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检索条件"任意字段=3rd ACM Conference on Data and Application Security and Privacy, CODASPY 2013"

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Effect of grammar on security of long passwords 13

Effect of grammar on security of long passwords

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3rd acm conference on data and application security and privacy, codaspy 2013

作者： Rao, Ashwini Jha, Birendra Kini, Gananand Carnegie Mellon University United States Massachusetts Institute of Technology United States

ISBN: (纸本)9781450318907

Use of long sentence-like or phrase-like passwords such as "abiggerbetterpassword"and"thecommunistfairy"is increasing. In this paper, we study the role of grammatical structures underlying such passwords in diminishing the security of passwords. We show that the results of the study have direct bearing on the design of secure password policies, and on password crackers used for enforcing password security. Using an analytical model based on Parts-of-Speech tagging we show that the decrease in search space due to the presence of grammatical structures can be more than 50%. A significant result of our work is that the strength of long passwords does not increase uniformly with length. We show that using a better dictionary e.g. Google Web Corpus, we can crack more long passwords than previously shown (20.5% vs. 6%). We develop a proof-of-concept grammar-aware cracking algorithm to improve the cracking efficiency of long passwords. In a performance evaluation on a long password dataset, 10% of the total dataset was exclusively cracked by our algorithm and not by state-of-the-art password crackers. Categories and Subject Descriptors: D.4.6 [Operating Systems]: security and Protection-Authentication General Terms: security, Algorithms, Performance. Copyright 2013 acm.

关键词： Cracks

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Sweetening android lemon markets: Measuring and combating malware in application marketplaces 13

Sweetening android lemon markets: Measuring and combating ma...

引用

3rd acm conference on data and application security and privacy, codaspy 2013

作者： Vidas, Timothy Christin, Nicolas Carnegie Mellon University Pittsburgh PA United States

ISBN: (纸本)9781450318907

application marketplaces are the main software distribution mechanism for modern mobile devices but are also emerging as a viable alternative to brick-and-mortar stores for personal computers. While most application marketplaces require applications to be cryptographically signed by their developers, in Android marketplaces, self-signed certificates are common, thereby offering very limited authentication properties. As a result, there have been reports of malware being distributed through application "repackaging." We provide a quantitative assessment of this phenomenon by collecting 41,057 applications from 194 alternative Android application markets in October 2011, in addition to a sample of 35,423 applications from the official Android market, Google Play. We observe that certain alternative markets almost exclusively distribute repackaged applications containing malware. To remedy this situation we propose a simple verification protocol, and discuss a proofof- concept implementation, AppIntegrity. AppIntegrity strengthens the authentication properties offered in application marketplaces, thereby making it more difficult for miscreants to repackage apps, while presenting very little computational or communication overhead, and being deployable without requiring significant changes to the Android platform. Copyright 2013 acm.

关键词： Android (operating system)

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FENCE: Continuous Access control enforcement in dynamic data stream environments 13

FENCE: Continuous Access control enforcement in dynamic data...

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3rd acm conference on data and application security and privacy, codaspy 2013

作者： Nehme, Rimma V. Lim, Hyo-Sang Bertino, Elisa Microsoft Jim Gray Systems Lab United States Computer and Telecommunications Engineering Division Yonsei University Korea Republic of Department of Computer Science and Cyber Center Purdue University United States

ISBN: (纸本)9781450318907

In this paper, we address the problem of continuous access control enforcement in dynamic data stream environments, where both data and query security restrictions may potentially change in realtime. We present FENCE framework that effectively addresses this problem. The distinguishing characteristics of FENCE include: (1) the stream-centric approach to security, (2) the symmetric model for security settings of both continuous queries and streaming data, and (3) two alternative security-aware query processing approaches that can optimize query execution based on regular and securityrelated selectivities. In FENCE, both data and query security restrictions are modeled symmetrically in the form of security metadata, called "security punctuations" embedded inside data streams. We distinguish between two types of security punctuations, namely, the data security punctuations (or short, dsps) which represent the access control policies of the streaming data, and the query security punctuations (or short, qsps) which describe the access authorizations of the continuous queries. We also present our encoding method to support XacmL(eXtensible Access ControlMarkup Language) standard. We have implemented FENCE in a prototype DSMS and present our performance evaluation. The results of our experimental study show that FENCE's approach has low overhead and can give great performance benefits compared to the alternative security solutions for streaming environments. Copyright 2013 acm.

