2017-12-03
Full-state keyed duplex with built-in multi-user support
Publication
Publication
The keyed duplex construction was introduced by Bertoni et al. (SAC 2011) and recently generalized to full-state absorption by Mennink et al. (ASIACRYPT 2015). We present a generalization of the full-state keyed duplex that natively supports multiple instances by design, and perform a security analysis that improves over that of Mennink et al. in terms of a more modular security analysis and a stronger and more adaptive security bound. Via the introduction of an additional parameter to the analysis, our bound demonstrates a significant security improvement in case of nonce-respecting adversaries. Furthermore, by supporting multiple instances by design, instead of adapting the security model to it, we manage to derive a security bound that is largely independent of the number of instances.
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| , , , | |
| STMicroelectronics, Belgium | |
| doi.org/10.1007/978-3-319-70697-9_21 | |
| International Conference on the Theory and Application of Cryptology and Information Security | |
| Organisation | Centrum Wiskunde & Informatica, Amsterdam (CWI), The Netherlands |
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Daemen, J., Mennink, B., & Van Assche, G. (2017). Full-state keyed duplex with built-in multi-user support. In Lecture Notes in Computer Science/Lecture Notes in Artificial Intelligence (pp. 606–637). doi:10.1007/978-3-319-70697-9_21 |
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