SCB Mode: Semantically Secure Length-Preserving Encryption
DOI:
https://doi.org/10.46586/tosc.v2022.i4.1-23Keywords:
SCB, secure codebook, semantic security, length-preserving encryptionAbstract
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.
Published
2022-12-07
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Section
Articles
License
Copyright (c) 2022 Fabio Banfi
This work is licensed under a Creative Commons Attribution 4.0 International License.
How to Cite
SCB Mode: Semantically Secure Length-Preserving Encryption. (2022). IACR Transactions on Symmetric Cryptology, 2022(4), 1-23. https://doi.org/10.46586/tosc.v2022.i4.1-23