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If you wish to be informed about our seminars by email,
please contact Iwen Coisel or François-Xavier Standaert .
Seminars for the year 2000
November 2000
November 08, 14:30 - Rijndael and the AES (Advanced Encryption Standard)
by Vincent Rijmen
| Date: | November 08, 2000 - 14:30 |
| Location: | Unspecified location |
| Abstract: | In 1997, the American National Institute of Standards and Technology (NIST) has initiated an open competition to replace the famous cryptographic algorithm DES. Twenty-one teams of cryptographers from 11 countries submitted candidates. After an evaluation process of 2.5 years, Rijndael has been selected as the winner on October 2nd. We explain the use and importance of the AES and give an overview of the most important contenders and events in the AES selection process. We describe the design strategy of Rijndael, and compare it to the design principles of the other finalists. We highlight the key advantages of Rijndael, which have lead to its selection. Rijndael has been designed by Vincent Rijmen (COSIC, Dept. Electrical Engineering-ESAT, K.U.Leuven) and Joan Daemen (ProtonWorld International).
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November 24, 10:00 - Autour du crypto-système de Mc Eliece
by Thierry Berger
| Date: | November 24, 2000 - 10:00 |
| Location: | Unspecified location |
| Abstract: | Les protocoles cryptographiques utilisant les codes correcteurs restent la principales alternative aux méthodes de type RSA ou logarithme discret. Nous rappellerons le fonctionnement du système de Mac Eliece, puis de sa variante proposée par Niederreiter.
Ces protocoles sont très rapides par rapport au système RSA. Leurs principaux défauts sont d'une part une place mémoire importante et d'autre part une expansion du clair qui empêche leur utilisation en signature.
Nous présenterons deux directions de recherche pour améliorer la place mémoire et le rendement. La première a été introduite par E. Gabidulin et consiste à utiliser la métrique "rang" à la place de la métrique de Hamming. La deuxième prolonge les travaux de E. Krouk et consiste à construire un "ensemble d'erreurs corrigibles" qui ne sont plus en relation directe avec la métrique de Hamming. Malheureusement, ces améliorations ne permettent toujours pas d'utiliser un tel système pour la signature.
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November 24, 11:00 - Cryptographic Techniques for Digital Rights Management
by Stuart Haber
| Date: | November 24, 2000 - 11:00 |
| Location: | Unspecified location |
| Abstract: | The newly widespread availability of information in digital form raises a number of interesting questions about how to design a system for commercial transactions giving consumers access to the information. In the pre-digital world, intellectual-property regulations governed (and govern) many aspects of access to information; it remains to be seen how this will transfer to the digital world. After discussing the requirements that one might desire of a system for commerce in digital intellectual property, the speaker will describe one such system, that of InterTrust Technologies.
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