The back-end databases of web-based applications are a major data security concern to enterprises. The problem becomes more critical with the proliferation of enterprise hosted web applications in the cloud. While prior work has concentrated on malicious attacks that try to break into the database using vulnerabilities of web applications, little work has focused on the threat of data harvesting through web form interfaces, in which large collections of the underlying data can be harvested and sensitive information can be learnt by iteratively submitting legitimate queries and analyzing the returned results for designing new queries. To defend against data harvesting without compromising usability, we consider a detection approach. We summarize the characteristics of data harvesting, and propose the notions of query correlation and result coverage for data harvesting detection. We design a detection system called HengHa, in which Heng examines the correlation among queries in a session, and Ha evaluates the data coverage of the results of queries in the same session. The experimental results verify the effectiveness and efficiency of HengHa for data harvesting detection.
{"title":"HengHa: data harvesting detection on hidden databases","authors":"Shiyuan Wang, D. Agrawal, A. E. Abbadi","doi":"10.1145/1866835.1866847","DOIUrl":"https://doi.org/10.1145/1866835.1866847","url":null,"abstract":"The back-end databases of web-based applications are a major data security concern to enterprises. The problem becomes more critical with the proliferation of enterprise hosted web applications in the cloud. While prior work has concentrated on malicious attacks that try to break into the database using vulnerabilities of web applications, little work has focused on the threat of data harvesting through web form interfaces, in which large collections of the underlying data can be harvested and sensitive information can be learnt by iteratively submitting legitimate queries and analyzing the returned results for designing new queries. To defend against data harvesting without compromising usability, we consider a detection approach. We summarize the characteristics of data harvesting, and propose the notions of query correlation and result coverage for data harvesting detection. We design a detection system called HengHa, in which Heng examines the correlation among queries in a session, and Ha evaluates the data coverage of the results of queries in the same session. The experimental results verify the effectiveness and efficiency of HengHa for data harvesting detection.","PeriodicalId":300613,"journal":{"name":"Cloud Computing Security Workshop","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131611738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Clouds and Grids offer significant challenges to providing secure infrastructure software. As part of a our effort to secure such middleware, we present First Principles Vulnerability Assessment (FPVA), a new analyst-centric (manual) technique that aims to focus the analyst's attention on the parts of the software system and its resources that are most likely to contain vulnerabilities that would provide access to high-value assets. FPVA finds new threats to a system and is not dependent on a list of known threats. Manual assessment is labor-intensive, making the use of automated assessment tools quite attractive. We compared the results of FPVA to those of the top commercial tools, providing the first significant evaluation of these tools against a real-world known collection of serious vulnerabilities. While these tools can find common problems in a program's source code, they miss a significant number of serious vulnerabilities found by FPVA. We are now using the results of this comparison study to guide our future research into improving automated software assessment.
{"title":"First principles vulnerability assessment","authors":"J. Kupsch, B. Miller, E. Heymann, Eduardo César","doi":"10.1145/1866835.1866852","DOIUrl":"https://doi.org/10.1145/1866835.1866852","url":null,"abstract":"Clouds and Grids offer significant challenges to providing secure infrastructure software. As part of a our effort to secure such middleware, we present First Principles Vulnerability Assessment (FPVA), a new analyst-centric (manual) technique that aims to focus the analyst's attention on the parts of the software system and its resources that are most likely to contain vulnerabilities that would provide access to high-value assets. FPVA finds new threats to a system and is not dependent on a list of known threats.\u0000 Manual assessment is labor-intensive, making the use of automated assessment tools quite attractive. We compared the results of FPVA to those of the top commercial tools, providing the first significant evaluation of these tools against a real-world known collection of serious vulnerabilities. While these tools can find common problems in a program's source code, they miss a significant number of serious vulnerabilities found by FPVA. We are now using the results of this comparison study to guide our future research into improving automated software assessment.","PeriodicalId":300613,"journal":{"name":"Cloud Computing Security Workshop","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127549494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Joshua Schiffman, Thomas Moyer, H. Vijayakumar, T. Jaeger, P. Mcdaniel
Customers with security-critical data processing needs are beginning to push back strongly against using cloud computing. Cloud vendors run their computations upon cloud provided VM systems, but customers are worried such host systems may not be able to protect themselves from attack, ensure isolation of customer processing, or load customer processing correctly. To provide assurance of data processing protection in clouds to customers, we advocate methods to improve cloud transparency using hardware-based attestation mechanisms. We find that the centralized management of cloud data centers is ideal for attestation frameworks, enabling the development of a practical approach for customers to trust in the cloud platform. Specifically, we propose a cloud verifier service that generates integrity proofs for customers to verify the integrity and access control enforcement abilities of the cloud platform that protect the integrity of customer's application VMs in IaaS clouds. While a cloud-wide verifier service could present a significant system bottleneck, we demonstrate that aggregating proofs enables significant overhead reductions. As a result, transparency of data security protection can be verified at cloud-scale.
