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Certificateless Encryption Scheme Secure in Standard Model |
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| Authors: | ZHANG Guoyan WANG Xiaoyun . School of Computer Science Technology Sh ong University Jinan China . Key Laboratory of Cryptologic Technology Information Security of the Ministry of Education . Center for Advanced Study Tsinghua University Beijing |
| Affiliation: | aSchool of Computer Science and Technology, Shandong University, Jinan 250100, China;bKey Laboratory of Cryptologic Technology and Information Security of the Ministry of Education, Shandong University, Jinan 250100, China;cCenter for Advanced Study, Tsinghua University, Beijing 100084, China |
| Abstract: | The scheme introduced by Hwang and Liu in 2008 is shown to be insecure against the key replacement attack. A more practical attack model is introduced, and according to this model, an efficient certificateless encryption scheme is presented which is IND-CCA secure against both Type I and Type II attackers without random oracle. This encryption scheme can defend against the malicious key generation center attack, and can reach Girault's trusted level 3 as in traditional public key infrastructure-based cryptography. This certificateless encryption scheme has a shorter public key than other schemes in the standard model. |
| Keywords: | certificateless cryptography malicious key generation center key replacement attack IND-CCA secure |
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