关键词： Access control

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Multi-user dynamic proofs of data possession using trusted hardware 13

Multi-user dynamic proofs of data possession using trusted h...

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3rd acm conference on data and application security and privacy, codaspy 2013

作者： Tate, Stephen R. Vishwanathan, Roopa Everhart, Lance Dept. of Computer Science UNC Greensboro United States

ISBN: (纸本)9781450318907

In storage outsourcing services, clients store their data on a potentially untrusted server, which has more computational power and storage capacity than the individual clients. In this model, security properties such as integrity, authenticity, and freshness of stored data ought to be provided, while minimizing computational costs at the client, and communication costs between the client and the server. Using trusted computing technology on the server's side, we propose practical constructions in the provable data possession model that provide integrity and freshness in a dynamic, multi-user setting, where groups of users can update their shared files on the remote, untrusted server. Unlike previous solutions based on a single-user, single-device model, we consider a multi-user, multi-device model. Using trusted hardware on the server helps us to eliminate some of the previously known challenges with this model, such as forking and rollback attacks by the server. We logically separate bulk storage and data authentication issues to different untrusted remote services, which can be implemented either on the same or different physical servers. With only minor modifications to existing services, the bulk storage component can be provided by large-scale storage providers such as Google, CloudDrive, DropBox, and a smaller specialized server equipped with a trusted hardware chip can be used for providing data authentication. Our constructions eliminate client-side storage costs (clients do not need to maintain persistent state), and are suitable for situations in which multiple clients work collaboratively on remotely stored, outsourced data. Copyright 2013 acm.

关键词： Cloud storage

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Insured access: An approach to ad-hoc information sharing for virtual organizations 13

Insured access: An approach to ad-hoc information sharing fo...

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3rd acm conference on data and application security and privacy, codaspy 2013

作者： Tanaka, Naoki Winslett, Marianne Lee, Adam J. Yau, David K.Y. Bao, Feng Department of Computer Science University of Illinois Urbana-Champaign United States Cryptography and Security Department Institute for Infocomm Research United States Advanced Digital Sciences Center United States Department of Computer Science University of Pittsburgh United States Department of Computer Science Purdue University United States

ISBN: (纸本)9781450318907

A virtual organization (VO) is a group of organizations that have banded together to achieve a common goal. Often a VO could function more effectively if its members were willing to share certain information. However, a typical VO member will not want to share its own information because the member will not benefit directly from the information's reuse, yet will be blamed if the reuse turns out badly. In this paper, we present insured access, the first economically sustainable system for encouraging appropriate information sharing in VOs. Before accessing information, a VO member must purchase a liability policy from the insurance arm of the VO. Insured access uses actuarial principles to set up and run the VO's insurance arm, and provides the following benefits: VO members who share their information are compensated if the information is misused, and can expect a positive benefit from sharing;members who use information well are rewarded and those who misuse it are penalized appropriately;and the level of risk-taking in the system is capped at a certain level. We demonstrate the sustainability of insured sharing through simulations of a map-sharing scenario. Copyright 2013 acm.

关键词： Authorization

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privacy preserving similarity detection for data analysis

Privacy preserving similarity detection for data analysis

引用

3rd IEEE International conference on Cloud and Green Computing (CGC)

作者： Leontiadis, Iraklis Oenen, Melek Molva, Refik Chorley, M. J. Colombo, G. B. EURECOM Networking & Secur Dept Sophia Antipolis France Cardiff Univ Sch Comp Sci & Informat Cardiff South Glam Wales

ISBN: (纸本)9780769551142

Current applications tend to use personal sensitive information to achieve better quality with respect to their services. Since the third parties are not trusted the data must be protected such that individual data privacy is not compromised but at the same time operations on it would be compatible. A wide range of data analysis operations entails a similarity detection algorithm between user data. For instance clustering on big data groups together objects based on the heuristic that similar objects are likely to be put under the same cluster. Similarity decisions are important for numerous applications such as: online social networks, recommendations systems and behavioral advertisement. In this paper we propose a mechanism that protects user privacy and preserves data similarity results although encrypted. We analyze the security of the scheme and we further demonstrate its correctness and feasibility through a real life experiment where "personality traits" by users are collected for a 4square application.

关键词： Information security privacy data analysis similarity detection

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Investigating the application of One Instruction Set Computing for Encrypted data Computation

Investigating the Application of One Instruction Set Computi...

