Identity-based cryptosystems and signature schemes
Proceedings of CRYPTO 84 on Advances in cryptology
Proxy signatures for delegating signing operation
CCS '96 Proceedings of the 3rd ACM conference on Computer and communications security
Proxy signature schemes based on factoring
Information Processing Letters
Secure Mobile Agent Using Strong Non-designated Proxy Signature
ACISP '01 Proceedings of the 6th Australasian Conference on Information Security and Privacy
ICICS '97 Proceedings of the First International Conference on Information and Communication Security
Efficient Identity Based Signature Schemes Based on Pairings
SAC '02 Revised Papers from the 9th Annual International Workshop on Selected Areas in Cryptography
A "Paradoxical" Indentity-Based Signature Scheme Resulting from Zero-Knowledge
CRYPTO '88 Proceedings of the 8th Annual International Cryptology Conference on Advances in Cryptology
ID-Based Blind Signature and Ring Signature from Pairings
ASIACRYPT '02 Proceedings of the 8th International Conference on the Theory and Application of Cryptology and Information Security: Advances in Cryptology
An Identity-Based Signature from Gap Diffie-Hellman Groups
PKC '03 Proceedings of the 6th International Workshop on Theory and Practice in Public Key Cryptography: Public Key Cryptography
A Proposal of Short Proxy Signature using Pairing
ITCC '05 Proceedings of the International Conference on Information Technology: Coding and Computing (ITCC'05) - Volume I - Volume 01
A novel proxy key generation protocol and its application
Computer Standards & Interfaces
Efficient ID-based blind signature and proxy signature from bilinear pairings
ACISP'03 Proceedings of the 8th Australasian conference on Information security and privacy
Cryptanalysis of two signature schemes based on bilinear pairings in CISC '05
Inscrypt'06 Proceedings of the Second SKLOIS conference on Information Security and Cryptology
An identity-based proxy signature scheme from pairings
ICICS'06 Proceedings of the 8th international conference on Information and Communications Security
Identity-based proxy signature from pairings
ATC'07 Proceedings of the 4th international conference on Autonomic and Trusted Computing
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A proxy signature scheme enables an original signer to delegate his signing capability to a proxy signer and then the proxy signer can sign a message on behalf of the original signer. Recently, several ID-based proxy signature schemes have been proposed. ID-based Cryptosystems (ID-Cs) are advantageous than the traditional Public Key Cryptosystems (PKCs), as the key distribution is not required. But, an inherent problem of ID-Cs is the key escrow. Hu and Huang also proposed an ID-based proxy signature scheme with proxy key generation protocol. In Hu-Huang's scheme, whenever the original signer requests the Public Key Generation Center (PKG) to generate a proxy derivation key for a designated proxy signer, it generates a proxy key using the proxy signer's private key without his agreement. Thus, the PKG gets to infringe general privacy laws and regulations. Also, this is an example of PKG's misuse of the user's private key due to ID-C's key escrow problem. To solve these problems we propose an improvement of Hu-Huang's scheme.