prototypes based on state-of-the-art HBS schemes (XMSS and WOTS+) for highly constrained platforms (Arduino 101) in both classical and post-quantum security settings. Finally, we present a comprehensive comparison between these strategies, including guidance on suitable use cases for each one of them. To summarize, our work demonstrates the feasibility of modern HBS constructions for remote attestation of highly-constrained devices.

关键词： Remote Attestation Hash-Based Signatures Post-Quantum Cryptography Internet of Things security

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