946 resultados para Key Agreement Protocol


Proposal for a Council Decision concerning the conclusion on behalf of the European Economic Community of the supplementary protocol between the European Economic Community and the European Coal and Steel Community of the one part and the Czech Republic of the other part to the interim agreement on trade and trade related matters between the European Economic Community and the European Coal and Steel Community of the one part and the Czech and Slovak Federal Republic of the other part. Proposal for a Council Decision concerning the conclusion on behalf of the European Economic Community of the supplementary protocol between the European Economic Community and the European Coal and Steel Community of the one part and the Slovak Republic of the other part to the interim agreement on trade and trade related matters between the European Economic Community and the European Coal and Steel Community of the one part and the Czech and Slovak Federal Republic of the other part. Request for Council assent and consultation of the ECSC Committee pursuant to Article 95 of the ECSC Treaty, concerning a draft Commission Decision concerning the conclusion on behalf of the European Coal and Steel Community of the supplementary protocol between the European Economic Community and the European Coal and Steel Community of the one part and the Czech Republic of the other part to the interim agreement on trade and trade related matters between the European Economic Community and the European Coal and Steel Community of the one part and the Czech and Slovak Federal Republic of the other part. Request for Council assent and consultation of the ECSC Committee, pursuant to Article 95 of the ECSC Treaty, concerning a draft Commission Decision concerning the conclusion on behalf of the European Coal and Steel Community of the supplementary protocol between the European Economic Community and the European Coal and Steel Community of the one part and the Slovak Republic of the other part to the interim agreement on trade and trade related matters between the European Economic Community and the European Coal and Steel Community of the other party and the Czech and Slovak Federal Republic of the other part. SEC (93) 1479 final, 30 September 1993

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We propose two public-key schemes to achieve “deniable authentication” for the Internet Key Exchange (IKE). Our protocols can be implemented using different concrete mechanisms and we discuss different options; in particular we suggest solutions based on elliptic curve pairings. The protocol designs use the modular construction method of Canetti and Krawczyk which provides the basis for a proof of security. Our schemes can, in some situations, be more efficient than existing IKE protocols as well as having stronger deniability properties.

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We treat the security of group key exchange (GKE) in the universal composability (UC) framework. Analyzing GKE protocols in the UC framework naturally addresses attacks by malicious insiders. We define an ideal functionality for GKE that captures contributiveness in addition to other desired security goals. We show that an efficient two-round protocol securely realizes the proposed functionality in the random oracle model. As a result, we obtain the most efficient UC-secure contributory GKE protocol known.