Birgit Baum-Waidner

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Optimistic asynchronous multi-party contract signing protocols have received attention in recent years as a compromise between efficient protocols and protocols avoiding a third party as a bottleneck of security. " Optimistic " roughly means: in case all participants are honest and receive the messages from the other participants as expected, the third(More)
We present a protocol which achieves Byzantine Agreement (BA) if less than half of the processors are faulty and which does not rely on unproved computational assumptions such as the unforgeability of digital signatures. This is the first protocol which achieves this level of security. Our protocol needs reliable broadcast and secret channels in a(More)
Disclaimer: Some of systems mentioned in this book may be protected by trademarks, copyrights, or patents. They are the property of their owners. Foreword Some years ago, businesses could choose whether to migrate to electronic commerce, however, today it seems they have no choice. Predictions indicate that companies that do not make the necessary changes(More)
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