DocumentCode :
3214842
Title :
An Improved Designated-Verifier Proxy Signature Scheme
Author :
Zhang, Jianhong
Author_Institution :
Coll. of Sci., North China Univ. of Technol., Beijing
fYear :
2007
fDate :
29-31 July 2007
Firstpage :
77
Lastpage :
82
Abstract :
As a special signature, proxy signature allows a entity called original signer to delegate his signing capability to another entity to produce signature on behalf of him. By combining the ideas of proxy signatures and designated-verifier signatures, G.L.Wang et.al. proposed a strong designated-verifier proxy signature scheme (for short DVP) and claimed that the security of their scheme was based on the computational Diffie- Hellman assumption. Unfortunately, in the paper, we give security analysis of Wang et.al´s strong designated-verifier proxy signature scheme and show that their scheme is forgeable. Namely, an adversary can forge a DVP signature on arbitrary message m without the knowledge of the proxy secret key xP or the designated verifier´s secret key xC- At the same time, we give two attacks on the Strong designated-verifier proxy signature scheme. Finally, we give an improved scheme to overcome the above forgery attacks, and show the scheme to be secure in random oracle model .
Keywords :
cryptography; digital signatures; computational Diffie-Hellman assumption; designated verifier secret key; designated-verifier proxy signature; forgery attack; proxy secret key; random oracle model; security analysis; signature forging; signing capability; Digital signatures; Distributed computing; Educational institutions; Forgery; Grid computing; Information security; Laboratories; Mobile agents; Mobile communication; Voltage control; designated-verifier proxy signature; digital signature; security analysis;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Networking, Architecture, and Storage, 2007. NAS 2007. International Conference on
Conference_Location :
Guilin
Print_ISBN :
0-7695-2927-5
Type :
conf
DOI :
10.1109/NAS.2007.12
Filename :
4286411
Link To Document :
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