Paper 2021/276 Original: eprint.iacr.org/2021/276 ↗
Improved Proxy Re-encryption Scheme for Symmetric Key Cryptography
Abstract
A proxy re-encryption scheme can be executed by a semi-trusted proxy, so that we can transform a ciphertext encrypted with a key to another ciphertext encrypted with different key without allowing the proxy to access the plaintext. A method to implement a secure proxy re-encryption is by first converting the plaintext to an intermediate form by using an all or nothing transform (AONT). In this paper, we describe an improved proxy re-encryption scheme for symmetric cipher by advocating the usage of a variant of the AONT function in the proxy re-encryption scheme. We show that the scheme secure under Chosen Plaintext Attack (CPA) for all possible types of attackers.
Metadata
- Available format(s)
PDF- Category
- Secret-key cryptography
- Publication info
- Preprint.
- History
- 2021-03-04: last updated
- 2021-03-04: published
- Short URL
- https://ia.cr/2021/276
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2021/276,
author = {Amril Syalim and Takashi Nishide and Kouichi Sakurai},
title = {Improved Proxy Re-encryption Scheme for Symmetric Key Cryptography},
howpublished = {Cryptology {ePrint} Archive, Paper 2021/276},
year = {2021},
url = {https://eprint.iacr.org/2021/276}
}