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CISC
2009
Springer

Cryptanalysis of Certificateless Signcryption Schemes and an Efficient Construction without Pairing

8 years 1 months ago
Cryptanalysis of Certificateless Signcryption Schemes and an Efficient Construction without Pairing
Abstract. Certificateless cryptography introduced by Al-Riyami and Paterson eliminates the key escrow problem inherent in identity based cryptosystems. Even though building practical identity based signcryption schemes without bilinear pairing are considered to be almost impossible, it will be interesting to explore possibilities of constructing such systems in other settings like certificateless cryptography. Often for practical systems, bilinear pairings are considered to induce computational overhead. Signcryption is a powerful primitive that offers both confidentiality and authenticity to noteworthy messages. Though some prior attempts were made for designing certificateless signcryption schemes, almost all the known ones have security weaknesses. Specifically, in this paper we demonstrate the security weakness of the schemes in [4], [2] and [14]. We also present the first provably secure certificateless signcryption scheme without bilinear pairing and prove it in the random oracle...
S. Sharmila Deva Selvi, S. Sree Vivek, C. Pandu Ra
Added 16 Feb 2011
Updated 16 Feb 2011
Type Journal
Year 2009
Where CISC
Authors S. Sharmila Deva Selvi, S. Sree Vivek, C. Pandu Rangan
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