We propose and analyze a scalable and efficient cluster-based group key management protocol for secure group communications in mobile ad hoc networks. For scalability and dynamic reconfigurability; we take a cluster-based approach by which group members are broken in to cluster-based subgroups and leaders in subgroups securely communicate with each other to agree on a group key in response to membership change and member mobility events. We show that secrecy requirement for group communication is satisfied. Further, there exists an optimal clus ....etc

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Presented By:
Qijun Gu, Peng Liu, Wang-Chien Lee, and Chao-Hsien Chu
Abstract”
Wireless broadcast is an effective approach to disseminate data to a number of users. To provide secure access to data in wireless broadcast services, symmetric key-based encryption is used to ensure that only users who own the valid keys can decrypt the data. Regarding various subscriptions, an efficient key management to distribute and change keys is in great demand for access control in broadcast services. In this paper, we propose an efficient k ....etc

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 Introduction
The operating system is the heart of any computer system. It controls input/output, peripherals, and provides the platform on which all applications and processes run. This research considers two operating systems that are used widely: windows 7 and windows XP. It tries to see the common different between these two operating systems and discover the users' opinions about them. Also, it tries to see the references description for them.
 Definition of operating system
An operating system i ....etc

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:heart:WMI SEMENAR REPORT
Many IT departments are expected to maintain business operations effectively, but often with limited resources, leaving little time to implement proactive processes and procedures to minimize their exposure to threats. Small and Medium Businesses (SMB’s) are even further restricted by strict budget requirements and IT tasks are often fulfilled by someone in a dual role with little in-depth knowledge. With so many business and IT requirements to be met, overstretc ....etc

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Can Storage Area Networks (SANs) be simple to install and use for
the small and medium-sized business? Is it possible to provide basic
storage resource management functions for administrators to use without
having to purchase an expensive management application?

With the new storage management functions included with Microsoft®
Windows Server„¢ 2003 R2 and the work done by various storage
vendors, the goal of achieving a Simple SAN has been met,
including the use of fibre channel and iSCSI storage technologies. This
p ....etc

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Abstract
Three-party authenticated key exchange protocol(3PAKE) is an important cryptographic technique for securecommunication which allows two parties to agree a new securesession key with the help of a trusted server. In this paper, weproposed a new three-party authenticated key exchange protocolwhich aims to achieve more efficiency with the same security levelof other existing 3PAKE protocols. Security analysis and formalverification using AVISPA tools show that the proposed protocolis secure against various known attacks. Comparin ....etc

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