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Proposes the use of a special purpose drop‐in firewall/VPN gateway called Sieve, that can be inserted between the mobile workstation and the network to provide individualized security services for that particular station. Sieve is meant to be used like an external modem: the user only needs to plug it in. Its existence is transparent to the user, requiring no modification to the workstation configuration. To function in this role, Sieve has been designed to be compact, low‐cost, requiring little administration or maintenance. Discusses the features and advantages of the system and demonstrates how Sieve was used in various application areas (home, university environment, etc.).

The trend towards ever‐larger WWW sites with hundreds of thousands of pages maintained by teams of developers has made apparent the need for tools to manage such large‐scale efforts. In this paper we present a mechanism for organising and manipulating groups of nodes and links in WWW sites. These constructs are used to create dynamic views of the data in a given site according to various organisational and presentational criteria. Moreover, proven techniques for the management of hypertext networks (e.g. versioning, variants, etc.) can be readily implemented through the use of this model. Additionally, the model allows the creation of user views through the combination of these constructs via a number of operations. After the description of our model we present a prototype system developed at the University of Geneva that demonstrates how the mechanisms included in our model can be integrated into an existing http server. We then examine how the same mechanisms can be employed in the management of large WWW sites.

The authors have developed the “Ethernet Speaker” (ES), a network‐enabled single board computer embedded into a conventional audio speaker. Audio streams are transmitted in the local area network using multicast packets, and the ES can select any one of them and play it back. A key requirement for the ES is that it must be capable of playing any type of audio stream, independent of the streaming protocol, or the encoding used. The authors achieved this by providing a streaming audio server built using the kernel‐based audio stream redirector (ASR) in the OpenBSD kernel. The ASR accepts input from any of the existing audio file players, or streaming audio clients. Since all audio applications have to be able to use the system audio driver, this system can accommodate any protocol or file format, provided that there exists some compatible player running under OpenBSD. This paper discusses the design and implementation of the server as an ASR, the streaming protocol developed for this application, and the implementation of the client.