Terminal (informatique)

vignette|Un terminal DEC VT100. En informatique, un terminal est une variété de périphérique réseau placé à l'extrémité d'un nœud. Le terminal est un point d’accès de communication entre l'homme et un ordinateur central ou un réseau d'ordinateurs. Dans un réseau décentralisé de type client-serveur il correspond aujourd'hui à l'association minimale d'un périphérique de saisie (clavier) ou de pointage (souris) et d'un moniteur reliés à l'unité centrale. Sous Unix et en génie logiciel, il désigne par abus de langage une fenêtre d'invite de commande donnant accès à un shell Unix. Histoire Avant l'arrivée de la micro-informatique et des ordinateurs individuels (PC ou Macintosh) sur les bureaux, jusque dans les années 1980, le coût et la place requise pour un ordinateur étaient tels que l'ordinateur était dans une pièce et les périphériques dans une autre. Les terminaux étaient soit des pupitres de commande (périphérique d'entrées-sorties, combinaison d'un clavier, d'un panneau

À propos de ce résultat

Cette page est générée automatiquement et peut contenir des informations qui ne sont pas correctes, complètes, à jour ou pertinentes par rapport à votre recherche. Il en va de même pour toutes les autres pages de ce site. Veillez à vérifier les informations auprès des sources officielles de l'EPFL.

Publications associées (27)

Publications associées

Chargement

Personnes associées (2)

Personnes associées

Chargement

Unités associées (4)

Unités associées

Chargement

Concepts associés (70)

Concepts associés

Chargement

Cours associés (16)

Cours associés

Chargement

Séances de cours associées (27)

Séances de cours associées

Chargement

Broadcast Encryption and Traitor Tracing for Conditional Access Systems

Alexandre Karlov

In the context of the thesis we are studying the notions of broadcast encryption and traitor tracing in an industrial framework of conditional access systems related to Pay-TV. Broadcast encryption represents a cryptographic primitive which allows confidential transmission of content on a broadcast channel in such a way that only an authorized subset of users defined by the broadcaster are able to access it. Traitor tracing is a mechanism for identifying rogue sources who shared their decryption keys. Combined together, these two methods can be used to identify compromised terminals and instantaneously revoke them. Intuitively these two techniques are of high interest for Pay-TV systems with respect to the threats of today. Today, the majority of industrial security system are based on the tamper-resistance against attacks, such as those exploiting, for instance, different side channel information such as time, power consumption, electromagnetic emanations to name a few. However during recent years these attacks became more and more sophisticated. Therefore the aim of this thesis is to propose new schemes and mechanisms to improve the state-of-the-art for the conditional access systems and more specifically Pay-TV systems so that they rely even more on a solid cryptographic basis. As a matter of fact, even though many cryptographic schemes closely related to the subject of this thesis existed since many years in academia, none of them could have been deployed directly and efficiently in the context of large scale Pay-TV system which puts a number of heavy constraints on the bandwidth as well as on the computational complexity of the receivers. Consequently we will also describe the system and its constraints in order to simplify the task of development and integration of future schemes in these two academic domains in the context of practical environment.

EPFL2011

Chargement

Open-Loop Power Sharing of Three-Port DC-DC Resonant Converters

Drazen Dujic, Francisco Daniel Freijedo Fernández, Yan-Kim Tran

Multi-port DC-DC converters are an attractive solution for highly flexible and efficient interface of different elements of DC grids (e.g., sources, loads, energy storage). This paper provides an analytic solution for the natural power sharing characteristics of a galvanically isolated three-port resonant DC-DC converter. A DC-transformer operation mode is considered, with two ports actively transferring power to a third port. The mathematical model reveals that the power sharing characteristics are tightly dominated by the resonant tank parameters, even though they are also dependent on the differential voltage at the input terminals and the system losses. The accuracy of the proposed model is verified by an experimental validation on a lab-scale prototype.

IEEE2019

Chargement

Open-Loop Power Sharing Characteristic of a Three-Port Resonant LLC Converter

Drazen Dujic, Francisco Daniel Freijedo Fernández, Yan-Kim Tran

The Solid State Transformer (SST) is an attractive solution for highly flexible, cost-effective, compact and efficient power transfer among different grids. Furthermore, a three-port topology is proven as a suitable solution to integrate energy storage resources, the key functionality of emerging SST concept. Among other alternatives, the resonant LLC series resonant converter (SRC) is the cost-effective solution to implement the DC-transformer functionality, which is a core part of the SST. This paper addresses the power sharing characteristics and the zero-voltage switching (ZVS) conditions of a galvanically isolated three-port SRC, operated in DC-transformer mode. A mathematical model, which effectively decouples principal from circulating currents and power flows, is proposed and developed. This new mathematical framework eases the analysis; and reveals a constant power sharing characteristic tightly dominated by the resonant tank parameters even though some degrees of freedom are allowed thanks to the introduction of a differential voltage at the input terminals. Subsequently, design aspects and assessments of working operation conditions are also reported. The accuracy of the proposed model is verified by experimental validation on a lab-scale prototype.

2019

Chargement

CS-108: Practice of object-oriented programming

Les étudiants perfectionnent leurs connaissances en Java et les mettent en pratique en réalisant un projet de taille conséquente. Ils apprennent à utiliser et à mettre en œuvre les principaux types de collections (listes, ensembles, tables associatives), et examinent quelques patrons de conception.

CS-438: Decentralized systems engineering

A decentralized system is one that works when no single party is in charge or fully trusted. This course teaches decentralized systems principles while guiding students through the development and testing of their own decentralized system incorporating messaging, encryption, and blockchain concepts.

EE-519: Bioelectronics and biomedical microelectronics

The course covers the fundaments of bioelectronics and integrated microelectronics for biomedical and implantable systems. Issues and trade-offs at the circuit and systems levels of invasive microelectronic systems as well as their eluding designs, methods and classical implementations are discussed

Ordinateur

Un ordinateur est un système de traitement de l'information programmable tel que défini par Alan Turing et qui fonctionne par la lecture séquentielle d'un ensemble d'instructions, organisées en progr

Interface en ligne de commande

vignette|300px|Capture d'écran d'un shell Bash sous Gentoo. Une interface en ligne de commande ou ILC (en anglais command line interface, couramment abrégé CLI) est une interface homme-machine dans

American Standard Code for Information Interchange

L'American Standard Code for Information Interchange (Code américain normalisé pour l'échange d'information), plus connu sous l'acronyme ASCII (, ), est une norme informatique de codage de caractère