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部分加密防御SQL注入攻击 总被引：1，自引：0，他引：1
简要介绍了SQL注入式攻击的原理.在前人提出的"对用户输八信息实施过滤"的技术基础上,使用部分数据加密方式防止SQL注入.加密之后的数据,其数据长度不变,数据库的存储量不增加.加/解密速度足够快,数据操作响应时间让用户能够接受. 相似文献
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SQL注入攻击是计算机数据库安全方面的重要问题,黑客通过SQL注入攻击对数据库进行非法访问。随着B/S系统的应用和发展,按照此模式编写的应用程序越来越多,但是程序编程过程中不同程序员的经验是不一样的,代码编写过程中用户输入数据合法性判断方面存在问题,导致用户输入数据信息安全性没有形成一个有效的判断标准,程序安全隐患相对较多。实际应用过程中用户输入一段数据库查询代码,程序的执行策略决定返回结果,通过程序执行获取想要的结果,通过所说的SQL Injection,即SQL注入。通过数据库访问策略分析,可以解决SQL注入攻击方面的问题。 相似文献
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在分析数据库安全的内涵和安全机制的基础上,详细论述SQL Server的安全策略。介绍SQL Server数据库的安全设置,并提出SQL Server数据库应用时的安全措施。 相似文献
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浅谈SQL Server数据库应用技巧 总被引：1，自引：0，他引：1
本文详细讨论了SQL Server索引视图和分区视图,并分析了SQL Server数据库的安全策略、数据库性能优化方法及数据库数据恢复方法,以便为SQL Server数据库应用提供可行性建议. 相似文献
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在介绍SQL Server 2000下的数据库数据导入导出方法的基础上,着重讨论了如何实现基于网页的数据库数据导入. 相似文献
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文章在介绍SQL Server 2000下的数据库数据导入导出方法的基础上,着重讨论了如何实现基于网页的数据库数据导入. 相似文献
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文章旨在研究用嵌入式SQL语言开发SQL Server数据库应用的方法.首先介绍了C语言与SQL Server2000的嵌入式SQL的形式,然后给出嵌入式SQL语句与C宿主语言之间的通信方式及程序结构,最后给出了代码实例. 相似文献
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本文就SQL Server的安全认证进行分析,针对可能存在的安全问题,从登录帐号的管理、用户存取权限的管理、SQL Server端口的管理、数据库的备份与恢复等方面提出了一些解决方法和建议。 相似文献
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针对SQL的注入技术及Microsoft SQL Server的安全性配置进行研究与分析。首先,对SOL进行了介绍,然后,从用户、网络和服务器3个角度对网络应用安全结构进行了分析,最后,重点阐述了SQL注入攻击技术以及相应的Microsoft SQL Server安全配置。 相似文献
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本文介绍了一种基于STM32芯片的远程升级系统的设计方案。简述了从数据下载线、客户端、服务器到数据库MYSQL设计的全部过程,并提供了客户端、服务器的通信细节分析,提供了升级操作的可靠性和便利性。 相似文献
12.
Chang-Yang Lee 《Research Policy》2009,38(7):1159-1171
This study aims to evaluate whether firms located in clusters invest more intensively in research and development (R&D) than their non-clustered counterparts. Specifically, it proposes a model of firm R&D and tests empirically its implications for the effect of being located in a cluster on firm R&D intensity. The key ideas underlying the theory are as follows: (1) due either to natural excludability or to a high degree of stickiness of R&D-opportunity-bearing technological knowledge, geographical proximity per se is limited in the (automatic) spillover of knowledge with promising R&D opportunities to nearby firms; (2) geographical proximity may, however, help enhance the effectiveness or efficiency of knowledge exchange through market mechanisms (e.g., through contract R&D, R&D collaboration); (3) potential advantages (or disadvantages) in firm R&D of being located in a cluster also depend on the degree of asymmetry in technological competence among firms located in the cluster. The key ideas are supported by an empirical analysis of a multi-industry, multi-country data set compiled by the World Bank. In particular, the results show that being located in a cluster per se actually has a negative effect on firm R&D intensity, which is in contrast to the conventional wisdom of pure or automatic localized knowledge spillovers, as far as firm R&D intensity is concerned. 相似文献
13.