{"title":"Seeding clouds with trust anchors","authors":"Joshua Schiffman, Thomas Moyer, H. Vijayakumar, T. Jaeger, P. Mcdaniel","doi":"10.1145/1866835.1866843","DOIUrl":"https://doi.org/10.1145/1866835.1866843","url":null,"abstract":"Customers with security-critical data processing needs are beginning to push back strongly against using cloud computing. Cloud vendors run their computations upon cloud provided VM systems, but customers are worried such host systems may not be able to protect themselves from attack, ensure isolation of customer processing, or load customer processing correctly. To provide assurance of data processing protection in clouds to customers, we advocate methods to improve cloud transparency using hardware-based attestation mechanisms. We find that the centralized management of cloud data centers is ideal for attestation frameworks, enabling the development of a practical approach for customers to trust in the cloud platform. Specifically, we propose a cloud verifier service that generates integrity proofs for customers to verify the integrity and access control enforcement abilities of the cloud platform that protect the integrity of customer's application VMs in IaaS clouds. While a cloud-wide verifier service could present a significant system bottleneck, we demonstrate that aggregating proofs enables significant overhead reductions. As a result, transparency of data security protection can be verified at cloud-scale.","PeriodicalId":300613,"journal":{"name":"Cloud Computing Security Workshop","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121189859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Secure information sharing across different organizations is an emerging issue for collaborative software development, product design, etc. Virtual domains have been proposed for this issue so far. A virtual domain is a collaborative workspace comprising virtual computer resources dedicated to a particular collaborative activity, and it is subject to information sharing policies that restrict the scope of information sharing within the domain. This paper proposes a method of constructing Content Oriented Virtual Domains, which leverages existing common services such as e-mail, Web, and file servers, therefore enabling us to construct a secure collaborative workspace at lower cost than existing methods that require such services to be reconstructed in the same domain. This paper also shows an experimental implementation of the method and its performance evaluation results.
{"title":"Content oriented virtual domains for secure information sharing across organizations","authors":"Takayuki Sasaki, Masayuki Nakae, Ryuichi Ogawa","doi":"10.1145/1866835.1866838","DOIUrl":"https://doi.org/10.1145/1866835.1866838","url":null,"abstract":"Secure information sharing across different organizations is an emerging issue for collaborative software development, product design, etc. Virtual domains have been proposed for this issue so far. A virtual domain is a collaborative workspace comprising virtual computer resources dedicated to a particular collaborative activity, and it is subject to information sharing policies that restrict the scope of information sharing within the domain.\u0000 This paper proposes a method of constructing Content Oriented Virtual Domains, which leverages existing common services such as e-mail, Web, and file servers, therefore enabling us to construct a secure collaborative workspace at lower cost than existing methods that require such services to be reconstructed in the same domain. This paper also shows an experimental implementation of the method and its performance evaluation results.","PeriodicalId":300613,"journal":{"name":"Cloud Computing Security Workshop","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126265522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Richard Chow, M. Jakobsson, R. Masuoka, J. Molina, Yuan Niu, E. Shi, Z. Song
Cloud computing is a natural fit for mobile security. Typical handsets have input constraints and practical computational and power limitations, which must be respected by mobile security technologies in order to be effective. We describe how cloud computing can address these issues. Our approach is based on a flexible framework for supporting authentication decisions we call TrustCube (to manage the authentication infrastructure) and on a behavioral authentication approach referred to as implicit authentication (to translate user behavior into authentication scores). The combination results in a new authentication paradigm for users of mobile technologies, one where an appropriate balance between usability and trust can be managed through flexible policies and dynamic tuning.
