ZMAC: A Fast Tweakable Block Cipher Mode for Highly Secure Message Authentication

@article{Iwata2017ZMACAF,
  title={ZMAC: A Fast Tweakable Block Cipher Mode for Highly Secure Message Authentication},
  author={Tetsu Iwata and Kazuhiko Minematsu and Thomas Peyrin and Yannick Seurin},
  journal={IACR Cryptology ePrint Archive},
  year={2017},
  volume={2017},
  pages={535}
}
We propose a new mode of operation called ZMAC allowing to construct a (stateless and deterministic) message authentication code (MAC) from a tweakable block cipher (TBC). When using a TBC with n-bit blocks and t-bit tweaks, our construction provides security (as a variable-input-length PRF) beyond the birthday bound with respect to the block-length n and allows to process n + t bits of inputs per TBC call. In comparison, previous TBC-based modes such as PMAC1, the TBC-based generalization of… CONTINUE READING

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