Electronic mail systems are one of the oldest generic services. They became very popular in the early seventies. They are useful as soon as the computer is a multi-user system. You do not need to have a network. Of course, with the venue of the Internet and the exploded requirements

This PhD research is concerned with the analysis of the Internet infrastructure supply across the European cities and the results that this allocation may have for the economic development of the cities. This research’s main assumption is that the Internet is first and foremost an infrastructure

The pervasive and ubiquitous nature of the Internet coupled with growing concerns about cyber terrorism demand immediate solutions for securing the Internet infrastructure. So far, the research in Internet security primarily focused on securing the information rather than securing

Die ZBW räumt Ihnen als Nutzerin/Nutzer das unentgeltliche, räumlich unbeschränkte und zeitlich auf die Dauer des Schutzrechts beschränkte einfache Recht ein, das ausgewählte Werk im Rahmen der unter

Abstract — We present the design and evaluation of I4, a network infrastructure that enables information exchange and collaboration among different domains. I4 can help address problems, such as defending against the unwanted traffic as well as diagnosing the network. We present the Distributed

to adequately address security. Recent outages and security analyses clearly indicate that the Internet routing infrastructure is highly vulnerable. Moreover, the design and ubiquity of BGP has frustrated past efforts at securing interdomain routing. This paper considers the vulnerabilities of existing

Abstract—Namespaces are fundamental to computing systems. Each namespace maps the names that clients use to retrieve resources to the actual resources themselves. However, the indirection that namespaces provide introduces avenues of attack through the name resolution process. Adversaries can trick programs into accessing unintended resources by changing the binding between names and resources and by using names whose target resources are ambiguous. In this paper, we explore whether a unified system approach may be found to prevent many name resolution attacks. For this, we examine attacks on various namespaces and use these to derive invariants to defend against these attacks. Four prior techniques are identified that enforce aspects of name resolution, so we explore how these techniques address the proposed invariants. We find that each of these techniques are incomplete in themselves, but a combination could provide effective enforcement of the invariants. We implement a prototype system that can implement these techniques for the Linux filesystem namespace, and show that invariant rules specific to each, individual program system call can be enforced with a small overhead (less than 3%), indicating that fine-grained name resolution enforcement may be practical. I.

Mobile phone security is a relatively new field that is gather-ing momentum in the wake of rapid advancements in phone system technology. Mobile phones are now becoming so-phisticated smart phones that provide services beyond ba-sic telephony, such as supporting third-party applications. Such third-party applications may be security-critical, such as mobile banking, or may be untrusted applications, such as downloaded games. Our goal is to protect the integrity of such critical applications from potentially untrusted func-tionality, but we find that existing mandatory access con-trol approaches are too complex and do not provide formal integrity guarantees. In this work, we leverage the sim-plicity inherent to phone system environments to develop a compact SELinux policy that can be used to justify the integrity of a phone system using the Policy Reduced In-tegrity Measurement Architecture (PRIMA) approach. We show that the resultant policy enables systems to be proven secure to remote parties, enables the desired functionality for installing and running trusted programs, and the resul-tant SELinux policy is over 90 % smaller in size. We envision that this approach can provide an outline for how to build high integrity phone systems.

, enterprises, and governments have always placed restrictions on end-user communication to meet social or legal goals we argue recent years have seen the beginning of a new trend—the co-option of the Internet infrastructure itself to affect large-scale censorship. In this paper, we use Internet routing

Attempts to generalize the Internet's point-to-point communication abstraction to provide services like multicast, anycast, and mobility have faced challenging technical problems and deployment barriers. To ease the deployment of such services, this paper proposes an overlay-based Internet