{"title":"Authentication in the clouds: a framework and its application to mobile users","authors":"Richard Chow, M. Jakobsson, R. Masuoka, J. Molina, Yuan Niu, E. Shi, Z. Song","doi":"10.1145/1866835.1866837","DOIUrl":"https://doi.org/10.1145/1866835.1866837","url":null,"abstract":"Cloud computing is a natural fit for mobile security. Typical handsets have input constraints and practical computational and power limitations, which must be respected by mobile security technologies in order to be effective. We describe how cloud computing can address these issues. Our approach is based on a flexible framework for supporting authentication decisions we call TrustCube (to manage the authentication infrastructure) and on a behavioral authentication approach referred to as implicit authentication (to translate user behavior into authentication scores). The combination results in a new authentication paradigm for users of mobile technologies, one where an appropriate balance between usability and trust can be managed through flexible policies and dynamic tuning.","PeriodicalId":300613,"journal":{"name":"Cloud Computing Security Workshop","volume":"56 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120825039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
To cater to the privacy requirements in cloud computing, we introduce a new primitive, namely Privacy Preserving Mapping (PPM) schemes supporting comparison. An PPM scheme enables a user to map data items into images in such a way that, with a set of images, any entity can determine the <, =, > relationships among the corresponding data items. We propose three privacy notions, namely ideal privacy, level-1 privacy, and level-2 privacy, and three constructions satisfying these privacy notions respectively.
{"title":"Privacy preserving mapping schemes supporting comparison","authors":"Qiang Tang","doi":"10.1145/1866835.1866846","DOIUrl":"https://doi.org/10.1145/1866835.1866846","url":null,"abstract":"To cater to the privacy requirements in cloud computing, we introduce a new primitive, namely Privacy Preserving Mapping (PPM) schemes supporting comparison. An PPM scheme enables a user to map data items into images in such a way that, with a set of images, any entity can determine the <, =, > relationships among the corresponding data items. We propose three privacy notions, namely ideal privacy, level-1 privacy, and level-2 privacy, and three constructions satisfying these privacy notions respectively.","PeriodicalId":300613,"journal":{"name":"Cloud Computing Security Workshop","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114879379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. Sandhu, R. Boppana, R. Krishnan, Jeff Reich, Todd Wolff, Josh Zachry
Even as cloud computing gains rapid traction in the commercial marketplace the twin concerns of availability and security remain paramount to potential customers, especially in the enterprise. Concurrently the vision of what cyber security means is itself changing. The US Department of Defense (henceforth DoD) has recently promulgated a new doctrine of mission assurance in contrast to the earlier approach of information assurance. We argue that this concept of mission assurance is equally applicable to the commercial sector, and has high relevance to the availability and security concerns of cloud computing. While the business community may prefer alternate terms such as "business application assurance," "business function assurance" or "mission effectiveness" we propose to stay with established DoD terminology. Our basic position is that in order to achieve mission assurance in the new paradigm of cloud computing we need to instrument the cloud with hooks and supporting protocols and mechanisms to enable deployment of mission-driven performance, resilience and security policies into the computing and communication infrastructure. The cloud must therefore evolve from its current mission-oblivious state to become mission-aware. This position paper speculates on the research challenges in making this happen.
