Abstract—We consider the problem of mesh-pull based video broadcast in peer-to-peer networks. We propose a novel algo- rithm for constructing the distribution overlay, where peers are arranged in neighborhoods that exhibit similar latency values from the origin media server. We analyze the properties of the resulting mesh and show that it increases data sharing between neighbors, hence improves the system performance compared to random,constructions. The nodes are further equipped with a novel streaming strategy that is built on utility-based packet

When two threads access the shared memory without being synchronized, and at least one performs a write operation, they form a data race. Data races are widely considered the symptom of bugs in multithreaded programs, and a huge amount of work has been done in order to detect them. The key issue in order to statically discover data races via abstract interpretation in Java programs is to develop a specific alias analysis that abstracts references, as (i) the shared memory is the heap, and it is accesses by reference (ii) monitors are defined on objects, and so they are identified by reference. This paper presents a combination of may- and must- alias analyses, in order to capture precise information on accesses and synchronization. Moreover, we provide information on missing locks if a possible data race is detected. The analysis has been implemented and tested. Our approach is based on abstract interpretation theory and it analyzes a subset of Java bytecode.

Abstract—This paper addresses the problem of the transmission of scalable video streams to a set of heterogeneous clients through a common bottleneck channel. The packet scheduling policy is typically crucial in such systems that target smooth media playback at all the receivers. In particular, the playback delays and the transmission strategy for the packets of the different layers have to be chosen carefully. When the same video is sent simultaneously to multiple clients that subscribe to different parts of the stream, the playback delay cannot be jointly minimized for all the clients. We therefore propose delay optimization strategies along with low complexity solutions for a fair distribution of the delay penalty

Background: For the last few years the International Workshop on Practice and Theory in Public-Key Cryptography has been the main annual workshop focusing on research on all as- pects of public-key cryptography. The rst workshop was organized in 1998 in Japan. Other PKCs have taken place in Australia, France, Japan, South Korea, Singapore, and USA. Since 2003, PKC is an IACR workshop. PKC has attracted papers from world-renowned sci- entists in the area. Topics of Interest: The topics of interest are all aspects of public-key cryptography including theory, design, analysis, implementation, and applications of public-key cryptography. Conference Venue: PKC 2005 will be held at the Congress house in Les Diablerets, Switzer- land. Les Diablerets is a little village located in the Alps at the foot of a glacier. The village offers several winter sport activities such as ski, snowboard or sledging. The top of the glacier can be visited taking a cable-car at any time of the year. More information about Les Diablerets is available on http://www.diablerets.ch. Social Events: The social program includes a welcome reception, a free afternoon and a ban- quet. The banquet will be held at the Eurotel Victoria. Some additional social events will be proposed such as sledging followed by a cheese fondue. Registration: Details about workshop registration are on the PKC 2005 website. Hotel regis- trations should be done separately and since January is a busy period an early hotel booking is strongly recommended. Accommodation: The principal hotel in Les Diablerets is the Eurotel Victoria. This four stars hotel is located at about 200 meters of the Congress house. For some information or a booking at the hotel and cancellation policy, you can directly contact the hotel Eurotel Victoria by phone, fax, email or directly from the web. Mention that you are a participant of PKC 2005! Web Address: http://www.eurotel-victoria.ch/lesdiablerets/frameseteng/frameset.htm