公钥基础设施(PKI)应用中的信任问题与安全解决方案

详细论述受信证书链的替换原理、方法和过程,及其引发的用户错误受信问题。通过分析得到安全证书链的长度为小于3,但由于实际应用的业务需要和安全性需要,证书链的长度通常至少为3。最后针对上述问题给出了一种安全解决方案,通过结合存储用户个人证书的USBKEY硬件设备,采用物理信任点代替逻辑信任点来防止受信证书的替换,为用户构建安全可靠的网络信任环境。     

Journalism and Science: How to Erode the Idea of Knowledge

This paper discusses aspects of the relationship between the scientific community and the public at large. Inspired by the European public debate on genetically modified crops and food, ethical challenges to the scientific community are highlighted. This is done by a discussion of changes that are likely to occur to journalistic attitudes – mirroring changing attitudes in the wider society – towards science and scientific researchers. Two journalistic conventions – those of science transmission and of investigative journalism – are presented and discussed in relation to the present drive towards commercialization within the world of science: how are journalists from these different schools of thought likely to respond to the trend of commercialization? Likely journalistic reactions could, while maintaining the authority of the scientific method, be expected to undermine public trust in scientists. In the long term, this may lead to an erosion of the idea of knowledge as something that cannot simply be reduced to the outcome of negotiation between stakeholders. It is argued that science is likely to be depicted as a fallen angel. This may be countered, it is posited, by science turning human, by recognizing its membership of society, and by recognizing that such membership entails more than just commercial relations. To rethink its relationship with the public at large – and, in particular, to rethink the ideal of disinterested science – is an ethical challenge facing the scientific community.     

From Trust to Trustworthiness: Why Information is not Enough in the Food Sector

The many well-publicized food scandals in recent years have resulted in a general state of vulnerable trust. As a result, building consumer trust has become an important goal in agri-food policy. In their efforts to protect trust in the agricultural and food sector, governments and industries have tended to consider the problem of trust as merely a matter of informing consumers on risks. In this article, we argue that the food sector better addresses the problem of trust from the perspective of the trustworthiness of the food sector itself. This broad idea for changing the focus of trust is the assumption that if you want to be trusted, you should be trustworthy. To provide a clear understanding of what being trustworthy means within the food sector, we elaborate on both the concept of trust and of responsibility. In this way we show that policy focused on enhancing transparency and providing information to consumers is crucial, but not sufficient for dealing with the problem of consumer trust in the current agri-food context.     

The Grain of Spatially Referenced Economic Cost and Biodiversity Benefit Data and the Effectiveness of a Cost Targeting Strategy

Facing tight resource constraints, conservation organizations must allocate funds available for habitat protection as effectively as possible. Often, they combine spatially referenced economic and biodiversity data to prioritize land for protection. We tested how sensitive these prioritizations could be to differences in the spatial grain of these data by demonstrating how the conclusion of a classic debate in conservation planning between cost and benefit targeting was altered based on the available information. As a case study, we determined parcel‐level acquisition costs and biodiversity benefits of land transactions recently undertaken by a nonprofit conservation organization that seeks to protect forests in the eastern United States. Then, we used hypothetical conservation plans to simulate the types of ex ante priorities that an organization could use to prioritize areas for protection. We found the apparent effectiveness of cost and benefit targeting depended on the spatial grain of the data used when prioritizing parcels based on local species richness. However, when accounting for complementarity, benefit targeting consistently was more efficient than a cost targeting strategy regardless of the spatial grain of the data involved. More pertinently for other studies, we found that combining data collected over different spatial grains inflated the apparent effectiveness of a cost targeting strategy and led to overestimation of the efficiency gain offered by adopting a more integrative return‐on‐investment approach.     

Individual-Oriented and Neighborhood Protecting Health Actions: The Critical Role of Environmental Education Seeking Behavior

A relationship between individual health-oriented actions and neighborhood civic activities is proposed, as is a relationship between these behaviors and a personality that seeks information from multiple sources. The proposed relationship was tested with a sample of 367 residents of New Jersey, USA. Respondents who had their eyes examined and screening tests for chronic diseases, and engaged in other individually oriented health-protecting behaviors were also more likely to have engaged in neighborhood civic activities, such as calling on elected officials and participating in neighborhood functions. As expected, specific personality attributes were associated with both sets of health-protecting activities, including outreach to multiple sources for information and help, a strong sense of efficacy, and trust of authority and neighbors. The relationship between personality and health-protecting behaviors was confounded by age and formal education. However, the relationship with personality measures persisted after controlling for age and education. The shortcomings of the research are reviewed, and implications of these observations for building a broader theory that links environmental education to civic engagement and individual health-protecting behaviors are discussed.     

