Paper 2001/015
An observation regarding Jutla's modes of operation
Shai Halevi
Abstract
Recently, Jutla suggested two new modes of operation for block ciphers. These modes build on traditional CBC and ECB modes, respectively, but add to them masking of the outputs and inputs. Jutla proved that these masking operations considerably strengthen CBC and ECB modes. In particular, together with a simple checksum, the modified modes ensure not only confidentiality, but also authenticity. Similar modes were also suggested by Gligor and Donsecu and by Rogaway. In Jutla's proposal (as well as in some of the other proposals), the masks themselves are derived from an IV via the same block cipher as used for the encryption (perhaps with a different key). In this work we note, however, that the function for deriving these masks need not be cryptographic at all. In particular, we prove that a universal hash function (a-la-Carter-Wegman) is sufficient for this purpose.
Metadata
- Available format(s)
-
PDF
PS
- Category
- Secret-key cryptography
- Publication info
- Published elsewhere. Unknown where it was published
- Keywords
- block ciphersmodes of operation
- Contact author(s)
- shaih @ watson ibm com
- History
- 2001-04-02: last of 2 revisions
- 2001-02-23: received
- See all versions
- Short URL
- https://ia.cr/2001/015
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2001/015,
author = {Shai Halevi},
title = {An observation regarding Jutla's modes of operation},
howpublished = {Cryptology ePrint Archive, Paper 2001/015},
year = {2001},
note = {\url{https://eprint.iacr.org/2001/015}},
url = {https://eprint.iacr.org/2001/015}
}
