Cultures in Community Question Answering

CQA services are collaborative platforms where users ask and answer questions. We investigate the influence of national culture on people's online questioning and answering behavior. For this, we analyzed a sample of 200 thousand users in Yahoo Answers from 67 countries. We measure empirically a set of cultural metrics defined in Geert Hofstede's cultural dimensions and Robert Levine's Pace of Life and show that behavioral cultural differences exist in community question answering platforms. We find that national cultures differ in Yahoo Answers along a number of dimensions such as temporal predictability of activities, contribution-related behavioral patterns, privacy concerns, and power inequality.Comment: Published in the proceedings of the 26th ACM Conference on Hypertext and Social Media (HT'15

From Social Data Mining to Forecasting Socio-Economic Crisis

Socio-economic data mining has a great potential in terms of gaining a better understanding of problems that our economy and society are facing, such as financial instability, shortages of resources, or conflicts. Without large-scale data mining, progress in these areas seems hard or impossible. Therefore, a suitable, distributed data mining infrastructure and research centers should be built in Europe. It also appears appropriate to build a network of Crisis Observatories. They can be imagined as laboratories devoted to the gathering and processing of enormous volumes of data on both natural systems such as the Earth and its ecosystem, as well as on human techno-socio-economic systems, so as to gain early warnings of impending events. Reality mining provides the chance to adapt more quickly and more accurately to changing situations. Further opportunities arise by individually customized services, which however should be provided in a privacy-respecting way. This requires the development of novel ICT (such as a self- organizing Web), but most likely new legal regulations and suitable institutions as well. As long as such regulations are lacking on a world-wide scale, it is in the public interest that scientists explore what can be done with the huge data available. Big data do have the potential to change or even threaten democratic societies. The same applies to sudden and large-scale failures of ICT systems. Therefore, dealing with data must be done with a large degree of responsibility and care. Self-interests of individuals, companies or institutions have limits, where the public interest is affected, and public interest is not a sufficient justification to violate human rights of individuals. Privacy is a high good, as confidentiality is, and damaging it would have serious side effects for society.Comment: 65 pages, 1 figure, Visioneer White Paper, see http://www.visioneer.ethz.c

How Do Tor Users Interact With Onion Services?

Onion services are anonymous network services that are exposed over the Tor network. In contrast to conventional Internet services, onion services are private, generally not indexed by search engines, and use self-certifying domain names that are long and difficult for humans to read. In this paper, we study how people perceive, understand, and use onion services based on data from 17 semi-structured interviews and an online survey of 517 users. We find that users have an incomplete mental model of onion services, use these services for anonymity and have varying trust in onion services in general. Users also have difficulty discovering and tracking onion sites and authenticating them. Finally, users want technical improvements to onion services and better information on how to use them. Our findings suggest various improvements for the security and usability of Tor onion services, including ways to automatically detect phishing of onion services, more clear security indicators, and ways to manage onion domain names that are difficult to remember.Comment: Appeared in USENIX Security Symposium 201

Indecent Exposure: Do Warrantless Searches of Cell Phones Violate the Fourth Amendment?

This article argues that searches of student’s cell phone should require a warrant in most circumstances. The amount and personal nature of information on a smart phone warrants special Fourth Amendment protection. This issue is particularly relevant in the public school setting where administrators routinely confiscate phones from students caught using them in school. With more frequency, administrators are looking at the phones, scrolling through text messages and photos, and on some occasions, responding to text messages. The U.S. Supreme Court in Safford v. Redding, acknowledges the special considerations that school children should be afforded in part because of the unique subjective view they have of their own privacy. This same unique perspective should similarly be applied to the contents of a student’s cell phone. Over 75% of teenagers carry a cell phone on a daily basis, and many use the device as a private diary and portal for personal data and information. Teens appear willing to capture in their phone’s text or photos their most private world, and this might seem to signal a renunciation of their privacy. However it is because teens are so willing to expose themselves in a world that they think is private that their expectation of privacy in their phones should be accorded substantial protection. Cell phones in and of themselves are not dangerous. They cannot hold drugs or weapons - only information about drugs or weapons. Given that a cell phone contains highly private information, poses no imminent danger, and its contents can be preserved while a warrant is obtained, school officials should be required to get a warrant unless there are exigent circumstances such as immediate, apparent threat to student safety

The Role of User Psychological Contracts in the Sustainability of Social Networks

Many emergent ventures, such as social networks, leverage crowd-sourced information assets as essential pillars supporting their business models. The appropriation of rights to information assets through legal contracts often fails to prevent conflicts between the users and the companies that claim information rights. In this paper, we focus on social networks and examine why those conflicts arise and what their consequences are by drawing on psychological contract theory. We propose that intellectual property and privacy expectancies comprise core domains of psychological contracts between social networks and their users. In turn, perceived breaches of those expectancies trigger a psychological contract violation. We use the exit, voice, loyalty, and neglect typology to define the user behavioral outcomes. We evaluated our framework by surveying 598 Facebook users. The data support our framework and indicate that perceived breaches of privacy and intellectual property rights generate the affective experience of a psychological contract violation, which is strongly associated with exit intentions

