Abstract / Description of output
In synchronous networks, protocols can achieve security guarantees that are not possible in an asynchronous world: they can simultaneously achieve input completeness (all honest parties' inputs are included in the computation) and guaranteed termination (honest parties do not "hang" indefinitely). In practice truly synchronous networks rarely exist, but synchrony can be emulated if channels have (known) bounded latency and parties have loosely synchronized clocks. The widely-used framework of universal composability (UC) is inherently asynchronous, but several approaches for adding synchrony to the framework have been proposed. However, we show that the existing proposals do not provide the expected guarantees. Given this, we propose a novel approach to defining synchrony in the UC framework by introducing functionalities exactly meant to model, respectively, bounded-delay networks and loosely synchronized clocks. We show that the expected guarantees of synchronous computation can be achieved given these functionalities, and that previous similar models can all be expressed within our new framework.
Original language | English |
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Title of host publication | Theory of Cryptography |
Subtitle of host publication | 10th Theory of Cryptography Conference, TCC 2013, Proceedings |
Place of Publication | Berlin, Heidelberg |
Publisher | Springer |
Pages | 477-498 |
Number of pages | 22 |
ISBN (Electronic) | 978-3-642-36594-2 |
ISBN (Print) | 978-3-642-36593-5 |
DOIs | |
Publication status | Published - 21 Feb 2013 |
Event | 10th Theory of Cryptography Conference - Tokyo, Japan Duration: 3 Mar 2013 → 6 Mar 2013 https://www.iacr.org/workshops/tcc2013/ |
Publication series
Name | Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) |
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Publisher | Springer, Berlin, Heidelberg |
Volume | 7785 |
ISSN (Print) | 0302-9743 |
ISSN (Electronic) | 1611-3349 |
Conference
Conference | 10th Theory of Cryptography Conference |
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Abbreviated title | TCC 2013 |
Country/Territory | Japan |
City | Tokyo |
Period | 3/03/13 → 6/03/13 |
Internet address |