Improved Proxy Re-encryption Scheme for Symmetric Key Cryptography

Amril Syalim; Takashi Nishide; Kouichi Sakurai

Paper 2021/276

Improved Proxy Re-encryption Scheme for Symmetric Key Cryptography

Amril Syalim, Takashi Nishide, and Kouichi Sakurai

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: Published elsewhere. IEEE IWBIS 2017
DOI: 10.1109/IWBIS.2017.8275110
Keywords: proxy re-encryption
Contact author(s): amril syalim @ cs ui ac id
History: 2021-03-04: received
Short URL: https://ia.cr/2021/276
License: CC BY

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},
      doi = {10.1109/IWBIS.2017.8275110},
      url = {https://eprint.iacr.org/2021/276}
}