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Tweakable Blockciphers for Efficient Authenticated Encryptions with Beyond the Birthday-Bound Security
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| Abstract: | Modular design via a tweakable blockcipher (TBC) offers efficient authenticated encryption (AE) schemes (with associated data) that call a blockcipher once for each data block (of associated data or a plaintext). However, the existing efficient blockcipher-based TBCs are secure up to the birthday bound, where the underlying keyed blockcipher is a secure strong pseudorandom permutation. Existing blockcipher-based AE schemes with beyond-birthday-bound (BBB) security are not efficient, that is, a blockcipher is called twice or more for each data block. In this paper, we present a TBC, XKX, that offers efficient blockcipher-based AE schemes with BBB security, by combining with efficient TBC-based AE schemes such as ΘCB3 and |
BibTeX
@article{tosc-2017-28485,
title={Tweakable Blockciphers for Efficient Authenticated Encryptions with Beyond the Birthday-Bound Security},
journal={IACR Trans. Symmetric Cryptol.},
publisher={Ruhr-Universität Bochum},
volume={2017, Issue 2},
pages={1-26},
url={https://tosc.iacr.org/index.php/ToSC/article/view/636},
doi={10.13154/tosc.v2017.i2.1-26},
author={Yusuke Naito},
year=2017
}