Paper 2017/867 Original: eprint.iacr.org/2017/867 ↗
On the security of a Certificateless Proxy Re-Encryption Scheme without Pairing
Abstract
Proxy re-encryption (PRE) is a cryptographic primitive introduced by Blaze, Bleumer and Strauss to provide delegation of decryption rights. A semi-trusted proxy agent re-encrypts ciphertexts under the public key of Alice into ciphertexts under the public key of Bob, without learning anything about the underlying message. In IWSEC 2017, Kuchta et al. presented a pairing-free certificateless proxy re-encryption scheme, and claimed that their scheme is the first to provide the certificateless property without resorting to pairing. They proved their construction is CCA-secure in the random oracle model, under the Computational Diffie-Hellman assumption. In this work, we show that the recently proposed construction of Kuchta et al. is vulnerable to several attacks.
Metadata
- Available format(s)
PDF- Category
- Public-key cryptography
- Publication info
- Preprint.
- History
- 2019-11-22: last updated
- 2017-09-13: published
- Short URL
- https://ia.cr/2017/867
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2017/867,
author = {Arinjita Paul and S. Sharmila Deva Selvi and C. Pandu Rangan},
title = {On the security of a Certificateless Proxy Re-Encryption Scheme without Pairing},
howpublished = {Cryptology {ePrint} Archive, Paper 2017/867},
year = {2017},
url = {https://eprint.iacr.org/2017/867}
}