瑞星安全周报

据瑞星“云安全”系统统计,近期瑞星共截获了668658个钓鱼网站,共有408万网民遭遇钓鱼网站攻击。根据瑞星安全专家介绍,知名病毒“安德夫后门”近期再次发力,它的最新变种非常狡猾,能通过免杀和不直接启动等方式躲避杀毒软件的查杀,并将自身隐蔽得非常安全。     

半月病毒播报

病毒名称:Worm/AutoRun.acs中文名:U 盘寄生虫变种 acs病毒类型:蠕虫病毒长度:14780字节影响平台:Win 9X/ME/NT/2000/XP/2003Worm/AutoRun.acsU 盘寄生虫变种 acs 是U 盘寄生虫蠕虫家族的最新成员之一,采用 VC++编写,并经过加壳处理。U 盘寄生虫变种 acs 运行后,在 C 盘根目录     

半月病毒播报

病毒名称:"IRC波特变种GEL(Backdoor.Win32.IRCbot.gel)"病毒病毒类型:后门病毒影响平台:Windows NT/2000/XP/2003该病毒运行后复制自身到驱动程序目录下,文件名为wmiadapi.exe,并在注册表     

半月病毒播报

代理蠕虫变种SL（Worm．Win32．VB．sl）”病毒;“灰鸽子变种CNA（Backdoor．Win32．Gpigeon2007．cna）”病毒;“千里马穿墙下载者变种A（Worrn．Win32．QDH．a）”病毒。     

Backbone analysis and algorithm design for the quadratic assignment problem

As the hot line in NP-hard problems research in recent years, backbone analysis is crucial for phase transition, hardness, and algorithm design. Whereas theoretical analysis of backbone and its applications in algorithm design are still at a begin- ning state yet, this paper took the quadratic assignment problem （QAP） as a case study and proved by theoretical analysis that it is NP-hard to find the backbone, i.e., no algorithm exists to obtain the backbone of a QAP in polynomial time. Results of this paper showed that it is reasonable to acquire approximate backbone by inter- section of local optimal solutions. Furthermore, with the method of constructing biased instances, this paper proposed a new meta-heuristic -- biased instance based approximate backbone （BI-AB）, whose basic idea is as follows： firstly, construct a new biased instance for every QAP instance （the optimal solution of the new instance is also optimal for the original one）; secondly, the approximate backbone is obtained by intersection of multiple local optimal solutions computed by some existing algorithm; finally, search for the optimal solutions in the reduced space by fixing the approximate backbone. Work of the paper enhanced the research area of theoretical analysis of backbone. The meta-heuristic proposed in this paper provided a new way for general algorithm design of NP-hard problems as well.     

快速识别“大无极变种F”病毒

相信看过系统应用栏目中“风言风语”大家已经对“Sobig-F”(大无极变种F）有了一个初步了解它的传播速度可达到1分钟发送300封病毒邮件的速     

Improvement of McCullagh-Barreto key agreement with KCI-security

McCullagh-Barreto key agreement protocol and its variant achieve perfect forward security and key generation center (KGC) forward security, but provide no resistance to key compromise impersonation attack (KCI attack). In this paper, we give a formal treatment of key compromise impersonation (KCI) attack and define the security notion against it. Then an variant of McCullagh-Barreto protocol is presented with only one more Hash operation. The improved protocol preserves perfect forward security and KGC forward security, and furthermore is proved to be secure against KCI attack under k-Gap-BCAA1 assumption.     

我国主要烟草青枯病病圃青枯菌系统发育分析

为探究我国主要植烟区烟草青枯病鉴定病圃中青枯菌的系统发育,采用演化型分类框架下的序列变种分类方法,对从各烟株和土壤样品中分离得到的100株青枯菌进行系统发育分析。结果表明,所有菌株可归为4个分支,分别为序列变种15、17、34、54。其中,云南文山州广南县病圃中的菌株为序列变种17和54,福建泰宁县的菌株为序列变种34,福建三明市三元区的菌株为序列变种15和34,广东白云区的菌株为序列变种15和17,广东南雄市的菌株为序列变种15、17和34,安徽宣城市宣州区的菌株为序列变种34和54,贵州福泉的菌株为序列变种17,重庆彭水的菌株为序列变种17。本研究发现同一病圃中存在多个序列变种,某些病圃同一地块中烟株与土壤分离所得菌株序列变种不一致。     

小心：近期电脑病毒三宗“最”

近期，可以说是一个病毒的“多产期”。除了维金、灰鸽子等重大病毒的变种频繁出现之外，一些垃圾邮件病毒、网银木马、游戏木马等也异常活跃。据金山毒霸反病毒专家介绍，近期一些高危病毒的变种频出如维金、灰鸽子等。而且病毒采用的技术越来越先进，攻击的手段越来越隐蔽。总体来讲，近期爆发的病毒中以三“最”病毒最为猖獗．提醒广大用户需特别警惕。[编者按]     

June病毒在线

病毒名称：“清醒”变种S 病毒类型：蠕虫病毒 危险等级：★★★ 传播途径：电子邮件 危害系统：windows 9x/NT/2000/XP 该病毒变种第一次运行时会显示“Error:CRC not completa”的消息框，随后搜索用户计算机上所有常用格式的文件，从中提取电子邮件地址，并向这些地址发送带毒邮件。