IND-CCA secure encryption based on a Zheng–Seberry scheme

In 1993, Zheng and Seberry proposed three methods for strengthening public key cryptosystems. These methods aimed to obtain schemes that are secure against adaptively chosen ciphertext attacks. One method was improving security by using digital signatures. Zheng and Seberry gave an example scheme th...

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Bibliographic Details
Published in:Journal of computational and applied mathematics 2014-03, Vol.259, p.529-535
Main Authors: Ak, Murat, Hanoymak, Turgut, Selçuk, Ali Aydın
Format: Article
Language:English
Subjects:
Provable security
Public key cryptography
Random oracle model
Schnorr signature
Zheng–Seberry encryption scheme
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Summary:In 1993, Zheng and Seberry proposed three methods for strengthening public key cryptosystems. These methods aimed to obtain schemes that are secure against adaptively chosen ciphertext attacks. One method was improving security by using digital signatures. Zheng and Seberry gave an example scheme that employs this method. However, they were not able to prove IND-CCA security of their cryptosystem. In this paper, we modify this cryptosystem by employing a Schnorr signature scheme and prove this new scheme to be IND-CCA secure in the random oracle model.
ISSN:0377-0427
1879-1778
DOI:10.1016/j.cam.2013.06.042