Paper 2016/1090

OleF: An Inverse-Free Online Cipher

Ritam Bhaumik and Mridul Nandi

Abstract

Online ciphers, in spite of being insecure against an sprp adversary, can be desirable at places because of their ease of implementation and speed. Here we propose a single-keyed inverse-free construction that achieves online sprp security with an optimal number of blockcipher calls. We also include a partial block construction, without requiring any extra key.

Note: There were some late changes to the Camera-Ready version. This is the preprint of the final submitted version.

Metadata
Available format(s)
PDF
Category
Secret-key cryptography
Publication info
Published by the IACR in FSE 2017
Keywords
OleFonline cipherblockcipherinverse-freediblock
Contact author(s)
bhaumik ritam @ gmail com
History
2016-11-29: last of 2 revisions
2016-11-22: received
See all versions
Short URL
https://ia.cr/2016/1090
License
Creative Commons Attribution
CC BY

BibTeX

@misc{cryptoeprint:2016/1090,
      author = {Ritam Bhaumik and Mridul Nandi},
      title = {OleF: An Inverse-Free Online Cipher},
      howpublished = {Cryptology ePrint Archive, Paper 2016/1090},
      year = {2016},
      note = {\url{https://eprint.iacr.org/2016/1090}},
      url = {https://eprint.iacr.org/2016/1090}
}
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