An Improved Digital Signature Scheme Based On Time-Stamp

As an important data security technique, digital signature plays an important role in ensuring integrity, confidentiality and non-repudiation of transmitting data. And with the development and diffusion of network technology , it will be irreplaceable. In order to make the data in network more secure and more efficient, a general digital signature scheme, digital signature scheme with encrypted and the digital signature scheme of recipient non-repudiation are studied in this paper. At last, after analysis and discussion of the existing digital signature schemes, I found some limitations of these existing digital signature schemes. In order to eliminate limitations, an improved digital signature scheme based on time stamp is present. The scheme adds a digital time-stamp to digital signature scheme of recipient non-repudiation, which improves exsiting scheme with the advantages of time-stamp, and applies algorithm to it in order to confirm the superiority and innovation of this scheme.The main work of this paper as follows:1.the relevant theory about digital signature and time-stamp was researched, especially, the principium and process of the digital signature and time-stamp is analysed in detail.2.The existing digital signature schemes are analysed and discussed detailedly, and the advantages and disadvantages of these digital signature schemes are summarized, as well as the application of occasions.3.After analysis of the exsiting time-stamp scheme, a new time-stamp scheme is proposed. Then apply the improved time-stamp scheme to digital signature, a new digital signature scheme—An Improved digital signature scheme based on Time-stamp scheme, is given. And at the basis of this theory, the improved scheme will be applied to the existing algorithm so as to prove superiority of the scheme.