排序方式： 共有5条查询结果，搜索用时 15 毫秒
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公钥能提供对称密钥无法提供的高安全等级。基于身份的加密技术密钥管理简单、无需第三方参与,但计算复杂度较高,不适用于无线传感网;组合公钥技术存储要求低而认证规模巨大,可在芯片级实现认证,适合无线传感网,但存在合谋攻击问题。基于身份的组合公钥认证方案,将上述技术进行优势整合,采用密钥因子矩阵取代双线性映射生成密钥,有效地降低了加密/解密计算的复杂度,从而节省了网络能耗;密钥因子矩阵基于簇生成,极大地减少了密钥存储空间,并抵御了合谋攻击。从理论上分析了方案的安全性,并通过仿真实验,证明方案在计算复杂度和能效方面具有较大的优势。 相似文献
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Ten milligram of pure gold foil was given by mouth for 16 days. Routine blood chemistry was done before and after gold therapy and repeated after 3 weeks of cessation of therapy. All the blood values were well within normal range and variations, except the enzymes—creatine phosphokinase and lactate dehydrogenase, which decreased substantially on gold foil ingestion indicating possible inhibition of these blood enzymatic activity by gold. 相似文献
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The decreased serum levels of triiodothyroinine (T3) and thyroxine (T4) in hypothyroid patients is well established but whether
there is any correlation of creatinephosphokinase (CPK) with hypothyroidism is not well established. There is a paucity of
reference on this study. Therefore a study of serum CPK and thyroid profile was carried out in thyroid diseases. In hypothyroid
patients T3, T4 levels in serum were found to be lowered with an increase level of thyroid stimulating hormone (TSH) associated
with marked rise in serum CPK level. In hyperthyroid patients serum levels of T3, T4 were found to be increased with decrease
in TSh with significant decrease in creatine phosphokinase level. Serum creatine phosphokinase levels thus show an inverse
relation with serum T3, T4 levels. 相似文献
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身份认证解决云计算中信息安全威胁的重要手段之一。身份认证的本质是根据用户所知道的东西、拥有的东西或所具有的生物特征来确认用户身份。现有的使用密码技术的身份认证技术主要由三种:基于公钥基础设施(PKI)的、基于组合公钥(CPK)的、基于身份加密(IBE)的。文章通过几种身份认证技术的原理以及特点的对比,分析出各自的优势。 相似文献
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跆拳道运动员比赛前后最大耗氧量、血乳酸及血清LDH活性变化的研究 总被引：3，自引：0，他引：3
通过对跆拳道比赛后血乳酸、血清 L DH高度比的研究 ,以期为我国跆拳道运动的训练提供依据 相似文献
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