Paper 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)
- Category
- Secret-key cryptography
- Publication info
- Published by the IACR in TOSC 2022
- DOI
- 10.46586/tosc.v2022.i4.1-23
- Keywords
- SCB secure codebook semantic security length-preserving encryption
- Contact author(s)
- fabio banfi @ inf ethz ch
- History
- 2022-12-10: approved
- 2022-12-08: received
- See all versions
- Short URL
- https://ia.cr/2022/1702
- License
-
CC BY
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}, doi = {10.46586/tosc.v2022.i4.1-23}, url = {https://eprint.iacr.org/2022/1702} }