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To keep open network more efficacious and secure, it is necessary that a nice trust model and method of trust management must be developed. The reason why traditional trust models are incomplete in their function to manage trust is explained, and a general model based on hybrid trust model and introducer protocol is provided.The hybrid model is more flexible and efficacious to manage trust compared with hierarchy model and Web model.The introducer protocol is a better solution to build, maintain and refresh the trust relationship in open network environment. 相似文献
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Statistical language modeling techniques are investigated so as to construct a language model for Chinese text proofreading. After the defects of n-gram model are analyzed, a novel statistical language model for Chinese text proofreading is proposed. This model takes full account of the information located before and after the target word wi, and the relationship between un-neighboring words wi and wi in linguistic environment(LE). First,the word association degree between wi and wj is defined by using the distance-weighted factor, wi is l words apart from wi in the LE, then Bayes formula is used to calculate the LE related degree of word wi, and lastly, the LE related degree is taken as criterion to predict the reasonability of word wl that appears in context. Comparing the proposed model with the traditional n-gram in a Chinese text automatic error detection system, the experiments results show that the error detection recall rate and precision rate of the system have been improved. 相似文献
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在组播认证协议TESLA的基础上引入消息分散算法,提出一个全新的组播认证协议,它能够为不稳定信道上的组播通信提供实时认证。文章最后给出了该协议详细的性能分析。该文提出的组播认证协议是要为每个数据包增加60~80字节的认证信息就可以为很高丢包率(≈50%)的组播通信提供99%以上的实时认证率。协议还增加了系统的可扩展性,可以为分布更广、组员规模更大的组播应用提供安全认证。 相似文献
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电子政务审批系统的设计和实现 总被引:2,自引:1,他引:2
对电子政务中应用的工作流技术以及IBM的工作流管理系统MQ Worknow做了简要介绍,提出了使用MQ Workflow作为工作流建模和执行平台,设计和实现了一个基于Web的网上审批系统,并将Web Senrice技术融合进来,实现了工作流系统对Web服务的调用。 相似文献