security is the discipline of preventing unauthorized interceptors from accessing telecommunications in an intelligible form, while still delivering content to the intended recipients.
In the North Atlantic Treaty Organization culture, including United States Department of Defense culture, it is often referred to by the abbreviation COMSEC. The field includes cryptographic security, transmission security, emissions security and physical security of COMSEC equipment and associated keying material.
COMSEC is used to protect both classified and unclassified traffic on military communications networks, including voice, video, and data. It is used for both analog and digital applications, and both wired and wireless links.
Voice over secure internet protocol VOSIP has become the de facto standard for securing voice communication, replacing the need for Secure Terminal Equipment (STE) in much of NATO, including the U.S.A. USCENTCOM moved entirely to VOSIP in 2008.
Cryptographic security: The component of communications security that results from the provision of technically sound cryptosystems and their proper use. This includes ensuring message confidentiality and authenticity.
Emission security (EMSEC): The protection resulting from all measures taken to deny unauthorized persons information of value that might be derived from communications systems and cryptographic equipment intercepts and the interception and analysis of compromising emanations from cryptographic—equipment, information systems, and telecommunications systems.
Transmission security (TRANSEC): The component of communications security that results from the application of measures designed to protect transmissions from interception and exploitation by means other than cryptanalysis (e.g. frequency hopping and spread spectrum).
Physical security: The component of communications security that results from all physical measures necessary to safeguard classified equipment, material, and documents from access thereto or observation thereof by unauthorized persons.
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This course introduces the basics of cryptography. We review several types of cryptographic primitives, when it is safe to use them and how to select the appropriate security parameters. We detail how
This course reviews some failure cases in public-key cryptography. It introduces some cryptanalysis techniques. It also presents fundamentals in cryptography such as interactive proofs. Finally, it pr
thumb|La machine de Lorenz utilisée par les nazis durant la Seconde Guerre mondiale pour chiffrer les communications militaires de haut niveau entre Berlin et les quartiers-généraux des différentes armées. La cryptographie est une des disciplines de la cryptologie s'attachant à protéger des messages (assurant confidentialité, authenticité et intégrité) en s'aidant souvent de secrets ou clés. Elle se distingue de la stéganographie qui fait passer inaperçu un message dans un autre message alors que la cryptographie rend un message supposément inintelligible à autre que qui de droit.
La Transport Layer Security (TLS) ou « Sécurité de la couche de transport », et son prédécesseur la Secure Sockets Layer (SSL) ou « Couche de sockets sécurisée », sont des protocoles de sécurisation des échanges par réseau informatique, notamment par Internet. Le protocole SSL a été développé à l'origine par Netscape Communications Corporation pour son navigateur Web. L'organisme de normalisation Internet Engineering Task Force (IETF) en a poursuivi le développement en le rebaptisant Transport Layer Security (TLS).
security is the discipline of preventing unauthorized interceptors from accessing telecommunications in an intelligible form, while still delivering content to the intended recipients. In the North Atlantic Treaty Organization culture, including United States Department of Defense culture, it is often referred to by the abbreviation COMSEC. The field includes cryptographic security, transmission security, emissions security and physical security of COMSEC equipment and associated keying material.
Explore la mise en œuvre pratique de protocoles de sécurité utilisant le passeport biométrique comme étude de cas, couvrant les vulnérabilités, l'évolution TLS et le cryptage ChaChaPoly.
Explore la génération de nombres quantiques aléatoires, en discutant des défis et des implémentations de générer une bonne randomité à l'aide de dispositifs quantiques.
Shannon, in his landmark 1948 paper, developed a framework for characterizing the fundamental limits of information transmission. Among other results, he showed that reliable communication over a chan