Welcome to the resource topic for 2017/867
Title:
On the security of a Certificateless Proxy Re-Encryption Scheme without Pairing
Authors: Arinjita Paul, S. Sharmila Deva Selvi, C. Pandu Rangan
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.
ePrint: https://eprint.iacr.org/2017/867
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