{"title":"Towards a discipline of mission-aware cloud computing","authors":"R. Sandhu, R. Boppana, R. Krishnan, Jeff Reich, Todd Wolff, Josh Zachry","doi":"10.1145/1866835.1866839","DOIUrl":"https://doi.org/10.1145/1866835.1866839","url":null,"abstract":"Even as cloud computing gains rapid traction in the commercial marketplace the twin concerns of availability and security remain paramount to potential customers, especially in the enterprise. Concurrently the vision of what cyber security means is itself changing. The US Department of Defense (henceforth DoD) has recently promulgated a new doctrine of mission assurance in contrast to the earlier approach of information assurance. We argue that this concept of mission assurance is equally applicable to the commercial sector, and has high relevance to the availability and security concerns of cloud computing. While the business community may prefer alternate terms such as \"business application assurance,\" \"business function assurance\" or \"mission effectiveness\" we propose to stay with established DoD terminology. Our basic position is that in order to achieve mission assurance in the new paradigm of cloud computing we need to instrument the cloud with hooks and supporting protocols and mechanisms to enable deployment of mission-driven performance, resilience and security policies into the computing and communication infrastructure. The cloud must therefore evolve from its current mission-oblivious state to become mission-aware. This position paper speculates on the research challenges in making this happen.","PeriodicalId":300613,"journal":{"name":"Cloud Computing Security Workshop","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127542306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sören Bleikertz, M. Schunter, Christian W. Probst, D. Pendarakis, Konrad Eriksson
Cloud computing has gained remarkable popularity in the recent years by a wide spectrum of consumers, ranging from small start-ups to governments. However, its benefits in terms of flexibility, scalability, and low upfront investments, are shadowed by security challenges which inhibit its adoption. Managed through a web-services interface, users can configure highly flexible but complex cloud computing environments. Furthermore, users misconfiguring such cloud services poses a severe security risk that can lead to security incidents, e.g., erroneous exposure of services due to faulty network security configurations. In this article we present a novel approach in the security assessment of the end-user configuration of multi-tier architectures deployed on infrastructure clouds such as Amazon EC2. In order to perform this assessment for the currently deployed configuration, we automated the process of extracting the configuration using the Amazon API. In the assessment we focused on the reachability and vulnerability of services in the virtual infrastructure, and presented a way for the visualization and automated analysis based on reachability and attack graphs. We proposed a query and policy language for the analysis which can be used to obtain insights into the configuration and to specify desired and undesired configurations. We have implemented the security assessment in a prototype and evaluated it for practical scenarios. Our approach effectively allows to remediate today's security concerns through validation of configurations of complex cloud infrastructures.
{"title":"Security audits of multi-tier virtual infrastructures in public infrastructure clouds","authors":"Sören Bleikertz, M. Schunter, Christian W. Probst, D. Pendarakis, Konrad Eriksson","doi":"10.1145/1866835.1866853","DOIUrl":"https://doi.org/10.1145/1866835.1866853","url":null,"abstract":"Cloud computing has gained remarkable popularity in the recent years by a wide spectrum of consumers, ranging from small start-ups to governments. However, its benefits in terms of flexibility, scalability, and low upfront investments, are shadowed by security challenges which inhibit its adoption. Managed through a web-services interface, users can configure highly flexible but complex cloud computing environments. Furthermore, users misconfiguring such cloud services poses a severe security risk that can lead to security incidents, e.g., erroneous exposure of services due to faulty network security configurations.\u0000 In this article we present a novel approach in the security assessment of the end-user configuration of multi-tier architectures deployed on infrastructure clouds such as Amazon EC2. In order to perform this assessment for the currently deployed configuration, we automated the process of extracting the configuration using the Amazon API. In the assessment we focused on the reachability and vulnerability of services in the virtual infrastructure, and presented a way for the visualization and automated analysis based on reachability and attack graphs. We proposed a query and policy language for the analysis which can be used to obtain insights into the configuration and to specify desired and undesired configurations. We have implemented the security assessment in a prototype and evaluated it for practical scenarios. Our approach effectively allows to remediate today's security concerns through validation of configurations