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基于Linux环境下的IPS实现算法研究及性能测试 总被引:1,自引:0,他引:1
入侵防御系统(IPS)是继入侵检测系统(IDS)之后网络安全领域的一个新的研究方向,它既可以用来检测,又可以用来防御和阻止攻击。文中首先讨论了在Linux操作系统下的入侵防御系统,然后给出了建立入侵防御系统的3种算法,并对其性能做了测试、比较和分析,最后讨论了进一步需要研究的问题。 相似文献
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氮化铝-铝复合封装基板的制备 总被引:2,自引:0,他引:2
采用磁控溅射法在阳极氧化预处理过的铝板上沉积氮化铝薄膜,制备氮化铝-铝复合基板。制备的氮化铝为非晶态,抗电强度超过700 V/μm,阳极氧化铝抗电强度达75 V/μm。当阳极氧化铝膜厚约10μm、氮化铝膜约1μm时,制备的复合封装基板击穿电压超过1350 V,绝缘电阻率1.7×106 MΩ·cm,氮化铝与铝板的结合强度超过8 MPa;阳极氧化铝膜作为缓冲层有效缓解了氮化铝与铝热膨胀系数失配的问题,在260℃热冲击下,铝板未发生形变,氮化铝膜未破裂,电学性能无明显变化。氮化铝与阳极氧化膜的可见光高透性保持了镜面抛光金属铝的高反射率,当该复合基板应用于LED芯片COB封装时,有助于提高封装光效。 相似文献
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Efficient computation of Tate pairing is a crucial factor for practical applications of pairing-based cryptosystems(PBC). Recently, there have been many improvements for the computation of Tate pairing, which focuses on the arithmetical operations above the finite field. In this paper, we analyze the structure of Miller’s algorithm firstly, which is used to implement Tate pairing. Based on the characteristics that Miller’s algorithm will be improved tremendous if the order of the subgroup of elliptic curve group is low hamming prime, a new method for generating parameters for PBC is put forward, which enable it feasible that there is certain some subgroup of low hamming prime order in the elliptic curve group generated. Finally, we analyze the computation efficiency of Tate pairing using the new parameters for PBC and give the test result. It is clear that the computation of Tate pairing above the elliptic curve group generating by our method can be improved tremendously. 相似文献
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