efficiency of multicasting, and establish an analytical worst-case bound for it. Finally, we propose On-line VP3 which dynamically updates the key assignment structure according to the dynamics of the communication group in a resource-efficient way. Index Terms — key distribution, secure group communication

to requests for different bandwidths, robustness to inaccurate routing information, and sensitivity to the routing information update frequency. It evaluates not only the performance of these algorithms for the sessions with bandwidth guarantees, but also their impact on the lower priority best

-data off chip: minimal off-chip lookup latency, bandwidthefficient meta-data updates, and off-chip lookup amortized over many prefetches. In this work, we show: (1) minimal off-chip meta-data lookup latency can be achieved through a hardware-managed main memory hash table, (2) bandwidth-efficient updates

research issues related to data security. One of the core security requirements is providing efficient mechanisms to ensure data integrity and authenticity while incurring minimal computation and bandwidth overhead. In this work, we investigate the problem of ensuring data integrity and suggest secure

to increase the efficiency of data accesses. The extra disk arms pay for themselves by providing extra bandwidth to the data, so that the cost of the overall system compares favorably with the cost of non-redundant disks. The basic idea is to have the mirrored disks out of phase with one handling reads

data as well as the overhead of multicast reliability. Moreover, tracedriven simulations show that the bandwidth saving over conventional approaches increases significantly as the audience size grows. We conclude that MMO provides efficient bandwidth utilization and service scalability, and makes

the next IR interval. Second, when the server updates a hot data item, all clients have to query the server and get the data from the server separately, which wastes a large amount of bandwidth. In this paper, we propose an IR-based cache invalidation algorithm, which can significantly reduce the query

The question of how to run X applications over telephone lines and other low bandwidth channels has gained much attention recently. In response, the X Consortium is working to define a standard called Low Bandwidth X (LBX) that will allow the X protocol to be transmitted more efficiently over

It is important to have continuously updated information about network resources and application activities after a wireless sensor network is deployed in unpredictable environment. Such information can help notify users of resource depletion or abnormal activities. However, the low user

by a factor of 30. Our linear-time merge algorithm exploits the underlying high compute and bandwidth resources of modern multi-core CPUs with architecture-aware optimizations and efficient parallelization. This enables compressed in-memory column stores to handle the transactional update rate required