of complex cloud infrastructures.","PeriodicalId":300613,"journal":{"name":"Cloud Computing Security Workshop","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126492568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Remote Data Checking (RDC) is a technique by which clients can establish that data outsourced at untrusted servers remains intact over time. RDC is useful as a prevention tool, allowing clients to periodically check if data has been damaged, and as a repair tool whenever damage has been detected. Initially proposed in the context of a single server, RDC was later extended to verify data integrity in distributed storage systems that rely on replication and on erasure coding to store data redundantly at multiple servers. Recently, a technique was proposed to add redundancy based on network coding, which offers interesting tradeoffs because of its remarkably low communication overhead to repair corrupt servers. Unlike previous work on RDC which focused on minimizing the costs of the prevention phase, we take a holistic look and initiate the investigation of RDC schemes for distributed systems that rely on network coding to minimize the combined costs of both the prevention and repair phases. We propose RDC-NC, a novel secure and efficient RDC scheme for network coding-based distributed storage systems. RDC-NC mitigates new attacks that stem from the underlying principle of network coding. The scheme is able to preserve in an adversarial setting the minimal communication overhead of the repair component achieved by network coding in a benign setting. We implement our scheme and experimentally show that it is computationally inexpensive for both clients and servers.
{"title":"Remote data checking for network coding-based distributed storage systems","authors":"Bo Chen, Reza Curtmola, G. Ateniese, R. Burns","doi":"10.1145/1866835.1866842","DOIUrl":"https://doi.org/10.1145/1866835.1866842","url":null,"abstract":"Remote Data Checking (RDC) is a technique by which clients can establish that data outsourced at untrusted servers remains intact over time. RDC is useful as a prevention tool, allowing clients to periodically check if data has been damaged, and as a repair tool whenever damage has been detected. Initially proposed in the context of a single server, RDC was later extended to verify data integrity in distributed storage systems that rely on replication and on erasure coding to store data redundantly at multiple servers. Recently, a technique was proposed to add redundancy based on network coding, which offers interesting tradeoffs because of its remarkably low communication overhead to repair corrupt servers.\u0000 Unlike previous work on RDC which focused on minimizing the costs of the prevention phase, we take a holistic look and initiate the investigation of RDC schemes for distributed systems that rely on network coding to minimize the combined costs of both the prevention and repair phases. We propose RDC-NC, a novel secure and efficient RDC scheme for network coding-based distributed storage systems. RDC-NC mitigates new attacks that stem from the underlying principle of network coding. The scheme is able to preserve in an adversarial setting the minimal communication overhead of the repair component achieved by network coding in a benign setting. We implement our scheme and experimentally show that it is computationally inexpensive for both clients and servers.","PeriodicalId":300613,"journal":{"name":"Cloud Computing Security Workshop","volume":"123 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117320317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Secure management of Electronic Health Records (EHR) in a distributed computing environment such as cloud computing where computing resources including storage is provided by a third party service provider is a challenging task. In this paper, we explore techniques which guarantees security and privacy of medical data stored in the cloud. We show how new primitives in attribute-based cryptography can be used to construct a secure and privacy-preserving EHR system that enables patients to share their data among healthcare providers in a flexible, dynamic and scalable manner.
{"title":"Privacy preserving EHR system using attribute-based infrastructure","authors":"S. Narayan, Martin Gagné, R. Safavi-Naini","doi":"10.1145/1866835.1866845","DOIUrl":"https://doi.org/10.1145/1866835.1866845","url":null,"abstract":"Secure management of Electronic Health Records (EHR) in a distributed computing environment such as cloud computing where computing resources including storage is provided by a third party service provider is a challenging task. In this paper, we explore techniques which guarantees security and privacy of medical data stored in the cloud. We show how new primitives in attribute-based cryptography can be used to construct a secure and privacy-preserving EHR system that enables patients to share their data among healthcare providers in a flexible, dynamic and scalable manner.","PeriodicalId":300613,"journal":{"name":"Cloud Computing Security Workshop","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127042284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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