Psychological Contracts in Information Exchanges

Information assets continue to grow in importance of contribution to economic activity. Many emergent businesses, including Google, Amazon and Facebook, leverage crowd-sourced information assets as essential pillars supporting their business models. The appropriation of rights to information assets is commonly done through legal contracts. In practice this approach often fails to prevent conflicts between the information contributors and the companies claiming information rights. In research presented here I attempt to understand when and why the conflicts arise. I draw on psychological contract theory and I develop the framework of psychological contracts in information exchanges. I propose that intellectual property and privacy expectancies comprise core domains of psychological contracts in information exchanges. The proposed framework predicts that perceived breach of expectancies in relation to intellectual property rights and/or privacy triggers the affective experience of psychological contract violation characterized by feelings of anger and betrayal which undermines the sustainability of information exchanges. I also develop and evaluate a nomological network of antecedents and consequences associated with perceptions of a psychological contract breach in information exchanges. I investigate the effects of psychological ownership of information and privacy concerns as antecedents of perceived breach of intellectual property rights and privacy respectively. I also evaluate the attitudinal and behavioral adjustments which follow the affective experience of psychological contract violation. I examine the effects of psychological contract violation on commitment and cynicism attitudes and I use the exit, voice, loyalty and neglect typology to evaluate the behavioral outcomes which result from psychological contract violations. I evaluate the proposed framework in the context of information exchanges on a social networking site by surveying 598 Facebook users. The empirical data support the core hypotheses in proposed framework and indicate that perceptions of a privacy breach and/or an intellectual property breach trigger the affective experience of a psychological contract violation which is most strongly associated with exit intentions. These findings point to the critical role of psychological contracts in influencing the sustainability of information exchanges and offer a novel theoretical lens for examining sustainability of information exchanges across different contexts

Are anonymity-seekers just like everybody else? An analysis of contributions to Wikipedia from Tor

User-generated content sites routinely block contributions from users of privacy-enhancing proxies like Tor because of a perception that proxies are a source of vandalism, spam, and abuse. Although these blocks might be effective, collateral damage in the form of unrealized valuable contributions from anonymity seekers is invisible. One of the largest and most important user-generated content sites, Wikipedia, has attempted to block contributions from Tor users since as early as 2005. We demonstrate that these blocks have been imperfect and that thousands of attempts to edit on Wikipedia through Tor have been successful. We draw upon several data sources and analytical techniques to measure and describe the history of Tor editing on Wikipedia over time and to compare contributions from Tor users to those from other groups of Wikipedia users. Our analysis suggests that although Tor users who slip through Wikipedia's ban contribute content that is more likely to be reverted and to revert others, their contributions are otherwise similar in quality to those from other unregistered participants and to the initial contributions of registered users.Comment: To appear in the IEEE Symposium on Security & Privacy, May 202

Study of Fundamental Rights Limitations for Online Enforcement through Self-Regulation

The use of self-regulatory or privatized enforcement measures in the online environment can give rise to various legal issues that affect the fundamental rights of internet users. First, privatized enforcement by internet services, without state involvement, can interfere with the effective exercise of fundamental rights by internet users. Such interference may, on occasion, be disproportionate, but there are legal complexities involved in determining the precise circumstances in which this is the case. This is because, for instance, the private entities can themselves claim protection under the fundamental rights framework (e.g. the protection of property and the freedom to conduct business). Second, the role of public authorities in the development of self-regulation in view of certain public policy objectives can become problematic, but has to be carefully assessed. The fundamental rights framework puts limitations on government regulation that interferes with fundamental rights. Essentially, such limitations involve the (negative) obligation for States not to interfere with fundamental rights. Interferences have to be prescribed by law, pursue a legitimate aim and be necessary in a democratic society. At the same time, however, States are also under the (positive) obligation to take active measures in order to ensure the effective exercise of fundamental rights. In other words, States must do more than simply refrain from interference. These positive obligations are of specific interest in the context of private ordering impact on fundamental rights, but tend to be abstract and hard to operationalize in specific legal constellations. This study’s central research question is: What legal limitations follow from the fundamental rights framework for self-regulation and privatized enforcement online? It examines the circumstances in which State responsibility can be engaged as a result of selfregulation or privatized enforcement online. Part I of the study provides an overview and analysis of the relevant elements in the European and international fundamental rights framework that place limitations on privatized enforcement. Part II gives an assessment of specific instances of self-regulation or other instances of privatized enforcement in light of these elements