Boundary spanners as trust ambassadors in collaborative natural resource management

Collaboration is a growing trend in agency-led natural resource management in the USA, carrying the promise of defusing conflict and incorporating a broader range of stakeholder ideas. However, concerns exist that confrontational or litigious groups may use collaborative forums to their organization's own advantage. We conducted case studies on three collaboratives to understand how these efforts have influenced the behavior of environmental groups who were previously at odds with the managing agency, the US Forest Service. Results suggest that trust between boundary spanners from historically adversarial groups can support a realignment of the accountabilities they feel. As rational, affinitive, and procedural trust developed, boundary spanners began to advocate, within their home organizations, for the collaborative's goals. Key activities driving these realignments included the development of fair and transparent procedures governing the collaborative group, structured interaction designed to build consensus, and planned informal interactions that revealed shared values among collaborative participants.     

Revisiting the trustworthiness–trust relationship: Exploring the differential predictors of cognition- and affect-based trust

We seek to develop a better understanding of interpersonal trust by bridging the gap between two heretofore distinct paradigms of trust. One paradigm views trust in terms of two dimensions: cognition- and affect-based. The other paradigm views trust as being distinct from trustworthiness, which has four dimensions: ability, behavioral integrity, benevolence, and values congruence. Currently, theoretical consensus is lacking about the antecedents of cognition- and affect-based trust in the first paradigm that incorporates insights from research on trustworthiness in the second paradigm. We show that this lack of consensus is problematic for internal knowledge development and external knowledge expansion. Thus, we join both paradigms by theorizing that ability and behavioral integrity are the most important predictors of cognition-based trust, whereas benevolence and values congruence are the most important predictors of affect-based trust. Across two samples, we found that our predictions were largely supported. Based on relative weights analysis, ability and behavioral integrity were more important than values congruence in predicting cognition-based trust, and benevolence was more important than ability in predicting affect-based trust. Furthermore, we found evidence that these relationships were largely robust to changes in the referent of analysis.     

Trust in Citizen Science Research: A Case Study of the Groundwater Education Through Water Evaluation & Testing Program1

Thornton, Teresa and Jessica Leahy, 2012. Trust in Citizen Science Research: A Case Study of the Groundwater Education Through Water Evaluation & Testing Program. Journal of the American Water Resources Association (JAWRA) 48(5): 1032‐1040. DOI: 10.1111/j.1752‐1688.2012.00670.x Abstract: Data collected by citizen scientists, including K‐12 students, have been validated by the scientific community through quality assurance/quality control tests and publication of results in peer‐reviewed journal articles. However, if citizen science data are to be used by local communities, research is needed to determine which factors contribute to local community member trust in citizen science data, and how to increase the benefits and use of citizen science programs. This article describes the Groundwater Education Through Water Evaluation & Testing (GET WET!) program that employs middle and high school students, state and local government employees, environmental nongovernmental organization leaders, business representatives, college faculty and students, and other volunteers as citizen scientists to create a database of groundwater quality for use as a baseline for local water resources management. Data were gathered through semi‐structured interviews pre‐ and post‐involvement from 40 participants in this citizen science program conducted in five states in the northeastern United States. Results indicate that factors of trust are largely based on interpersonal trust and familiarity. We conclude with recommendations and future research that may improve local community member willingness to trust citizen science data generated by students.     

参加交通部溢油应急技术代表团赴美培训的启示和思考

交通部于2002年5月31日—6月20日组织各直属海事局从事船舶防污染管理的17名专业人员赴美国考察、培训海上溢油应急技术。代表团参观了美国海岸警卫队、环保局、溢油应急办公室和防污基金等单位。文中总结了美国现行的海上溢油应急反应体系和防污基金的建立和管理，提出了建立中国在防治海上溢油和防污基金的设想。     

新建核电站风险信息沟通实证研究

随着我国近年核电产业的迅速扩张,核风险管理已成为社会各界关注甚至争议的热点.核风险沟通是核突发事件预防、应对及恢复的关键要素,对核风险管理具有重要的影响.然而,对如何与核电站周边风险群体进行有效沟通还知之甚少.为弥补这个缺憾,作者走访了山东海阳在建核电站相关管理人员并对周边常住居民进行问卷调查,以了解他们对核电发展的态度.文章描述了风险沟通的基本框架,意识到公众信任和信息公开的重要性.结果发现我国核能发展决策是由政府部门、核能企业和科研院所组成的"铁三角"主导的,受访者获取核信息的最主要途径是媒体,相对于其它渠道,超过51%的公众更相信政府发布的信息,更多受访者不愿意接受核风险和反对在当地建设核电站.最后提出了有效风险沟通的基本原则.研究结论对未来核电风险管理具有重要指导意义,也对利益相关方具有参考价值.