Paper 2000/039 Original: eprint.iacr.org/2000/039 ↗
Encryption Modes with Almost Free Message Integrity
Abstract
We define a new mode of operation for block ciphers which in addition to providing confidentiality also ensures message integrity. In contrast, previously for message integrity a separate pass was required to compute a cryptographic message authentication code (MAC). The new mode of operation, called Integrity Aware Parallelizable Mode (IAPM), requires a total of m+1 block cipher evaluations on a plain-text of length m blocks. For comparison, the well known CBC (cipher block chaining) encryption mode requires m block cipher evaluations, and the second pass of computing the CBC-MAC essentially requires additional m+1 block cipher evaluations. As the name suggests, the new mode is also highly parallelizable.
Metadata
- Available format(s)
PDF- Category
- Secret-key cryptography
- Publication info
- Preprint.
- History
- 2018-04-08: last updated
- 2000-08-01: published
- Short URL
- https://ia.cr/2000/039
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2000/039,
author = {Charanjit S. Jutla},
title = {Encryption Modes with Almost Free Message Integrity},
howpublished = {Cryptology {ePrint} Archive, Paper 2000/039},
year = {2000},
url = {https://eprint.iacr.org/2000/039}
}