Design and analysis of certificate-free undeniable signature schemes
The main focus of this thesis is on the design and analysis of undeniable signature schemes in certificate-free settings, namely, identity-based setting and certificateless setting. Undeniable signature is a special type of digital signatures which is not universally verifiable. Identity-based cryptogr...
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2013
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my-mmu-ep.54452014-04-22T07:13:24Z Design and analysis of certificate-free undeniable signature schemes 2013-04 Behna, Rouzbeh QA76.75-76.765 Computer software The main focus of this thesis is on the design and analysis of undeniable signature schemes in certificate-free settings, namely, identity-based setting and certificateless setting. Undeniable signature is a special type of digital signatures which is not universally verifiable. Identity-based cryptography overcomes the costly issues in traditional public key cryptography by computing the users’ public keys directly from their publicly available information. However, identity-based systems suffer from an inherent private key escrow problem. Certificateless cryptography was later proposed to bridge between identity-based cryptography and traditional public key cryptography by eliminating the use of certificates while addressing the private key escrow problem at the same time. Firstly, two attacks are mounted on an efficient identity-based undeniable signature scheme. A provably secure and efficient identity-based undeniable signature scheme with short signature is then proposed. Secondly, cryptanalysis is presented on a newly proposed efficient certificateless undeniable signature scheme. More precisely, security flaws are found on the invisibility and non-impersonation properties of the scheme. A revised scheme is then proffered which tackles both of the attacks while enjoys from an equally efficient Sign algorithm. Independently, a provably secure certificateless undeniable signature scheme which is more efficient than the only existing scheme that is secure in the strong security model is proposed. Lastly, in our effort in proposing certificateless undeniable signature schemes with additional features, the security model of convertible certificateless undeniable signature schemes is formally defined and an instance of such schemes is presented for the first time. 2013-04 Thesis http://shdl.mmu.edu.my/5445/ http://library.mmu.edu.my/diglib/onlinedb/dig_lib.php masters Multimedia University Faculty of Information Science and Technology |
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Multimedia University |
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MMU Institutional Repository |
| topic |
QA76.75-76.765 Computer software |
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QA76.75-76.765 Computer software Behna, Rouzbeh Design and analysis of certificate-free undeniable signature schemes |
| description |
The main focus of this thesis is on the design and analysis of undeniable signature schemes in certificate-free settings, namely, identity-based setting and certificateless setting. Undeniable signature is a special type of digital signatures which is not universally verifiable. Identity-based cryptography overcomes the costly issues in traditional public key cryptography by computing the users’ public keys directly from their publicly available information. However, identity-based systems suffer from an inherent private
key escrow problem. Certificateless cryptography was later proposed to bridge between identity-based cryptography and traditional public key cryptography by eliminating the use of certificates while addressing the private key escrow problem at the same time. Firstly, two attacks are mounted on an efficient identity-based undeniable signature scheme. A provably secure and efficient identity-based undeniable signature scheme with short signature is then proposed. Secondly, cryptanalysis is presented on a newly proposed efficient certificateless undeniable signature scheme. More precisely, security flaws are found on the
invisibility and non-impersonation properties of the scheme. A revised scheme is then proffered which tackles both of the attacks while enjoys from an equally efficient Sign algorithm. Independently, a provably secure certificateless undeniable signature scheme which is more efficient than the only existing scheme that is secure in the strong security model is proposed. Lastly, in our effort in proposing certificateless undeniable signature schemes with additional features, the security model of convertible certificateless undeniable signature schemes is formally defined and an instance of such schemes is presented for the first time. |
| format |
Thesis |
| qualification_level |
Master's degree |
| author |
Behna, Rouzbeh |
| author_facet |
Behna, Rouzbeh |
| author_sort |
Behna, Rouzbeh |
| title |
Design and analysis of certificate-free undeniable signature schemes |
| title_short |
Design and analysis of certificate-free undeniable signature schemes |
| title_full |
Design and analysis of certificate-free undeniable signature schemes |
| title_fullStr |
Design and analysis of certificate-free undeniable signature schemes |
| title_full_unstemmed |
Design and analysis of certificate-free undeniable signature schemes |
| title_sort |
design and analysis of certificate-free undeniable signature schemes |
| granting_institution |
Multimedia University |
| granting_department |
Faculty of Information Science and Technology |
| publishDate |
2013 |
| _version_ |
1747829576297349120 |