Manel Antelo 《Research Policy》2003,32(3):367-390
This paper deals with the problem faced by a patentee owning a new production process whose value is unknown ex ante. The patentee must license the new technology to users in order to profit from it, and each potential licensee has production costs using the technology that are unknown to everyone until after contracting, at which point each licensee gets private information about her own costs. Moreover, the patentee cannot observe outputs of potential licensees and, therefore, must use lump-sum rather than per unit royalty schedules to license the technology. In this setting, the optimal licensing scheme from both the industry and the innovator viewpoints is defined, as well as the socially optimal dynamic industrial structure to market the technology. Welfare aspects of regulation on patents length are also discussed in this context. 相似文献
14.
Jay Inghwee Chok 《Research Policy》2009,38(5):710-725
The Food and Drug Administration (FDA) uses scientific procedures to evaluate regulated firms’ new product applications. Much of its basic intellectual resources, in the form of scientific advisory committee members, come from research institutions. Regulated firms may seek connections to the FDA advisory committee members to affect the regulatory approval process. However, individual linkages may fail. The use of Scientific Advisory Boards (SAB) with multiple members provides redundant ties to the regulator, which means that the failure of each tie becomes less material. This paper is principally concerned with the firm's motivation to rebalance power imbalances rather than any actual regulatory outcomes. Controlling for alternative explanations, I find that dependence on the regulator is positively associated with the probability of having a SAB. Selected network diagrams add credibility to the hypothesis. 相似文献
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钱家驹 《中国科学院研究生院学报》1984,22(3):227-230
This paper deals with some species of Lunathyrium Koidz. in N. E. Asia;
including the eastern mountainous district of N. E. China; Far East Region of U. S. S. R.; Korea and Japan. 相似文献
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The innovative broadband Internet industry is characterised by inertia phenomena in terms of technology choice, as well as selection of Internet service providers (ISPs). Within the set of firms providing the Internet, very often in Europe the incumbent operator has the lion's share of end-customers and supplies the dominant technology. Focusing on the French case, this paper shows that although inertia on the supply side (partly due to the regulation process itself), helps to explain the technology mix reached to date, a more complete picture of the inertia can be obtained when we consider the existence of costs faced by customers when switching between ISPs. We calculate these so-called “switching costs”. The closing section of this paper derives several implications in terms of policy. 相似文献
18.
Torsten Oliver Salge 《Research Policy》2012,41(4):720-733
This article explores the temporal trajectories of innovative search. Drawing on conceptual ideas from the behavioural theory of the firm, it proposes that the level of temporal persistence in organisations’ innovative search activities is affected by four key factors. These include (i) the mode of innovative search as well as organisations’ (ii) strategic aspirations, (iii) slack resources and (iv) performance feedback. This conceptual model is tested in the context of public hospital services in England. Results from dynamic panel data analyses reveal stronger temporal persistence in science- than in practice-based innovative search activities. Findings also suggest that specialist hospitals relying on a continuous stream of new products, services and processes to meet their strategic aspirations are better positioned to sustain science-based innovative search activities than their generalist counterparts. Similarly, results uncover a positive association between the availability of financial slack and hospitals’ ability to continuously engage in superior levels of science-based innovative search. Contrary to theoretical expectations, however, positive performance feedback does not appear to have any persistence-enhancing effect. 相似文献
19.
Marco Cucculelli 《Research Policy》2012,41(5):808-821
This study contributes to the recent empirical literature on the innovation-firm performance relationship by investigating the effect of product introduction on firm growth in a sample of Italian firms from 2000 to 2006. We adopted a novel approach that exploits the interpretative content of the tenure of the last product introduced (i.e., the number of years since its first introduction) as an additional variable into the explanatory scheme of firm sales growth rate. This variable aims to capture peculiar characteristics of new goods, such as their novelty and complexity. The estimated results confirmed the relevance of this model specification and helps in understanding the reason why previous studies have failed to find a statistically robust relationship between product innovation and growth. Moreover, we found the following: first, the release of a new product enhances growth opportunity among multiproduct firms; second, product development promotes the growth of firms belonging to sectors with stronger commitment to research and development; and third, new product development enhances firm growth substantially in those sectors that absorb externally originated patents. 相似文献
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We examine how R&D portfolios of drug pipelines affect pharmaceutical licensing, controlling firm size, diversity, and competition. The data collected comprises 434 license-ins and 329 license-outs closed by 54 Japanese pharmaceutical companies between 1997 and 2007. We pay special attention to stage-specific licensing by dividing the innovation process into early and late stages. Joint estimates of license-in and license-out using seemingly unrelated regressions (SUR) reveal that drug pipelines significantly affect stage-specific licensing, inducing portfolio effect that lead to smoothing drug pipelines across early and late stages. 相似文献