The RC4 stream cipher is used to protect messages from eavesdroppers in many settings, including some of the Transport Layer Security (TLS) protocols used to secure much internet traffic. Nonuniformities in the output of a stream cipher are a weakness that an eavesdropper can exploit to gain information about the encrypted messages. In this report we verify the size of some nonuniformities of R...

The Stream Control Transmission Protocol (SCTP) is a new general-purpose transport layer protocol developed by the IETF. Compared with TCP, SCTP has two distinct features: multi-homing and multi-stream. Our work investigates the SCTP performance in various network environments, and its availability for different applications. This paper proposes a SCTP multi-homing scheme as the transport layer...

As the paper explains, it is crucial to epistemology in general and to the theory of causation in particular to investigate the properties of conditional independence as completely as possible. The paper summarizes the most important results concerning conditional independence with respect to two important representations of epistemic states, namely (strictly positive) probability measures and ...

1 Facultatea de Electronica, Telecomunica ii i Tehnologia Informa iei, Catedra Comunica ii, Str. Gh. Bari iu, 26-28, Cluj-Napoca, email: [email protected] Abstract – This paper presents a study of audio-video streaming using the additional possibilities of a DVB-S card. The board used for experiments (Technisat SkyStar 2) is one of the most frequently used cards for this purpose. Using...

The urban stream syndrome may not be limited to streams in urbanized watersheds. We measured the spatial pattern of impervious cover in ∼82,800 small watersheds across the conterminous United States by comparing watershed-based and stream-based measures of imperviousness. The watershed-based measure was the commonly used watershed percentage impervious cover. The stream-based measure was the pe...

The MPEG-2 Transport Stream (TS) has been widely accepted not only for providing digital TV services, but also as a subnetwork technology for building IP networks. This document describes a Unidirectional Lightweight Encapsulation (ULE) mechanism for the transport of IPv4 and IPv6 Datagrams and other network protocol packets directly over the ISO MPEG-2 Transport Stream as TS Private Data. ULE ...

Combining multi-Parametric Sensitivity Analysis (MPSA) with stream transport modeling is proposed to determine the relative importance of physical and biogeochemical processes controlling natural attenuation of contaminants. The MPSA is based on a large number of Monte-Carlo simulations to identify the sensitive parameters over a broad range of each parameter. This combined approach is applied ...

This paper is essentially a treatment of the theoretical and practical aspects of the new IPTV service. The central part of the paper constitutes a detailed presentation of analysis scenarios and results, and addresses the following issues in particular: What influence does the encoding rate have of on QoE values? What effect does the most obtrusive impairment factor in a network, i.e. packet l...

Encryption and compression are frequently used together in both network and storage systems, for example in TLS. Despite often being used together, there has not been a formal framework for analyzing these combined systems; moreover, the systems are usually just a simple chaining of compression followed by encryption. In this work, we present the first formal framework for proving security in c...

The rigorous evolution equation for the one-body distribution function f(t) describing an imperfect gas is not closed according to the investigations of Bogoliubov, Born, Green, Kirkwood, Yvon and others (B—B—G—K-Y hierarchy). The analysis of this equation is made in terms of connected diagrams. It is shown that in the bulk limit this equation can rigorously be transformed into an equation whic...