Identity-based cryptosystems and signature schemes
Proceedings of CRYPTO 84 on Advances in cryptology
A digital signature scheme secure against adaptive chosen-message attacks
SIAM Journal on Computing - Special issue on cryptography
Random oracles are practical: a paradigm for designing efficient protocols
CCS '93 Proceedings of the 1st ACM conference on Computer and communications security
New Signcryption Schemes Based on KCDSA
ICISC '01 Proceedings of the 4th International Conference Seoul on Information Security and Cryptology
Identity-Based Encryption from the Weil Pairing
CRYPTO '01 Proceedings of the 21st Annual International Cryptology Conference on Advances in Cryptology
Non-Interactive Zero-Knowledge Proof of Knowledge and Chosen Ciphertext Attack
CRYPTO '91 Proceedings of the 11th 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
On the Security of Joint Signature and Encryption
EUROCRYPT '02 Proceedings of the International Conference on the Theory and Applications of Cryptographic Techniques: Advances in Cryptology
INDOCRYPT '00 Proceedings of the First International Conference on Progress in Cryptology
Short Signatures from the Weil Pairing
ASIACRYPT '01 Proceedings of the 7th International Conference on the Theory and Application of Cryptology and Information Security: Advances in Cryptology
Key-Privacy in Public-Key Encryption
ASIACRYPT '01 Proceedings of the 7th International Conference on the Theory and Application of Cryptology and Information Security: Advances in Cryptology
A Signcryption Scheme Based on Integer Factorization
ISW '00 Proceedings of the Third International Workshop on Information Security
A Signcryption Scheme with Signature Directly Verifiable by Public Key
PKC '98 Proceedings of the First International Workshop on Practice and Theory in Public Key Cryptography: Public Key Cryptography
Encrypted Message Authentication by Firewalls
PKC '99 Proceedings of the Second International Workshop on Practice and Theory in Public Key Cryptography
Formal Proofs for the Security of Signcryption
PKC '02 Proceedings of the 5th International Workshop on Practice and Theory in Public Key Cryptosystems: Public Key Cryptography
The Decision Diffie-Hellman Problem
ANTS-III Proceedings of the Third International Symposium on Algorithmic Number Theory
On the Security of Signcryption Scheme with Key Privacy
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
Analysis of improved signcryption scheme with key privacy
Information Processing Letters
Two birds one stone: signcryption using RSA
CT-RSA'03 Proceedings of the 2003 RSA conference on The cryptographers' track
Analysis and improvement of a signcryption scheme with key privacy
ISC'05 Proceedings of the 8th international conference on Information Security
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
Signcryption from randomness recoverable public key encryption
Information Sciences: an International Journal
Efficient Constructions of Signcryption Schemes and Signcryption Composability
INDOCRYPT '09 Proceedings of the 10th International Conference on Cryptology in India: Progress in Cryptology
Secret signatures: how to achieve business privacy efficiently?
WISA'07 Proceedings of the 8th international conference on Information security applications
Analysis and improvement of an ID-based anonymous signcryption model
ICIC'09 Proceedings of the 5th international conference on Emerging intelligent computing technology and applications
Fully secure threshold unsigncryption
ProvSec'10 Proceedings of the 4th international conference on Provable security
Efficient generic constructions of signcryption with insider security in the multi-user setting
ACNS'11 Proceedings of the 9th international conference on Applied cryptography and network security
Dynamic attribute-based signcryption without random oracles
International Journal of Applied Cryptography
Distributed signcryption from pairings
ICISS'11 Proceedings of the 7th international conference on Information Systems Security
Dynamic attribute-based signcryption without random oracles
International Journal of Applied Cryptography
Certificate-based signcryption with enhanced security features
Computers & Mathematics with Applications
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In Information Processing Letters 2006, Tan pointed out that the anonymous signcryption scheme proposed by Yang, Wong and Deng (YWD) in ISC 2005 provides neither confidentality nor anonymity. However, no discussion has been made on whether YWD scheme can be made secure. In this paper, we propose a modification of YWD scheme which resolves the security issues of the original scheme without sacrificing its high efficiency and simple design. Indeed, we show that our scheme achieves confidentiality, existential unforgeability and anonymity with more precise reduction bounds. In addition, our scheme further improves the efficiency when compared with YWD, with reduced number of operations for both signcryption and de-signcryption.