How to construct efficient signcryption schemes on elliptic curves
Information Processing Letters
New Signcryption Schemes Based on KCDSA
ICISC '01 Proceedings of the 4th International Conference Seoul on Information Security and Cryptology
Digital Signcryption or How to Achieve Cost(Signature & Encryption)
CRYPTO '97 Proceedings of the 17th Annual International Cryptology Conference on Advances in Cryptology
A Practical Public Key Cryptosystem Provably Secure Against Adaptive Chosen Ciphertext Attack
CRYPTO '98 Proceedings of the 18th Annual International Cryptology Conference on Advances in Cryptology
Signcryption and Its Applications in Efficient Public Key Solutions
ISW '97 Proceedings of the First International Workshop on Information Security
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
Security proofs for signature schemes
EUROCRYPT'96 Proceedings of the 15th annual international conference on Theory and application of cryptographic techniques
Efficient short signcryption scheme with public verifiability
Inscrypt'06 Proceedings of the Second SKLOIS conference on Information Security and Cryptology
An efficient certificateless signature scheme
CIS'05 Proceedings of the 2005 international conference on Computational Intelligence and Security - Volume Part II
On the security of certificateless signature schemes from asiacrypt 2003
CANS'05 Proceedings of the 4th international conference on Cryptology and Network Security
An efficient certificateless signature scheme
EUC'06 Proceedings of the 2006 international conference on Emerging Directions in Embedded and Ubiquitous Computing
Improved signcryption from q-Diffie-Hellman problems
SCN'04 Proceedings of the 4th international conference on Security in Communication Networks
Key replacement attack against a generic construction of certificateless signature
ACISP'06 Proceedings of the 11th Australasian conference on Information Security and Privacy
Security analysis of the certificateless signature scheme proposed at SecUbiq 2006
EUC'07 Proceedings of the 2007 conference on Emerging direction in embedded and ubiquitous computing
An efficient RSA-based certificateless signature scheme
Journal of Systems and Software
Certificate-based signcryption with enhanced security features
Computers & Mathematics with Applications
Cryptanalysis and improvement of a certificateless threshold signature secure in the standard model
Information Sciences: an International Journal
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Unforgeabilty is a primitive property of a secure digital signature. As two extensions of digital signature, signcryption and certificateles signature play an important role in the sensitive transmission. In this work, we analyze the security of two signature schemes, one is the certificateless signature scheme[17] which was proposed by Gorantla et al in CIS 2005, the other is an efficient short signcryption scheme[8] which was proposed by Ma et al in Inscrypto 2006. Then, we show that the two schemes were insecure. In Ma et al's scheme, if the recipient is dishonest, then he can produce any forgery on an arbitrary message and convince the trusted third party that the forgeable signcrytion comes from the signer. While, in Gorantla et al's scheme, any one can forge a signature on an arbitrary message in the name of the others. Finally, we give the corresponding improved scheme, respectively.