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As evolving security concerns have prevailed, the network time synchronization protocol community has been actively engaged in the development of improved security mechanisms for both the IEEE 1588 Precision Time Protocol (PTP) and the IETF Network Time Protocol (NTP). These activities have matured to the point where this year should see the finalization of the first new security mechanisms for time...
As the number of user-managed devices continues to increase, the need for synchronizing multiple file hierarchies distributed over devices with ad hoc connectivity, is becoming a significant problem. In this paper, we propose a new approach for efficient cloud-based synchronization of an arbitrary number of distributed file system hierarchies. Our approach maintains both the advantages of peer-to-peer...
This paper presents a realistic method for exploiting an already known insecurity of the congestion control behavior of the transmission control protocol that was originally pointed out in 1999 and that affects all known TCP implementations. This insecurity exploits the fundamental assumption of TCP that the communicating remote end is trustworthy and is behaving correctly. We developed a methodology...
A PKI in support of secure Internet routing was first proposed in [1] and refined in later papers, e.g., [2]. In this ldquoResourcerdquo PKI (RPKI) the resources managed are IP address allocations and Autonomous System number (AS #) assignments. The RPKI presents a very different implementation challenge from a typical PKI,in that in the RPKI every relying party needs to validate every certificate...
Collecting data on user activities is one of the fundamental middleware services in Web-enabled systems. The collected data is analyzed and used by various high-level services, like user profiling, accounting, security auditing, and system health monitoring. In this paper, we present architecture and performance evaluation of usage tracking components for service-oriented middleware systems. Presented...
Expected growth in use and implementation of wireless sensor networks (WSNs) in different environments and for different applications creates new security challenges. In WSNs, a malicious node may initiate incorrect path information, change the contents of data packets, and even hijack one or more genuine network nodes. As the network reliability completely depends on individual nodespsila presence...
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