Digital signature scheme without hash functions and message redundancy
Tang Xiaohu · Journal of Communications · 2006
Investigated the Shieh’s and Chang’s digital signature schemes with message recovery based on the discrete logarithm problem.Firstly,gave an attack called parameter reduction on the two schemes,and then revealed a common fatal flaw of them.Secondly,proposed a new signature scheme with three parameters,which did not employ hash func-tion and message redundancy,and gave the security analysis of the new scheme.