NSI 1ère & Terminale
Détails Mis à jour : 5 mai 2021 Affichages : 62474 Pourquoi prendre la spécialité NSI : Numérique et Sciences Informatiques ? La spécialité NSI est ouverte aux lycéennes et lycéens qui veulent s’approprier des concepts et des méthodes qui fondent l’informatique. Au programme L'horaire hebdomadaire est de 4h en 1re et 6 h en terminale.Quatre grands domaines sont abordés : les données, les algorithmes, les langages, les machines (dont les objets connectés et les réseaux), et leurs systèmes d’exploitation.Cet enseignement favorise les travaux pratiques et la réalisation de projets. Des projets variés Une partie des cours (au moins un quart de l'horaire) est consacrée aux projets des élèves.En première comme en terminale, par petits groupes, ils doivent imaginer des solutions pour répondre à un besoin.Les sujets sont variés. Plusieurs parcours d’études supérieures recrutent NSI : Les classes préparatoires MP2I Lors de la rentrée 2021, il y aura 27 classes préparatoires MP2I en France : Compléments
Python Tutor - Visualize Python, Java, C, C++, JavaScript, TypeScript, and Ruby code execution
Introduction to Cryptography Basic Principles
Whenever we come across the term cryptography, the first thing and probably the only thing that comes to our mind is private communication through encryption. There is more to cryptography than just encryption. In this article, we will try to learn the basics of cryptography. The Basic Principles 1. In a simplest form, encryption is to convert the data in some unreadable form. 2. This is another important principle of cryptography. 3. Now, one problem that a communication system can face is the loss of integrity of messages being sent from sender to receiver. 4. What happens if Alice sends a message to Bob but denies that she has actually sent the message? Types of Cryptography There are three types of cryptography techniques : Secret key CryptographyPublic key cryptographyHash Functions 1. This type of cryptography technique uses just a single key. The biggest problem with this technique is the distribution of key as this algorithm makes use of single key for encryption or decryption. 2.
The Enigma - Example
The Enigma machine gives a mechanised way of performing one alphabetic substitution cipher after another. In this example we are only concerned with the encipherment of a single letter. We will suppose that the basic Enigma has been loaded with the rotors I, II, III. and that the centre rotor M is II and effects: and that the left hand rotor L is I and effects: Suppose the input character is G. Now the current reaches the reflector, which we will suppose is the standard B reflector, effecting: (Note that the reflector only has 13 connections, i.e. So the reflector effects F -> S. The current now goes back through the three rotors. The left hand rotor (inverse) effects: The middle rotor (inverse) effects: The right hand rotor (inverse) effects: Using these tables we see that The left hand rotor effects S -> S The centre rotor effects S -> E The right hand rotor effects E -> P So finally we find that with the basic Enigma with this order and position of its rotors, Input key = G, Output lamp = P.
Convertisseuse de base
wims.unice.fr Convertisseuse de base Le nombre écrit en base dix s'écrit 34 en base seize . Tapez pi pour e pour , sqrt(2) pour = 1.41421... Utilisez impérativement les lettres majuscules pour les représentations en base > 10. Les opérations algébriques + - * / ^ sont admises, ainsi que des paires de parenthèses. Haut de page Auteur de la page: Gang XIAO
Filius - Herunterladen
Systemvoraussetzung Ab Filius 1.12 ist im Installationsprogramm für Windows die Java-Laufzeitumgebung enthalten. Eine Installation von Java ist damit keine Voraussetzung mehr, um Filius starten zu können. Für alle anderen Varianten (Ubuntu, Zip) gilt, dass ab Filius 2.5 für die Nutzung Java 17 (oder höher) erforderlich ist. Das Erstellen und kompilieren eigener Anwendungen in Filius über den Softwareassistenten erfordert darüber hinaus, dass die Java-Laufzeitumgebung eines JDK verwendet wird. Aktuelle Version: Die aktuelle Version ist vom 23. Filius 2.6 (Windows/Ubuntu/Zip) Die letzte Version mit uneingeschränkter Kompatibilität für selbstprogrammierte Anwendungen: Filius 1.14 (Windows/Ubuntu/Zip) Das Windows-Installationsprogramm ist signiert durch SignPath Foundation. Hinweise zu den Änderungen finden Sie in den Versionshinweisen. Sebastian Broers hat ein Installationspaket für die Nutzung unter MacOS erstellt, das er zur Nutzung bereit stellt. Filius für MacOS (extern) Quelltexte
National Cryptologic Museum
The National Cryptologic Museum is the National Security Agency's principal gateway to the public. It shares the Nation's, as well as NSA's, cryptologic legacy and place in world history. Located adjacent to NSA Headquarters, Ft. George G. Originally designed to house artifacts from the Agency and to give employees a place to reflect on past successes and failures, the Museum quickly developed into a priceless collection of the Nation's cryptologic history. Being the first and only public museum in the Intelligence Community, the Museum hosts approximately 50,000 visitors annually from all over the country and all over the world, allowing them a peek into the secret world of codemaking and codebreaking. The Museum is also an invaluable educational tool, benefiting thousands of students and teachers every year. The Museum has been featured in a plethora of international TV, print, and radio media and has hosted visitors and dignitaries from around the world.
WW II Codes and Ciphers
