The Digital Signature Security

After introducing the significance of studying the security of digital signature and blind signature, giving the concepts and definitions related which are regarded as standards at present, this paper, provides a detailed analysis of the security of the schemes in the different security grade, and then it presents the random oracle model and come to a more general conclusion than in bibliography [1]. Considering the importance of blind signatures in the e-cash . system, the paper offers a detailed discussions of the security of these schemes, and then if makes an analysis of the security of ECDSA applied widely now and proposes some amendments for more efficiency. Finally, it points out some questions those are left over and need further consideration.