Implicit and Explicit Certificates-Based Encryption Scheme

Abstract : Certificate-based encryption (CBE) combines traditional public-key encryption and certificateless encryption. However, it does suffer to the Denial of Decryption (DoD) attack called by Liu and Au. To capture this attack, they introduced a new paradigm called self-generated-certificate public key cryptography. In this paper we show that the problem of DoD attack can be solved with a new implicit and explicit certificates-based public key cryptography paradigm. More importantly, we propose a concrete implicit and explicit certificate-based encryption (IE-CBE) scheme that defends against DoD attack. This new scheme is enhanced version of CBE scheme and preserves all its advantages, i.e., every user is given by the trusted authority an implicit certificate as a part of a private key and generates his own secret key and corresponding public key. In addition, in the IE-CBE scheme trusted authority has to generate an explicit certificate for a user with some identity and a public key. We prove that our scheme is IND-CCA2− and DoD-Free secure in the random oracle model as hard is to solve p-BDHI and k-CCA problems.
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Communication dans un congrès
Khalid Saeed; Václav Snášel. 13th IFIP International Conference on Computer Information Systems and Industrial Management (CISIM), Nov 2014, Ho Chi Minh City, Vietnam. Springer, Lecture Notes in Computer Science, LNCS-8838, pp.651-666, 2014, Computer Information Systems and Industrial Management. 〈10.1007/978-3-662-45237-0_59〉
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Tomasz Hyla, Witold Maćków, Jerzy Pejaś. Implicit and Explicit Certificates-Based Encryption Scheme. Khalid Saeed; Václav Snášel. 13th IFIP International Conference on Computer Information Systems and Industrial Management (CISIM), Nov 2014, Ho Chi Minh City, Vietnam. Springer, Lecture Notes in Computer Science, LNCS-8838, pp.651-666, 2014, Computer Information Systems and Industrial Management. 〈10.1007/978-3-662-45237-0_59〉. 〈hal-01405660〉

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