Title :
Security Analysis on a Blind Signature Scheme Based on Elgamal Signature Equation
Author :
Baozheng, Yu ; Congwei, Xu
Author_Institution :
Hefei Univ. of Technol., Hefei
Abstract :
Universal forgery attacks and selected forgery attacks on both weak and strong blind signature schemes based on Elgamal signature equation proposed by Wang et al. are developed. Without using any secret key, anyone can forge a valid signature through selecting some random parameters. The possibility of forging the blind schemes is analyzed and moreover, an improved weak blind signature scheme and an improved strong blind signature scheme are designed. Also, the securities of the improved blind signatures are analyzed.
Keywords :
cryptography; digital signatures; Elgamal signature equation; blind signature; random parameter; security analysis; universal forgery attacks; Computational intelligence; Conference management; Digital signatures; Electronic commerce; Equations; Forgery; Public key; Resists; Security; Technology management;
Conference_Titel :
Computational Intelligence and Security Workshops, 2007. CISW 2007. International Conference on
Conference_Location :
Harbin
Print_ISBN :
978-0-7695-3073-4
DOI :
10.1109/CISW.2007.4425601