In this paper we analyze three and a half years of HTTP traffic observed at a small research institute to characterize the evolution of various facets of web operation. While our dataset is modest in terms of user population, it is unique in its temporal breadth. We leverage the longitudinal data to study various characteristics of the traffic, from client and server behavior to object and conn...

This paper analyzes the web browsing behaviour of Tor users. By collecting HTTP requests we show which websites are of interest to Tor users and we determined an upper bound on how vulnerable Tor users are to sophisticated de-anonymization attacks: up to 78 % of the Tor users do not use Tor as suggested by the Tor community, namely to browse the web with TorButton. They could thus fall victim t...

| Signiicant research on the Web is performed using logs collected from proxies and servers. Virtually all of these logs are from sites running the 1.0 version (or earlier) of HTTP. After four years a draft-standard speciication of HTTP/1.1 has emerged. However , many proxies and servers still use HTTP/1.0, and most so-called HTTP/1.1 servers do not employ all of the key features available in t...

We propose an extension to the HTTP protocol that allows specification of domain borders in the form of fences – a service provider is empowered with the ability to specify what exactly they would like to accept as being within their domain. The extension also provides a second asset which is a policy specification or data visa; these visas specify what types of data can be brought into the fen...

Data security plays an essential role in today’s web service. Secure HTTP (HTTPS) is one of the popular protocols to transfer sensitive data over the Internet. This paper shows how the security affects performance compared to HTTP. Based on our preliminary measurements, the average response time ranges from 0.1 to 5 seconds, and from 6 to 8 seconds, for HTTP and HTTPS, respectively. Our experim...

The increasing use of the web for serving http content, for database transactions, etc. can place heavy stress on servers. Flash crowds can occur at a server when there is a burst of a large number of clients attempting to access the service, and an unprepared server site could be overloaded or become unavailable. This paper discusses an extension to the http protocol that allows graceful perfo...

Bruce A. Mah [email protected] The Tenet Group Computer Science Division University of California at Berkeley Berkeley, CA 94720-1776 The workload of the global Internet is dominated by the Hypertext Transfer Protocol (HTTP), an application protocol used by World Wide Web clients and servers. Simulation studies of IP networks will require a model of the traSJic putterns of the World Wide Web...

The Semantic Web is built upon distributed knowledge published on the Web. But this vision cannot be implemented without some basic publishing rules to make the data readable for machines. Publication of RDF vocabularies must receive special attention due to their important role in the Semantic Web architecture. In this paper we describe a scripting web-based application that validates the comp...

Wir beschreiben die Implementierung eines einfachen verdeckten Zeitkanals über HTTP und evaluieren dessen Kapazität im Internet. Im Experiment kommunizierte ein leicht modifizierter Apache-Webserver mit einem selbst geschriebenen HTTP-Proxy auf der Seite des Clients. Optimiert man den Kanal auf Fehlerfreiheit, können 3 Bit/s übertragen werden; akzeptiert man bis zu 10 % Fehler, sind 14 Bit/s mö...

HTTP Header Linking draft-nottingham-http-link-header-02 Status of this Memo By submitting this Internet-Draft, each author represents that any applicable patent or other IPR claims of which he or she is aware have been or will be disclosed, and any of which he or she becomes aware will be disclosed, in accordance with Section 6 of BCP 79. Internet-Drafts are working documents of the Internet E...