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3rd International conference on security, privacy, and Applied Cryptography Engineering (SPACE)

作者： Tsoutsos, Nektarios Georgios Maniatakos, Michail NYU Polytech Sch Engn 550 1St Ave New York NY 10012 USA New York Univ Abu Dhabi Elect & Comp Engn Abu Dhabi U Arab Emirates

ISBN: (纸本)9783642412240;9783642412233

The cloud computing revolution has emphasized the need to execute programs in private using third party infrastructure. In this work, we investigate the application of One Instruction Set Computing (OISC) for processing encrypted data. This novel architecture combines the simplicity and high throughput of OISC with the security of well-known homomorphic encryption schemes, allowing execution of encrypted machine code and secure computation over encrypted data. In the presented case study, we choose addleq as the OISC instruction and Paillier's scheme for encryption, and we extensively discuss the architecture and security implications of encrypting the instructions and memory accesses. Preliminary results in our implemented hardware-cognizant software simulator indicate an average execution overhead of 26 times for 1024-bit security parameter, compared to unencrypted execution of the same OISC programs.

关键词： Encrypted processor homomorphic encryption Paillier cloud computing

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Automated determination of security services to ensure personal data protection in the Internet of Things applications

Automated determination of security services to ensure perso...

引用

2013 3rd International conference on Innovative Computing Technology, INTECH 2013

作者： Sanchez Alcon, J.A. Lopez, Lourdes Martinez, Jose-Fernan Castillejo, Pedro Edificio la Arboleda Ctra. Valencia Km 7 28031 Madrid Spain

ISBN: (纸本)9781479900473

This paper describes a method aimed at automatically determining security services to be implemented in products, services and devices involved on the Internet of Things scenarios. It is important to consider the specific context, legislative diversity and nature of the information since its main objective is to have correct and fair data processing that avoids users in perceiving any danger to their privacy. This paper gives a brief overview based on several types of security threat scenarios. It tries to introduce 'Utility Matrix' concept that connects involved users, their security needs, and legal imperatives all together. Based on 'Utility Matrix', an expert system is proposed in order to automate security service decisions and solution for personal data protection on the area of Internet of Things. Different approaches are presented, and several applied use cases are given for AWARE product, such as application. This automated system is in the development phase. Nevertheless, this project has to connect areas of the Industry to the judicial and technology, taking into account that users are in the middle of the scenario. As a result of this project, a certificate of personal data protection to users and companies could be obtained. It could be a tool to simulate and evaluate the impact of new services, new laws, and new needs in technology and research. © 2013 IEEE.

关键词： Internet of things

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security, privacy, and Applied Cryptography Engineering - 3rd International conference, SPACE 2013, Proceedings

Security, Privacy, and Applied Cryptography Engineering - 3r...

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3rd International conference on security, privacy, and Applied Cryptography Engineering, SPACE 2013

ISBN: (纸本)9783642412233

The proceedings contain 12 papers. The topics discussed include: three design dimensions of secure embedded systems;investigating the application of one instruction set computing for encrypted data computation;alphanumeric shellcode generator for ARM architecture;SIMD-based implementations of sieving in integer-factoring algorithms;strong security and privacy of RFID system for Internet of things infrastructure;correlation-immune Boolean functions for leakage squeezing and rotating S-box masking against side channel attacks;a time series approach for profiling attack;algorithms for switching between Boolean and arithmetic masking of second order;identity-based identification schemes from ID-KEMs;anonymous identity-based identification scheme in ad-hoc groups without pairings;dynamic attribute based group signature with attribute anonymity and tracing in the standard model;and from selective-ID to full-ID lBS without random Oracles.

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The novel application model of internet of things based on IPv6 technology

The novel application model of internet of things based on I...

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2013 3rd International conference on Advanced Measurement and Test, AMT 2013

作者： Kuang, Guo Fang Kuang, Chun Lin College of Information Technology Luoyang Normal University Luoyang 471022 China

ISBN: (纸本)9783037857168

IPv6 not only solves the problem of IP address deficient, also simplified the protocol header, and the success of the introduction of two new extension header AH and ESP. The Internet of things perceived terminal data format varied, unified management difficult operation, new business difficulty landing. The research of security Internet of things will mainly focus on the open web application security system, individual privacy protection mode of networking, security features, Internet safety laws formulation. The paper presents the novel application model of Internet of things based on IPv6 technology. Experimental results show that the proposed method has high efficiency. © (2013) Trans Tech Publications, Switzerland.

关键词： Internet of things

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