Abstract—Today, botnets have become a serious threat to enterprise networks. By creation of network of bots, they launch several attacks, distributed denial of service attacks (DDoS) on networks is a sample of such attacks. Such attacks with the occupation of system resources, have proven to be an effective method of denying network services. Botnets that launch HTTP packet flood attacks agains...

Most discussions of Internet privacy, both policy and technology, tend to assume Alan Westin’s perspective [20], which defines privacy as the ability for people to determine for themselves “when, how, and to what extent, information about them is communicated to others”. However, this focus on controlling information access has been found to be flawed [7]. This year’s technology press is filled...

New topics, most notably the World Wide Web, have put considerable pressure on the Computer Science curriculum. Computing Curricula 2001 represents a consensus that topics in the core must be reduced to accommodate new topics as they emerge. Unfortunately, digital logic has been reduced to 1/3 its original coverage. We argue that more core coverage should be given to digital logic, and that it ...

Abstract  This document specifies a way to create a stateful session with HTTP requests and responses. It describes  three new headers, Cookie, Cookie2, and Set-Cookie2, which carry state information between participating origin servers and user agents. The method described here differs from Netscape’s Cookie proposal [Netscape], but it can interoperate with HTTP/1.0 user agents that use Nets...

We discuss the performance effects of using per-transaction TCP connections for HTTP access, and the proposed optimizations of avoiding per-transaction re-connection and TCP slow-start restart overheads. We analyzed the performance penalties of the interaction of HTTP and TCP. Our observations indicate that the proposed optimizations do not affect Web access for the vast majority of users. Most...

The HTTP protocol, as currently used in the World Wide Web, uses a separate TCP connection for each file requested. This adds significant and unnecessary overhead, especially in the number of network round trips required. We analyze the costs of this approach and propose simple modifications to HTTP that, while interoperating with unmodified implementations, avoid the unnecessary network costs....

We present ontologydesignpatterns.org (ODP), a semantic web portal about ontology design patterns based on wiki technology, which aims at supporting a community around best practices for ontology design. ODP offers services for evaluation and training about ontology patterns, and a repository of OWL ontologies. ODP fosters several kinds of participation, from anonymous, read-only access to open...

Browsing histories are often used to build user profiles for browsing supports and personalizations. But, the browsing history also contains HTTP requests generated concomitantly with user activity(concomitant request), which must be removed in order to build correct user profiles. Current filtering methods are based on rather simple characteristics of requests such as the extension of the file...

We report on the results of the Protocol Design Group of the W3C's HTTP ``Next Generation'' Activity. The group produced and measured a prototype that shows it is possible, largely using familiar engineering principles, to make simultaneous improvements in the following problem areas of HTTP/1.1 [Fie99]: (1) the layering of other application protocols over HTTP, (2) modularity and extensibility...