Paper 2022/1702 Original: eprint.iacr.org/2022/1702 ↗
SCB Mode: Semantically Secure Length-Preserving Encryption
Abstract
To achieve semantic security, symmetric encryption schemes classically require ciphertext expansion. In this paper we provide a means to achieve semantic security while preserving the length of messages at the cost of mildly sacrificing correctness. Concretely, we propose a new scheme that can be interpreted as a secure alternative to (or wrapper around) plain Electronic Codebook (ECB) mode of encryption, and for this reason we name it Secure Codebook (SCB). Our scheme is the first length-preserving encryption scheme to effectively achieve semantic security.
Metadata
- Available format(s)
PDF- Category
- Secret-key cryptography
- Publication info
- Preprint.
- History
- 2022-12-08: last updated
- 2022-12-08: published
- Short URL
- https://ia.cr/2022/1702
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2022/1702,
author = {Fabio Banfi},
title = {SCB Mode: Semantically Secure Length-Preserving Encryption},
howpublished = {Cryptology {ePrint} Archive, Paper 2022/1702},
year = {2022},
url = {https://eprint.iacr.org/2022/1702}
}