The Oracle Diffie-Hellman Assumptions and an Analysis of DHIES
CT-RSA 2001 Proceedings of the 2001 Conference on Topics in Cryptology: The Cryptographer's Track at RSA
Identity-Based Encryption from the Weil Pairing
CRYPTO '01 Proceedings of the 21st Annual International Cryptology Conference on Advances in Cryptology
Digital Signcryption or How to Achieve Cost(Signature & Encryption)
CRYPTO '97 Proceedings of the 17th Annual International Cryptology Conference on Advances in Cryptology
Collision-Resistant Hashing: Towards Making UOWHFs Practical
CRYPTO '97 Proceedings of the 17th Annual International Cryptology Conference on Advances in Cryptology
On the (In)security of the Fiat-Shamir Paradigm
FOCS '03 Proceedings of the 44th Annual IEEE Symposium on Foundations of Computer Science
Efficient Identity Based Signature/Signcryption Scheme in the Standard Model
ISDPE '07 Proceedings of the The First International Symposium on Data, Privacy, and E-Commerce
Efficient Secret Authenticatable Anonymous Signcryption Scheme with Identity Privacy
PAISI, PACCF and SOCO '08 Proceedings of the IEEE ISI 2008 PAISI, PACCF, and SOCO international workshops on Intelligence and Security Informatics
Discrete Applied Mathematics
Identity based signcryption scheme without random oracles
Computer Standards & Interfaces
A Novel ID-Based Anonymous Signcryption Scheme
APWeb/WAIM '09 Proceedings of the Joint International Conferences on Advances in Data and Web Management
Direct chosen-ciphertext secure identity-based key encapsulation without random oracles
Theoretical Computer Science
An improved semantically-secure identity-based signcryption scheme in the standard model
Computers and Electrical Engineering
CCA2 secure IBE: standard model efficiency through authenticated symmetric encryption
CT-RSA'08 Proceedings of the 2008 The Cryptopgraphers' Track at the RSA conference on Topics in cryptology
Threshold attribute-based signcryption
SCN'10 Proceedings of the 7th international conference on Security and cryptography for networks
Cryptanalysis of Efficient Identity Based Signature/Signcryption Schemes in the Standard Model
IPTC '10 Proceedings of the 2010 International Symposium on Intelligence Information Processing and Trusted Computing
Efficient and provably-secure identity-based signatures and signcryption from bilinear maps
ASIACRYPT'05 Proceedings of the 11th international conference on Theory and Application of Cryptology and Information Security
Improved identity-based signcryption
PKC'05 Proceedings of the 8th international conference on Theory and Practice in Public Key Cryptography
Fast and proven secure blind identity-based signcryption from pairings
CT-RSA'05 Proceedings of the 2005 international conference on Topics in Cryptology
Efficient identity-based encryption without random oracles
EUROCRYPT'05 Proceedings of the 24th annual international conference on Theory and Applications of Cryptographic Techniques
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In this paper, we propose a new Identity-based signcryption (IBSC) scheme in the standard model. Our scheme shows an improvement of approximately 40% reduction in the ciphertext size when compared to the previously proposed IBSC schemes in the standard model. Further, we argue that the previous IBSC schemes do not provide sufficient simulation ability in the security game. We show that with some minor overhead, we are able to correct this. The security reduction of our scheme is based on the hardness of the hashed modified decision bilinear Diffie-Hellman problem and the modified computational Diffie-Hellman problem.