OleF: An Inverse-Free Online Cipher

Ritam Bhaumik; Mridul Nandi

Paper 2016/1090 Original: eprint.iacr.org/2016/1090 ↗

OleF: An Inverse-Free Online Cipher

Ritam Bhaumik

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.

Metadata

Available format(s): PDF
Category: Secret-key cryptography
Publication info: Preprint.
History: 2016-11-29: last updated; 2016-11-22: published
Short URL: https://ia.cr/2016/1090
License: https://creativecommons.org/licenses/by/4.0/

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},
      url = {https://eprint.iacr.org/2016/1090}
}